
Question 9 2.5 pts Consider the following hypothesis test: H: H: 25 > 25 A sample...
Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 55 provided a sample mean of 19.6. The population standard deviation is 1.6. a. Compute the value of the test statistic (to 2 decimals). If your answer is negative, use minus "-" sign. b. What is the p-value (to 3 decimals)? c. Using = .05, can it be concluded that the population mean is less than 20? d. Using = .05, what is the critical...
Consider the following hypothesis test: H 0: = 15 H a: 15 A sample of 40 provided a sample mean of 14.33. The population standard deviation is 7. a. Compute the value of the test statistic (to 2 decimals). (If answer is negative, use minus “-“ sign.) -0.60 b. What is the p-value (to 4 decimals)? -1.2105 c. Using = .05, can it be concluded that the population mean is not equal to 15? Answer the next three questions using...
Question 8 1 pts Suppose we are conducting a hypothesis test to see if the average number of M&Ms one person can eat before getting sick has decreased. We calculate our test statistic on the z-table to be -1.75. Do we reject or fail to reject Ho ata = .05? O Fail to reject; the average does not seem to have fallen O Reject; the average seems to have fallen O Reject: the average does not seem to have fallen...
Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 60 provided a sample mean of 19.6. The population standard deviation is 1.8. a. Compute the value of the test statistic (to 2 decimals). If your answer is negative, use minus "-" sign. b. What is the p-value (to 3 decimals)? c. Using = .05, can it be concluded that the population mean is less than 20? d. Using = .05, what is the critical...
Question-1: Consider the following hypothesis test: ?0: ? ≤ 3 ?1: ? > 3 A sample of 40 provided a sample mean of 26.4. The population standard deviation is 6. Compute the value of the test statistic. What is the p-value? At α = .01, what is your conclusion? What is the rejection rule using the critical value? What is your conclusion?
Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 60 provided a sample mean of 19.5. The population standard deviation is 2. a. Compute the value of the test statistic (to 2 decimals). If your answer is negative, use minus "-" sign. b. What is the p-value (to 3 decimals)? c. Using = .05, can it be concluded that the population mean is less than 20? SelectYesNoItem 3 d. Using = .05, what is the critical value for...
Question 6 2.5 pts A statistics professor believes that his students are above average intelligence. To test this, he collects a random sample of 50 of his students' IQ scores and finds a sample mean of 110. Knowing that the mean population IQ is 100 with a standard deviation of 15, he calculates a z of x-bar test statistic of 4.72. Based on this information, what statistical decision should this professor come to? O Fail to reject the null, because...
Consider the following hypothesis test. Hoius 12 H: > 12 A sample of 25 provided a sample mean x = 14 and a sample standard deviation s = 4.25. (a) Compute the value of the test statistic. (Round your answer to three decimal places.) (b) Use the t distribution table to compute a range for the p-value. O p-value > 0.200 O 0.100 < p-value < 0.200 O 0.050 < p-value < 0.100 O 0.025 < p-value < 0.050 O...
Consider the following hypothesis test: H_0: µ >= 80 H_a: µ < 80 A sample of size 100 provided a sample mean of 78.5. The population standard deviation is 12. a) Compute the value of the test statistic b) What is the associated p-value? c) Using α = 0.01, what is your conclusion? Enter either "reject" or "fail to reject" without the quotes for what to do with the null hypothesis.
Consider the following hypothesis test: H_0: µ <= 50 H_a: µ > 50 A sample of size 60 provided a sample mean of 51.8. The population standard deviation is 8. a) Compute the value of the test statistic, rounding all calculations to 2 decimal places. b) What is the associated p-value? c) Using α = 0.05, what is your conclusion? Enter either "reject" or "fail to reject" without the quotes for what to do with the null hypothesis.