QUESTION 8 In the situation described in Question 7, if we want to test this claim...

Transcribed Image Text:

QUESTION 8 In the situation described in Question 7, if we want to test this claim about the mean time spent by Americans per day on social media - or - what would our Alternative Hypothesis be in terms of ? > 2.3 hrs =2.3 hrs O <2.3 hrs < 2.3 hrs 2.3 hrs > 2.3 hrs QUESTION 9 In the situation described in Question 7, what would the value of our z-statistic be? Round your answer to two decimal places. QUESTION 10 In the situation described in Question 7 and using the Standard Normal Table, what would the P-value of our z-statistic be? Use your answer to Question 9 rounded to two decimal places and round your answer to four decimal places. QUESTION 11 In the situation described in Question 7 and using the t Table, what would the interval for the P-value of our z-statistic be? Use your answer to Question 9 rounded to two decimal places. O 0.2 P <0.3 O 0.1 QUESTION 1 Doctors recommend having a total cholesterol level below 200 mg/dL and consider anything greater than that value to be too high. Suppose that the population standard deviation of cholesterol level among all people is 64 mg/dL and that a sample of 36 people is taken whose mean cholesterol level is 225 mg/dL. If we were looking for evidence that the population mean cholesterol level - or - is too high, what would our Null Hypothesis be in terms of ? =225 mg/dL =200 mg/dL <225 mg/dL > 200 mg/dL QUESTION 2 In the situation described in Question 1, If we were looking for evidence that the population mean cholesterol level - or - is too high, what would our Alternative Hypothesis be in terms of ? =225 mg/dL =200 mg/dL <225 mg/dL >200 mg/dL QUESTION 3 In the situation described in Question 1, what would the value of our z-statistic be? Round yoru answer to two decimal places. QUESTION 4 In the situation described in Question 1 and using the Standard Normal Table, what would the P-value of our z-statistic be? Use your answer to Question 3 rounded to two decimal places and round your answer to four decimal places. QUESTION 5 In the situation described in Question 1 and using the t Table, what would the interval for the P-value of our z-statistic be? Use your answer to Question 3 rounded to two decimal places. O 0.01 < P < 0.02 0.005 P < 0.01 0.2 P <0.25 0.01 < P < 0.25 QUESTION 6 If we were using a significance level of a = 0.01 for the situation described in Question 1, what should our conclusion be? We have evidence that the mean cholesterol level of people is equal to what was hypothesized. We have evidence that the mean cholesterol level of people is greater than what was hypothesized. We have no evidence that the mean cholesterol level of people is equal to what was hypothesized. We have no evidence that the mean cholesterol level of people is greater than what was hypothesized. QUESTION 7 Suppose that someone claims that the average time per day that Americans spend on social media is 2.3 hrs and that we know that the population standard deviation of how long Americans spend on social media per day is 0.8 hrs. Suppose also that we draw a sample of 80 U.S. citizens from the overall population that has a mean of 2.2 hrs. If we want to test this claim about the mean time spent by Americans per day on social media - or - what would our Null Hypothesis be in terms of ? =2.3 hrs > 2.3 hrs <2.3 hrs > 2.3 hrs 2.3 hrs 2.3 hrs QUESTION 8 In the situation described in Question 7, if we want to test this claim about the mean time spent by Americans per day on social media - or - what would our Alternative Hypothesis be in terms of ? > 2.3 hrs =2.3 hrs O <2.3 hrs < 2.3 hrs 2.3 hrs > 2.3 hrs QUESTION 9 In the situation described in Question 7, what would the value of our z-statistic be? Round your answer to two decimal places. QUESTION 10 In the situation described in Question 7 and using the Standard Normal Table, what would the P-value of our z-statistic be? Use your answer to Question 9 rounded to two decimal places and round your answer to four decimal places. QUESTION 11 In the situation described in Question 7 and using the t Table, what would the interval for the P-value of our z-statistic be? Use your answer to Question 9 rounded to two decimal places. O 0.2 P <0.3 O 0.1 QUESTION 1 Doctors recommend having a total cholesterol level below 200 mg/dL and consider anything greater than that value to be too high. Suppose that the population standard deviation of cholesterol level among all people is 64 mg/dL and that a sample of 36 people is taken whose mean cholesterol level is 225 mg/dL. If we were looking for evidence that the population mean cholesterol level - or - is too high, what would our Null Hypothesis be in terms of ? =225 mg/dL =200 mg/dL <225 mg/dL > 200 mg/dL QUESTION 2 In the situation described in Question 1, If we were looking for evidence that the population mean cholesterol level - or - is too high, what would our Alternative Hypothesis be in terms of ? =225 mg/dL =200 mg/dL <225 mg/dL >200 mg/dL QUESTION 3 In the situation described in Question 1, what would the value of our z-statistic be? Round yoru answer to two decimal places. QUESTION 4 In the situation described in Question 1 and using the Standard Normal Table, what would the P-value of our z-statistic be? Use your answer to Question 3 rounded to two decimal places and round your answer to four decimal places. QUESTION 5 In the situation described in Question 1 and using the t Table, what would the interval for the P-value of our z-statistic be? Use your answer to Question 3 rounded to two decimal places. O 0.01 < P < 0.02 0.005 P < 0.01 0.2 P <0.25 0.01 < P < 0.25 QUESTION 6 If we were using a significance level of a = 0.01 for the situation described in Question 1, what should our conclusion be? We have evidence that the mean cholesterol level of people is equal to what was hypothesized. We have evidence that the mean cholesterol level of people is greater than what was hypothesized. We have no evidence that the mean cholesterol level of people is equal to what was hypothesized. We have no evidence that the mean cholesterol level of people is greater than what was hypothesized. QUESTION 7 Suppose that someone claims that the average time per day that Americans spend on social media is 2.3 hrs and that we know that the population standard deviation of how long Americans spend on social media per day is 0.8 hrs. Suppose also that we draw a sample of 80 U.S. citizens from the overall population that has a mean of 2.2 hrs. If we want to test this claim about the mean time spent by Americans per day on social media - or - what would our Null Hypothesis be in terms of ? =2.3 hrs > 2.3 hrs <2.3 hrs > 2.3 hrs 2.3 hrs 2.3 hrs