The IQ scores of a population are normally distributed with a mean of 100 and a standard deviation of 15. Find the range of IQ scores that covers the middle 95% of the population.

Given: P(a<X<b)=P(-c<Z<c)=95%. 

The value of a is __________.

Thus, the middle 95% covers IQ scores from a to b.

(a)  The heights of adult males in a population follow a normal distribution with a mean of 70 inches and a standard deviation of 3 inches. What is the probability that a randomly selected adult male is taller than 73 inches?

The required probability is

The IQ scores of a population are normally distributed with a mean of 100 and a standard deviation of 15. Find the range of IQ scores that covers the middle 95% of the population.

Given: P(a<X<b)=P(-c<Z<c)=95%. 

The value of c is __________.

Thus, the middle 95% covers IQ scores from a to b.

Was passt? Wählen Sie.

Das ist das schönste Gemälde ________.

Was passt? Wählen Sie.

Das ist das Fahrrad _________.

Ergänzen Sie die Endungen:

І

ch  suche  d…. 

richtig….  Job. 

Was passt? Wählen Sie.

Das ist das Buch ___________.

Ergänzen Sie die Endungen:

Er  mag  d… 

braun… Anzug.

Ergänzen Sie die Endungen:

Also, d…. weiß….  Hemd 

ist  cool! 

A student takes a ten-question true/false exam. By using the binomial distribution,

Find the probability that the student will obtain a passing grade of 60% or greater simply by guessing