cfi/468!/4/4@0.00:55.8 u. Kepeat preccug nypotneSIS Test usig car value approacn. 16. Credit Card Use by Undergraduates. In a study entitled How Undergraduate Stu- dents Use Credit Cards, it was reported that undergraduate students have a mean credit card balance of $3173. This figure was an all-time high and had increased 44% over the previous five years. Assume that a current study is being conducted to determine if it can be concluded that the mean credit card balance for undergraduate students has continued to increase compared to the original report. Based on previous studies, use a population standard deviation o $1000. a. State the null and alternative hypotheses. b. What is the p-value for a sample of 180 undergraduate students with a sample mean credit card balance of $3325? c. Using a .05 level of significance, what is your conclusion? 17. 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 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 test whether the popu- lation 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 com- pute 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. 18. CPA Work Hours. The American Institute of Certified Tax Planners reports that the average U.S. CPA works 60 hours per week during tax season. Do CPAS in states that We've updated our read aloud Give it a try here. WCN 02-200-202 Learning. AlI Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Aa ned rat ka conad soanned or dunlicatd in whala or n nart e ta elactronic nahte cama thid nartyNntant ma ha unnraceahed fram ha aRaml andrr )E

cfi/468!/4/4@0.00:55.8 u. Kepeat preccug nypotneSIS Test usig car value approacn. 16. Credit Card Use by Undergraduates. In a study entitled How Undergraduate Stu- dents Use Credit Cards, it was reported that undergraduate students have a mean credit card balance of $3173. This figure was an all-time high and had increased 44% over the previous five years. Assume that a current study is being conducted to determine if it can be concluded that the mean credit card balance for undergraduate students has continued to increase compared to the original report. Based on previous studies, use a population standard deviation o $1000. a. State the null and alternative hypotheses. b. What is the p-value for a sample of 180 undergraduate students with a sample mean credit card balance of $3325? c. Using a .05 level of significance, what is your conclusion? 17. 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 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 test whether the popu- lation 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 com- pute 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. 18. CPA Work Hours. The American Institute of Certified Tax Planners reports that the average U.S. CPA works 60 hours per week during tax season. Do CPAS in states that We've updated our read aloud Give it a try here. WCN 02-200-202 Learning. AlI Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Aa ned rat ka conad soanned or dunlicatd in whala or n nart e ta elactronic nahte cama thid nartyNntant ma ha unnraceahed fram ha aRaml andrr )E

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Problem 17 c-d

cfi/468!/4/4@0.00:55.8
u. Kepeat preccug nypotneSIS Test usig car value approacn.
16. Credit Card Use by Undergraduates. In a study entitled How Undergraduate Stu-
dents Use Credit Cards, it was reported that undergraduate students have a mean credit
card balance of $3173. This figure was an all-time high and had increased 44% over
the previous five years. Assume that a current study is being conducted to determine
if it can be concluded that the mean credit card balance for undergraduate students has
continued to increase compared to the original report. Based on previous studies, use a
population standard deviation o $1000.
a. State the null and alternative hypotheses.
b. What is the p-value for a sample of 180 undergraduate students with a sample mean
credit card balance of $3325?
c. Using a .05 level of significance, what is your conclusion?
17. 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 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 test whether the popu-
lation 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 com-
pute 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.
18. CPA Work Hours. The American Institute of Certified Tax Planners reports that the
average U.S. CPA works 60 hours per week during tax season. Do CPAS in states that
We've updated our read aloud
Give it a try here.
WCN 02-200-202
Learning. AlI Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.
Aa
ned rat ka conad soanned or dunlicatd in whala or n nart e ta elactronic nahte cama thid nartyNntant ma ha unnraceahed fram ha aRaml andrr
)E

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