Question

According to a report, the standard deviation of monthly cell phone bills was $49.64 three years ago. A researcher suspects that the standard deviation of monthly cell phone bills is different from today. (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 Il error. (a) State the hypotheses. Ho HY (Type integers or decimals. Do not round.) (b) Explain what it would mean to make a Type I error. Choose the correct answer below. O A. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.64, when in fact the standard deviation of the bill is $49.64. B. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is higher than $49.64, when in fact the standard deviation of the bill is $49.64. OC. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.64, when in fact the standard deviation of the bill is different from $49.64. OD. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $49.64, when in fact the standard deviation of the bill is higher than $49.64. (c) Explain what it would mean to make a Type Il error. Choose the correct answer below. O A. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.64, when in fact the standard deviation of the bill is $49.64. B. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $49.64, when in fact the standard deviation of the bill is higher than $49.64. OC. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.64, when in fact the standard deviation of the bill is different from $49.64. OD. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.64, when in fact the standard deviation of the bill is different from $49.64.

Answer 1

PO NO Answer:- Given that, standard deviation (a) = 49.64 Null and Alternative Hypothesis Ho: = 49.64 Hi! #49.64 b) 15 The sample led the Hence, option Correct evidence the researcher to believe sid of monthly different cell phone bill is from $49.64 when in the standard deviation op bill is $49-64 fact c) the sample lead Hence, option is correct. evidence did not the researcher to believe the standard deviation cell phone bill is different from $49.64 when fact the std of bill is different from $49.64 of monthly in