data in the DATAfile named StockPrices to answer the following. Let d; denote the change in price per share for company i where d; price per share minus the beginning of 2012 price per share. Use the sample mean of these values to estimate the dollar amount a share of stock has changed during the first quarter. What is the 95% confidence interval estimate of the population mean change in the price per share of stock during the first quarter? Interpret this result. first quarter of 2012 a. b. 23. Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven different categories of expenditures: transportation, groceries, dining out, household expenses, home furnishings, apparel, and entertainment. Using data from a sample of 42 credit card accounts, assume that each account was used to identify the annual credit card charges for groceries (population 1) and the annual credit card charges for dining out (population 2). Using the difference data, the sample mean difference was d= $850, and the sample standard deviation was s Formulate the null and alternative hypotheses to test for no difference between the population mean credit card charges for groceries and the population mean credit card charges for dining out. b. Use a .05 level of significance. Can you conclude that the population means dif- fer? What is the p-value? Which category, groceries or dining out, has a higher population mean annual credit card charge? What is the point estimate of the difference between the population means? What is the 95% confidence interval estimate of the difference between the $1123. a. c. population means? the domestic airfare for business travel for
data in the DATAfile named StockPrices to answer the following. Let d; denote the change in price per share for company i where d; price per share minus the beginning of 2012 price per share. Use the sample mean of these values to estimate the dollar amount a share of stock has changed during the first quarter. What is the 95% confidence interval estimate of the population mean change in the price per share of stock during the first quarter? Interpret this result. first quarter of 2012 a. b. 23. Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven different categories of expenditures: transportation, groceries, dining out, household expenses, home furnishings, apparel, and entertainment. Using data from a sample of 42 credit card accounts, assume that each account was used to identify the annual credit card charges for groceries (population 1) and the annual credit card charges for dining out (population 2). Using the difference data, the sample mean difference was d= $850, and the sample standard deviation was s Formulate the null and alternative hypotheses to test for no difference between the population mean credit card charges for groceries and the population mean credit card charges for dining out. b. Use a .05 level of significance. Can you conclude that the population means dif- fer? What is the p-value? Which category, groceries or dining out, has a higher population mean annual credit card charge? What is the point estimate of the difference between the population means? What is the 95% confidence interval estimate of the difference between the $1123. a. c. population means? the domestic airfare for business travel for
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Answer problem no. 23 only
Transcribed Image Text:quarter is an indicator of what is ahead for the stock market and the economy. Use the sample
data in the DATAfile named StockPrices to answer the following.
Let d; denote the change in price per share for company i where d;
price per share minus the beginning of 2012 price per share. Use the sample mean of these
values to estimate the dollar amount a share of stock has changed during the first quarter.
What is the 95% confidence interval estimate of the population mean change in the
price per share of stock during the first quarter? Interpret this result.
Bank of America's Consumer Spending Survey collected data on annual credit card
charges in seven different categories of expenditures: transportation, groceries, dining
out, household expenses, home furnishings, apparel, and entertainment. Using data from
a sample of 42 credit card accounts, assume that each account was used to identify the
annual credit card charges for groceries (population 1) and the annual credit card charges
for dining out (population 2). Using the difference data, the sample mean difference was
d $850, and the sample standard deviation was s
Formulate the null and alternative hypotheses to test for no difference between the
population mean credit card charges for groceries and the population mean credit card
charges for dining out.
b. Use a .05 level of significance. Can you conclude that the population means dif-
fer? What is the p-value?
Which category, groceries or dining out, has a higher population mean annual credit
card charge? What is the point estimate of the difference between the population
means? What is the 95% confidence interval estimate of the difference between the
population means?
first quarter of 2012
a.
b.
23.
$1123.
a.
c.
the domestic airfare for business travel for
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