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Laurie ran a human resources consulting business

that helped companies hire new employees. 

One of the tests they gave to potential employees was a test of racial

prejudice.  She knew the average score on

this test was 10, with a standard deviation of 9.5.  She wants to know the probability that a person could

score as low as -10 on this test.  Which

equation should she

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Samara is doing research into factors that make

engineering students more likely to persist through their program.  Let’s assume she knew the average GPA for

students in this program was 3.20, with a standard deviation of 0.80. To

explore the situation, she began by accessing information about the population

of GPAs for these students.  Suppose she

wanted to know which GPA would put a particular student in the bottom 10% of

the distribution.  Which equation should

she

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In a distribution of Pokemon Go players, the

average XP earned per day was 20,000, with a standard deviation of 5,000.  Which is more likely, that one Pokemon player

will earn 30,000 XP in a day, or that a sample of 5 players will earn an

average of 30,000 XP a

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Sample size has an impact on the standard

error.  In any given study, the standard

error will be ________ if the sample size

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{

c = document.all(com_id);

a = document.all(anchor_id);

if (null != c && null == c.length && null != a && null == a.length)

{

var cw = c.offsetWidth;

var ch = c.offsetHeight;

var aw = a.offsetWidth;

var ah = a.offsetHeight;

var x = a.offsetLeft;

var y = a.offsetTop;

var el = a;

while (el.tagName != "BODY")

{

el = el.offsetParent;

x = x + el.offsetLeft;

y = y + el.offsetTop;

}

var bw = document.body.clientWidth;

var bh = document.body.clientHeight;

var bsl = document.body.scrollLeft;

var bst = document.body.scrollTop;

if (x + cw + ah / 2 > bw + bsl && x + aw - ah / 2 - cw >= bsl )

{ c.style.left = x + aw - ah / 2 - cw; }

else

{ c.style.left = x + ah / 2; }

if (y + ch + ah / 2 > bh + bst && y + ah / 2 - ch >= bst )

{ c.style.top = y + ah / 2 - ch; }

else

{ c.style.top = y + ah / 2; }

c.style.visibility = "visible";

} } }

function msoCommentHide(com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

if (null != c && null == c.length)

{

c.style.visibility = "hidden";

c.style.left = -1000;

c.style.top = -1000;

} }

}

function msoBrowserCheck()

{

ms = navigator.appVersion.indexOf("MSIE");

vers = navigator.appVersion.substring(ms + 5, ms + 6);

ie4 = (ms > 0) && (parseInt(vers) >= 4);

return ie4;

}

if (msoBrowserCheck())

{

document.styleSheets.dynCom.addRule(".msocomanchor","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomoff","display: none");

document.styleSheets.dynCom.addRule(".msocomtxt","visibility: hidden");

document.styleSheets.dynCom.addRule(".msocomtxt","position: absolute");

document.styleSheets.dynCom.addRule(".msocomtxt","top: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","left: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","width: 33%");

document.styleSheets.dynCom.addRule(".msocomtxt","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomtxt","color: infotext");

document.styleSheets.dynCom.addRule(".msocomtxt","border-top: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-right: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-bottom: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-left: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","padding: 3pt 3pt 3pt 3pt");

document.styleSheets.dynCom.addRule(".msocomtxt","z-index: 100");

}

// -->

Using a z-table, determine what probability

corresponds to a z-score of 3.0 or

<!--

function msoCommentShow(anchor_id, com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

a = document.all(anchor_id);

if (null != c && null == c.length && null != a && null == a.length)

{

var cw = c.offsetWidth;

var ch = c.offsetHeight;

var aw = a.offsetWidth;

var ah = a.offsetHeight;

var x = a.offsetLeft;

var y = a.offsetTop;

var el = a;

while (el.tagName != "BODY")

{

el = el.offsetParent;

x = x + el.offsetLeft;

y = y + el.offsetTop;

}

var bw = document.body.clientWidth;

var bh = document.body.clientHeight;

var bsl = document.body.scrollLeft;

var bst = document.body.scrollTop;

if (x + cw + ah / 2 > bw + bsl && x + aw - ah / 2 - cw >= bsl )

{ c.style.left = x + aw - ah / 2 - cw; }

else

{ c.style.left = x + ah / 2; }

if (y + ch + ah / 2 > bh + bst && y + ah / 2 - ch >= bst )

{ c.style.top = y + ah / 2 - ch; }

else

{ c.style.top = y + ah / 2; }

c.style.visibility = "visible";

} } }

function msoCommentHide(com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

if (null != c && null == c.length)

{

c.style.visibility = "hidden";

c.style.left = -1000;

c.style.top = -1000;

} }

}

function msoBrowserCheck()

{

ms = navigator.appVersion.indexOf("MSIE");

vers = navigator.appVersion.substring(ms + 5, ms + 6);

ie4 = (ms > 0) && (parseInt(vers) >= 4);

return ie4;

}

if (msoBrowserCheck())

{

document.styleSheets.dynCom.addRule(".msocomanchor","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomoff","display: none");

document.styleSheets.dynCom.addRule(".msocomtxt","visibility: hidden");

document.styleSheets.dynCom.addRule(".msocomtxt","position: absolute");

document.styleSheets.dynCom.addRule(".msocomtxt","top: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","left: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","width: 33%");

document.styleSheets.dynCom.addRule(".msocomtxt","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomtxt","color: infotext");

document.styleSheets.dynCom.addRule(".msocomtxt","border-top: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-right: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-bottom: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-left: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","padding: 3pt 3pt 3pt 3pt");

document.styleSheets.dynCom.addRule(".msocomtxt","z-index: 100");

}

// -->

In a distribution of GPAs with a mean of 2.85,

and a standard deviation of 0.10, what GPA corresponds to a z score of -

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function msoCommentShow(anchor_id, com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

a = document.all(anchor_id);

if (null != c && null == c.length && null != a && null == a.length)

{

var cw = c.offsetWidth;

var ch = c.offsetHeight;

var aw = a.offsetWidth;

var ah = a.offsetHeight;

var x = a.offsetLeft;

var y = a.offsetTop;

var el = a;

while (el.tagName != "BODY")

{

el = el.offsetParent;

x = x + el.offsetLeft;

y = y + el.offsetTop;

}

var bw = document.body.clientWidth;

var bh = document.body.clientHeight;

var bsl = document.body.scrollLeft;

var bst = document.body.scrollTop;

if (x + cw + ah / 2 > bw + bsl && x + aw - ah / 2 - cw >= bsl )

{ c.style.left = x + aw - ah / 2 - cw; }

else

{ c.style.left = x + ah / 2; }

if (y + ch + ah / 2 > bh + bst && y + ah / 2 - ch >= bst )

{ c.style.top = y + ah / 2 - ch; }

else

{ c.style.top = y + ah / 2; }

c.style.visibility = "visible";

} } }

function msoCommentHide(com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

if (null != c && null == c.length)

{

c.style.visibility = "hidden";

c.style.left = -1000;

c.style.top = -1000;

} }

}

function msoBrowserCheck()

{

ms = navigator.appVersion.indexOf("MSIE");

vers = navigator.appVersion.substring(ms + 5, ms + 6);

ie4 = (ms > 0) && (parseInt(vers) >= 4);

return ie4;

}

if (msoBrowserCheck())

{

document.styleSheets.dynCom.addRule(".msocomanchor","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomoff","display: none");

document.styleSheets.dynCom.addRule(".msocomtxt","visibility: hidden");

document.styleSheets.dynCom.addRule(".msocomtxt","position: absolute");

document.styleSheets.dynCom.addRule(".msocomtxt","top: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","left: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","width: 33%");

document.styleSheets.dynCom.addRule(".msocomtxt","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomtxt","color: infotext");

document.styleSheets.dynCom.addRule(".msocomtxt","border-top: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-right: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-bottom: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-left: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","padding: 3pt 3pt 3pt 3pt");

document.styleSheets.dynCom.addRule(".msocomtxt","z-index: 100");

}

// -->

Using a z-table, determine what probability

corresponds to a z-score of 1.0 or

<!--

function msoCommentShow(anchor_id, com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

a = document.all(anchor_id);

if (null != c && null == c.length && null != a && null == a.length)

{

var cw = c.offsetWidth;

var ch = c.offsetHeight;

var aw = a.offsetWidth;

var ah = a.offsetHeight;

var x = a.offsetLeft;

var y = a.offsetTop;

var el = a;

while (el.tagName != "BODY")

{

el = el.offsetParent;

x = x + el.offsetLeft;

y = y + el.offsetTop;

}

var bw = document.body.clientWidth;

var bh = document.body.clientHeight;

var bsl = document.body.scrollLeft;

var bst = document.body.scrollTop;

if (x + cw + ah / 2 > bw + bsl && x + aw - ah / 2 - cw >= bsl )

{ c.style.left = x + aw - ah / 2 - cw; }

else

{ c.style.left = x + ah / 2; }

if (y + ch + ah / 2 > bh + bst && y + ah / 2 - ch >= bst )

{ c.style.top = y + ah / 2 - ch; }

else

{ c.style.top = y + ah / 2; }

c.style.visibility = "visible";

} } }

function msoCommentHide(com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

if (null != c && null == c.length)

{

c.style.visibility = "hidden";

c.style.left = -1000;

c.style.top = -1000;

} }

}

function msoBrowserCheck()

{

ms = navigator.appVersion.indexOf("MSIE");

vers = navigator.appVersion.substring(ms + 5, ms + 6);

ie4 = (ms > 0) && (parseInt(vers) >= 4);

return ie4;

}

if (msoBrowserCheck())

{

document.styleSheets.dynCom.addRule(".msocomanchor","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomoff","display: none");

document.styleSheets.dynCom.addRule(".msocomtxt","visibility: hidden");

document.styleSheets.dynCom.addRule(".msocomtxt","position: absolute");

document.styleSheets.dynCom.addRule(".msocomtxt","top: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","left: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","width: 33%");

document.styleSheets.dynCom.addRule(".msocomtxt","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomtxt","color: infotext");

document.styleSheets.dynCom.addRule(".msocomtxt","border-top: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-right: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-bottom: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-left: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","padding: 3pt 3pt 3pt 3pt");

document.styleSheets.dynCom.addRule(".msocomtxt","z-index: 100");

}

// -->

The probability associated with the body of the

curve for a particular z-score tells you how likely it is that a score would

<!--

function msoCommentShow(anchor_id, com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

a = document.all(anchor_id);

if (null != c && null == c.length && null != a && null == a.length)

{

var cw = c.offsetWidth;

var ch = c.offsetHeight;

var aw = a.offsetWidth;

var ah = a.offsetHeight;

var x = a.offsetLeft;

var y = a.offsetTop;

var el = a;

while (el.tagName != "BODY")

{

el = el.offsetParent;

x = x + el.offsetLeft;

y = y + el.offsetTop;

}

var bw = document.body.clientWidth;

var bh = document.body.clientHeight;

var bsl = document.body.scrollLeft;

var bst = document.body.scrollTop;

if (x + cw + ah / 2 > bw + bsl && x + aw - ah / 2 - cw >= bsl )

{ c.style.left = x + aw - ah / 2 - cw; }

else

{ c.style.left = x + ah / 2; }

if (y + ch + ah / 2 > bh + bst && y + ah / 2 - ch >= bst )

{ c.style.top = y + ah / 2 - ch; }

else

{ c.style.top = y + ah / 2; }

c.style.visibility = "visible";

} } }

function msoCommentHide(com_id)

{

if(msoBrowserCheck())

{

c = document.all(com_id);

if (null != c && null == c.length)

{

c.style.visibility = "hidden";

c.style.left = -1000;

c.style.top = -1000;

} }

}

function msoBrowserCheck()

{

ms = navigator.appVersion.indexOf("MSIE");

vers = navigator.appVersion.substring(ms + 5, ms + 6);

ie4 = (ms > 0) && (parseInt(vers) >= 4);

return ie4;

}

if (msoBrowserCheck())

{

document.styleSheets.dynCom.addRule(".msocomanchor","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomoff","display: none");

document.styleSheets.dynCom.addRule(".msocomtxt","visibility: hidden");

document.styleSheets.dynCom.addRule(".msocomtxt","position: absolute");

document.styleSheets.dynCom.addRule(".msocomtxt","top: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","left: -1000");

document.styleSheets.dynCom.addRule(".msocomtxt","width: 33%");

document.styleSheets.dynCom.addRule(".msocomtxt","background: infobackground");

document.styleSheets.dynCom.addRule(".msocomtxt","color: infotext");

document.styleSheets.dynCom.addRule(".msocomtxt","border-top: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-right: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-bottom: 2pt solid threedshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","border-left: 1pt solid threedlightshadow");

document.styleSheets.dynCom.addRule(".msocomtxt","padding: 3pt 3pt 3pt 3pt");

document.styleSheets.dynCom.addRule(".msocomtxt","z-index: 100");

}

// -->

A z-score of two tells you that your score fell

two __________ from the