Test: POST UNIT 7 - TEST - Ch. 10 Question 3 This Test: 13 pfs possible According to a report, the mean of monthly cell phone bills was $49 72 three years ago. A researcher suspects that the mean of monthly cell phone bills is less today (a) Determine the hull 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 (Type integers or decimals, Do not round ) (b) Explain what it would mean to make a Type I error, Choose the correct answer below. 3) A. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is different from $49.72. when in fact the mean of the bill is 940.72. ()B. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is less than $49 72, when in fact the mean of the bill is less than $49 72. Q) C. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is less than $49,72. when in fact the mean of the bill is $49 72. D. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is different from $49 72, when in fact the mean of the bill is different from $49. 72. (c) Explain what it would mean to make a Type il error. Choose the correct answer below A The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is less than $49.72, when in fact the mean of the bill is less than $49 72. 0. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is less than $49.72, when in fact the mean of the bill is less than $49.72. C. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is different from $49.72. when in fact the mean of the bill is different from $40 72. C) D. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is less than $49 72, when in fact the mean of the bill is 549.72. Click to select your answer() StatCrunch