The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. What parameter is being tested? Ho: H = 125 Hy : H > 125 . . . 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? Population mean O Population standard deviation O Population proportionAccording to a report, the standard deviation of monthly cell phone bills was $49.05 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 | error. (c) Explain what it would mean to make a Type II error. .. . (a) State the hypotheses. Ho: Hy: (Type integers or decimals. Do not round.) (b) Explain what it would mean to make a Type | 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 higher than $49.05, when in fact the standard deviation of the bill is $49.05. O B. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is $49.05. O C. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $49.05, when in fact the standard deviation of the bill is higher than $49.05. O D. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is different from $49.05. (c) Explain what it would mean to make a Type II 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 $49.05, when in fact the standard deviation of theAccording to a report, the standard deviation of monthly cell phone bills was $49.05 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 | error. (c) Explain what it would mean to make a Type II error. . . . UA. Ine sample evidence lea ine researcher to believe the stanaara deviation of the monthly cell phone pill Is nigner inan $49.US, when in fact ine standard deviation Of Ine bill is $49.05. O B. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is $49.05. O C. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $49.05, when in fact the standard deviation of the bill is higher than $49.05. O D. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is different from $49.05. (c) Explain what it would mean to make a Type II error. Choose the correct answer below. A. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is $49.05. O B. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is different from $49.05. O C. The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from $49.05, when in fact the standard deviation of the bill is different from $49.05. O D. The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is higher than $49.05, when in fact the standard deviation of the bill is higher than $49.05.. . . Which of the following is the correct conclusion? O A. There is not sufficient evidence to conclude that the mean price of a single-family home has decreased. O B. There is not sufficient evidence to conclude that the mean price of a single-family home has not changed. O C. There is sufficient evidence to conclude that the mean price of a single-family home has not changed. O D. There is sufficient evidence to conclude that the mean price of a single-family home has decreased.The manufacturer of a certain engine treatment claims that if you add their product to your engine, it will be protected from excessive wear. An infomercial claims that a woman drove 3 hours without oil, thanks to the engine treatment. A magazine tested engines in which they added the treatment to the motor oil, ran the engines, drained the oil, and then determined the time until the engines seized. Complete parts (a) and (b) below. . .. (a) Determine the null and alternative hypotheses that the magazine will test. H (b) Both engines took exactly 12 minutes to seize. What conclusion might the magazine make based on this evidence? O A. The infomercial's claim is true. O B. The infomercial's claim is not true.Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the a = 0. 10 level of significance with 15 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the a = 0.01 level of significance based on a sample size of n = 10. (c) Determine the critical value(s) for a two-tailed test of a population mean at the a = 0. 10 level of significance based on a sample size of n = 16. Click here to view the t-Distribution Area in Right Tail. . . . (a) torit = V (Round to three decimal places as needed.) (b) torit V (Round to three decimal places as needed.) (c) torit= (Round to three decimal places as needed.)