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Fall 2026-91195-202690-PSY208-N02 - Statistics

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The population full-time equivalent number of students (FTES) for 2005–2006 through 2010–2011 was given in an updated report. The data are reported here.

Year

2005–06

2006–07

2007–08

2008–09

2009–10

2010–11

Total FTES

1,585

1,690

1,735

1,935

2,021

1,890

Calculate the interquartile range (IQR). Round to one decimal place. IQR = Q3-Q1

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The population full-time equivalent number of students (FTES) for 2005–2006 through 2010–2011 was given in an updated report. The data are reported here.

Year

2005–06

2006–07

2007–08

2008–09

2009–10

2010–11

Total FTES

1,585

1,690

1,735

1,935

2,021

1,890

Calculate the standard deviation. Round to one decimal place. Use the population standard deviation formula.

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The population full-time equivalent number of students (FTES)

for 2005–2006 through 2010–2011 was given in an updated report. The data are

reported here.

Year

2005–06

2006–07

2007–08

2008–09

2009–10

2010–11

Total FTES

1,585

1,690

1,735

1,935

2,021

1,890

Calculate the mean. Round to one decimal place.

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0%
100%
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If

the data were collected by asking the first 111 people who entered the store,

then the type of sampling is:

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Suppose one hundred eleven people who shopped in a special

t-shirt store were asked the number of t-shirts they own costing more than $19

each.

The percentage

of people who own at most three

t-shirts (i.e.

owning 3 or fewer t-shirts) costing more than $19 each is approximately:

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The following box plot shows the U.S. population for 1990,

the latest available year.

Are there fewer or more children (age 17 and under) than senior citizens (age 65 and over)?

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The following box plot shows the U.S. population for 1990, the latest available year.

12.6%

are age 65 and over. Approximately what percentage of the population are

working age adults (above age 17 to age 65)?

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The following box plot shows the U.S. population for 1990, the latest available year.

How do you know if there are fewer or more children (age 17 and under) than senior citizens (age 65 and over)?

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Fifty part-time students were asked how many courses they

were taking this term. The (incomplete) results are shown below:

# of Courses

Frequency

Relative Frequency

Cumulative Relative Frequency

1

30

0.6

0.6

2

15

b. ?

c?

3

a.?

0.1

1

c. What

percent of students take one or two courses?

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“Number

of times per week” is what type of data?

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