It is known that 10% of the customers in an electronics store purchase an MP3 player. A random sample of 30 customers is selected. Assume that the customers' purchases are made independently. In this binomial distribution application, which Excel statement will find the probability of 10 or fewer customers who purchase an MP3 player in this electronics store?

=1- BINOMDIST(10,30,10%,TRUE)

=1- BINOMDIST(10,30,10%,FALSE)

=BINOMDIST(10,30,10%,TRUE)

=BINOMDIST(10,30,10%,FALSE)

The distribution of IQ scores for high school graduates is normally distributed with a mean of 95 and a standard deviation of 15. Identify the Excel statement that will find the probability that a person chosen at random from this group has an IQ score above 147.

=1-NORMSDIST(147)

=1-NORMSDIST(3.467)

=NORMSDIST(3.467)

=1-NORMSDIST(95)

=NORMSDIST(147)

EPA studies of fuel consumption indicate compact car mileage to be normally distributed with a mean of 25.1 and a standard deviation of 4 mpg. Identify the Excel statement that will find the percentage of compact cars that get between 20 and 36 mpg.

=[1-NORMSDIST(20)-NORMSDIST(36)]*100

=[1-NORMSDIST(-1.275)-NORMSDIST(2.725)]*100

=[NORMSDIST(20)-NORMSDIST(36)]*100

=[NORMSDIST(-1.275)-NORMSDIST(2.725)]*100

=[NORMSDIST(-1.275)+NORMSDIST(2.725)]*100

Compute the margin of error in estimating a population mean for a sample size of 600 and a variance of 4. Round your answer to the thousandths place.

0.051

0.160

0.506

0.759

A sample size of 150 is to be used to test the hypotheses

H₀: = 8.3 vs. H_a: 8.3

where is the true average weight of a newborn American baby. Determine the appropriate rejection region with a significance level of alpha = 0.05.

a.Reject H₀if z >2.58 or z < -2.58

b.Reject H₀if z <2.58 and z > -2.58

c.Reject H₀if z >1.96 or z < -1.96

d.Reject H₀if z <1.96 and z > -1.96

e.Reject H₀if z >1.645 or z < -1.645

f.Reject H₀if z <1.645 and z > -1.645