Use of Texting. TextRequest reports that adults 18-24 years old send andreceive 128 texts every day. Suppose we take a sample of 25-34 year oldsto see if their mean number of daily texts differs from the mean for 18-24 year olds reported by TextRequest. a. State the null and alternative hypotheses we should use to testwhether the population mean daily number of texts for 25-34 yearolds differs from the population daily mean number of texts for 18-24 year olds.b. Suppose a sample of thirty 25-34 year olds showed a sample mean of 118.6 texts per day. Assume a population standarddeviation of 33.17 texts per day and compute the p-value.c. With a = .05 as the level of significance, what is your conclusion?d. Repeat the preceding hypothesis test using the critical valueapproach.
Use of Texting. TextRequest reports that adults 18-24 years old send and
receive 128 texts every day. Suppose we take a sample of 25-34 year olds
to see if their
24 year olds reported by TextRequest.
a. State the null and alternative hypotheses we should use to test
whether the population mean daily number of texts for 25-34 year
olds differs from the population daily mean number of texts for 18-
24 year olds.
b. Suppose a sample of thirty 25-34 year olds showed a sample mean of 118.6 texts per day. Assume a population standard
deviation of 33.17 texts per day and compute the p-value.
c. With a = .05 as the level of significance, what is your conclusion?
d. Repeat the preceding hypothesis test using the critical value
approach.
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