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A marketing firm is doing research for an Internet-based company. It wants to appeal to the age group of people who spend the most money online. The company wants to know if there is a difference in the mean amount of money people spend per month on Internet purchases depending on their age bracket. The marketing firm looked at two age groups, 18-24 years and 25-30 years, and collected the data shown in the following table. Let Population 1 be the amount of money spent per month on Internet purchases by people in the 18-24 age bracket and Population 2 be the amount of money spent per month on Internet purchases by people in the 25-30 age bracket. Assume that the population variances are not the same. Internet Spending per Month 18-24 Years 25-30 Years Mean Amount Spent 55.19 65.24 Standard Deviation 11.39 13.68 Sample Size 21 25 Step 2 of 2: Interpret the confidence interval (- 16.43, – 3.67) obtained in Step 1. Answer E Tables в Кеурad Keyboard Shortcut Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 90% confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 more than the mean amount of money spent on Internet purchases for ages 25-30 years. Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 90 % confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 less than the mean amount of money spent on Internet purchases for ages 25-30 years.

A marketing firm is doing research for an Internet-based company. It wants to appeal to the age group of people who spend the most money online. The company wants to know if there is a difference in the mean amount of money people spend per month on Internet purchases depending on their age bracket. The marketing firm looked at two age groups, 18-24 years and 25-30 years, and collected the data shown in the following table. Let Population 1 be the amount of money spent per month on Internet purchases by people in the 18-24 age bracket and Population 2 be the amount of money spent per month on Internet purchases by people in the 25-30 age bracket. Assume that the population variances are not the same. Internet Spending per Month 18-24 Years 25-30 Years Mean Amount Spent 55.19 65.24 Standard Deviation 11.39 13.68 Sample Size 21 25 Step 2 of 2: Interpret the confidence interval (- 16.43, – 3.67) obtained in Step 1. Answer E Tables в Кеурad Keyboard Shortcut Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 90% confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 more than the mean amount of money spent on Internet purchases for ages 25-30 years. Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 90 % confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 less than the mean amount of money spent on Internet purchases for ages 25-30 years.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 4BGP
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A marketing firm is doing research for an Internet-based company. It wants to appeal to the age group of people who spend the most money online. The company wants to know if there is a difference in the mean amount of money people spend per month on Internet purchases depending on their age bracket. The marketing firm looked at two age groups, 18-24 years and 25-30 years, and collected the data shown in the following table. Let Population 1 be the amount of money spent per month on Internet purchases by people in the 18-24 age bracket and Population 2 be the amount of money spent per month on Internet purchases by people in the 25-30 age bracket. Assume that the population variances are not the same. Internet Spending per Month 18-24 Years 25-30 Years Mean Amount Spent 55.19 65.24 Standard Deviation 11.39 13.68 Sample Size 21 25 Step 2 of 2: Interpret the confidence interval (–16.43, – 3.67) obtained in Step 1. Answer 曲 Tables Keypad Keyboard Shortcuts Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 90% confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 more than the mean amount of money spent on Internet purchases for ages 25-30 years. Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 90 % confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 less than the mean amount of money spent on Internet purchases for ages 25-30 years.
Transcribed Image Text:A marketing firm is doing research for an Internet-based company. It wants to appeal to the age group of people who spend the most money online. The company wants to know if there is a difference in the mean amount of money people spend per month on Internet purchases depending on their age bracket. The marketing firm looked at two age groups, 18-24 years and 25-30 years, and collected the data shown in the following table. Let Population 1 be the amount of money spent per month on Internet purchases by people in the 18-24 age bracket and Population 2 be the amount of money spent per month on Internet purchases by people in the 25-30 age bracket. Assume that the population variances are not the same. Internet Spending per Month 18-24 Years 25-30 Years Mean Amount Spent 55.19 65.24 Standard Deviation 11.39 13.68 Sample Size 21 25 Step 2 of 2: Interpret the confidence interval (–16.43, – 3.67) obtained in Step 1. Answer 曲 Tables Keypad Keyboard Shortcuts Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 90% confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 more than the mean amount of money spent on Internet purchases for ages 25-30 years. Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 90 % confidence level. We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $3.67 and $16.43 less than the mean amount of money spent on Internet purchases for ages 25-30 years.
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