Test: POST UNIT 7 - TEST - Ch. 10 This test: 13 point(s) possible E 105 Is the hypothesis test left-tailed, right-tailed, or two-tailed? O Left-tailed test O Two-tailed test O Right-tailed test What parameter is being tested? O Population standard deviation O Population proportion O Population mean w ClimateChange (1) - WordE Test: POST UNIT 7 - TEST - Ch. 10 Question 2 of 13 This test: 13 point(s) possible This question: 1 point(s) possible Three years ago, the mean price of an existing single-family home was $243,719. A real estate broker believes that existing home prices in her neighborhood are higher. (a) Determine the null and alternative hypotheses. (b) Explain what it would mean to make a Type I error. (c) Explain what it would mean to make a Type II error. (a) State the hypotheses. Ho H1 : s (Type integers or decimals. Do not round.) (b) Which of the following is a Type I error? O A. The broker rejects the hypothesis that the mean price is $243,719, when it is the true mean cost. O B. The broker rejects the hypothesis that the mean price is $243,719, when the true mean price is greater than $243,719. O C. The broker fails to reject the hypothesis that the mean price is $243,719, when it is the true mean cost. O D. The broker fails to reject the hypothesis that the mean price is $243,719, when the true mean price is greater than $243, 719. (c) Which of the following is a Type II error? O A. The broker rejects the hypothesis that the mean price is $243,719, when it is the true mean cost. O B. The broker fails to reject the hypothesis that the mean price is $243,719, when the true mean price is greater than $243, 719. O C. The broker fails to reject the hypothesis that the mean price is $243,719, when it is the true mean cost O D. The broker rejects the hypothesis that the mean price is $243,719, when the true mean price is greater than $243, 719.E Test: POST UNIT 7 - TEST - Ch. 10 Question 3 of 13 \"We\" 13' \"0'\"\"53' "M\" This question: I tiointi's) possible According to a report, the standard deViation of monthly cell phone bills was $48 52 three years ago Aresearcher suspects that the standard deviation of monthly cell phone bills is different from today la} Determine the null and alternative hypotheses (b) Explain what itwould mean to make a Typel error {1:} Explain what itwould mean to make a Type II error. (a) State the hypotheses HD: v v $ H1: v v s (Type integers or decimals Do not round ) (b) Explain what it would mean to make a Type I error. Choose the comer: answer below 0 A. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $48.52, when in fact the standard deviation ofthe bill is different from $48.52 0 B. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $48.52, when in fact the standard deviation ofthe bill is higher than $48.52 0 C. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $48.52, when in fact the standard deviation of the hill is $48 52 O D. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is higher than $48.52, when in fact the standard deviation of the bill is $48.52 (G) Explain what ilwould man to make a Type II error Choose the correct answer below 0 A. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $48.52, when in Ed the standard deviation of the bill is different from $48.52. 0 B. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $48.52, when in fact the standard deviation of the bill is $48 52 O C. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $48.52, when in fact the standard deviation ofthe bill is different from $48.52 0 D. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $48.52, when in fact the standard deviation ofthe bill is higher than $48.52 MAT 220 _Statistics |_2021 TERMO Andrew Bro E Test: POST UNIT 7 - TEST - Ch. 10 Question 4 of 13 This test: 13 point(s) possible This question: 1 point(s) possible Suppose the null hypothesis is rejected. State the conclusion based on the results of the test. Three years ago, the mean price of a single-family home was $243,708. A real estate broker believes that the mean price has decreased since then. Which of the following is the correct conclusion? O A. There is sufficient evidence to conclude that the mean price of a single-family home has decreased. O B. There is sufficient evidence to conclude that the mean price of a single-family home has not changed. O C. There is not sufficient evidence to conclude that the mean price of a single-family home has not changed. O D. There is not sufficient evidence to conclude that the mean price of a single-family home has decreased.E Test: POST UNIT 7 - TEST - Ch. 10 Question 5 of 13 > This test: 13 point(s) possible This question: 1 point(s) possible Submit test According to a food website, the mean consumption of popcorn annually by Americans is 64 quarts. The marketing division of the food website unleashes an aggressive campaign designed to get Americans to consume even more popcorn. Complete parts (a) through (c) below. (a) Determine the null and alternative hypotheses that would be used to test the effectiveness of the marketing campaign. (Type integers or decimals. Do not round.) (b) A sample of 802 Americans provides enough evidence to conclude that marketing campaign was effective. Provide a statement that should be put out by the marketing department. O A. There is sufficient evidence to conclude that the mean consumption of popcorn has risen. O B. There is not sufficient evidence to conclude that the mean consumption of popcorn has stayed the same. O C. There is not sufficient evidence to conclude that the mean consumption of popcorn has risen. O D. There is sufficient evidence to conclude that the mean consumption of popcorn has stayed the same. (c) Suppose, in fact, the mean annual consumption of popcorn after the marketing campaign is 64 quarts. Has a Type I or Type II error been made by the marketing department? If we tested this hypothesis at the