can you help me with these questions?

Question 9 (1 point) A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 8 patients were recorded before administering the drug and after. The mean difference in total cholesterol levels (after - before) was 15.539 mg/dL with a standard deviation of 19.2612 mg/dL. Create a 90% confidence interval for the true average difference in cholesterol levels by the drug. Question 9 options: 1) (-2.6372, 28.4408) 2) (8.7291, 22.3489) 3) (13.6444, 17.4336) 4) (2.6372, 28.4408) 5) (2.8757, 28.2023) Question 10 (1 point) A student at a university wants to determine if the proportion of students that use iphones is less than 0.49. If the student conducts a hypothesis test, what will the null and alternative hypotheses be? Question 10 options: 1) Ho: p 0.49 5) Ho: p > 0.49 HA: p 5 0.49Question 11 (1 point) Your friend tells you that the proportion of active Major League Baseball players who have a batting average greater than .300 is less than 0.75, a claim you would like to test. The hypotheses for this test are Null Hypothesis: p 2 0.75, Alternative Hypothesis: p 101.44. You complete a randomized survey throughout the state and perform a one-sample hypothesis test for the mean, which results in a p-value of 0.7004. What is the appropriate conclusion? Conclude at the 5% level of significance. Question 12 options: 1) We did not find enough evidence to say the true average electric bill is less than $101.44. 2) We did not find enough evidence to say the true average electric bill is greater than $101.44. 3) The true average electric bill is less than or equal to $101.44. 4) We did not find enough evidence to say a significant difference exists between the true average electric bill and $101.44. 3) The true average electric bill is significantly greater than $101.44.Question 13 (1 point) You are interested in whether the average lifetime of Duracell AAA batteries is less than the average lifetime of Energizer AAA batteries. If Duracell is considered group 1 and Energizer group 2, what are the hypotheses for this test? Question 13 options: 1) Ho: HI > LL2 HA: HI S 12 2) Ho: 1 = 12 HA: HI # 12 3) Ho: HI S 12 HA: (1 > 412 4) Ho: HI H2. In a random sample of 29 sit down restaurants, you find that the average stock price is $239.107 with a standard deviation of $16.5558. For 50 fast food restaurants, the average stock price is $232.412 with a standard deviation of $5.1427. Conduct a two independent sample t-test. What is the test statistic and p-value for this test? Assume the population standard deviations are the same. Question 14 options: 1) Test Statistic: 2.657, P-Value: 0.9952 2) Test Statistic: -2.657, P-Value: 0.9952 3) Test Statistic: -2.657, P-Value: 0.0048 4) Test Statistic: 2.657, P-Value: 0.0096 5) Test Statistic: 2.657, P-Value: 0.0048Question 15 (1 point) It is believed that students who begin studying for final exams a week before the test score differently than students who wait until the night before. Suppose you want to test the hypothesis that students who study one week before score different from students who study the night before. A hypothesis test for two independent samples is run based on your data and a p-value is calculated to be 0.0199. What is the appropriate conclusion? Question 15 options: 1) The average score of students who study one week before a test is significantly different from the average score of students who wait to study until the night before a test. 2) We did not find enough evidence to say a significant difference exists between the average score of students who study one week before a test and the average score of students who wait to study until the night before a test. 3) The average score of students who study one week before a test is significantly less than the average score of students who wait to study until the night before a test. 4) The average score of students who study one week before a test is equal to the average score of students who wait to study until the night before a test. 5) The average score of students who study one week before a test is significantly greater than the average score of students who wait to study until the night before a test.Question 16 (1 point) A medical researcher wants to examine the relationship of the blood pressure of patients before and after a procedure. She takes a sample of people and measures their blood pressure before undergoing the procedure. Afterwards, she takes the same sample of people and measures their blood pressure again. The researcher wants to test if the blood pressure measurements after the procedure are different from the blood pressure measurements before the procedure. The hypotheses are as follows: Null Hypothesis: Up = 0, Alternative Hypothesis: Up * 0. From her data, the researcher calculates a p-value of 0.8011. What is the appropriate conclusion? The difference was calculated as (after - before). Question 16 options: 1)We did not find enough evidence to say there was a significantly negative average difference in blood pressure 2) We did not find enough evidence to say the average difference in blood pressure was not 0. 3) The average difference in blood pressure is significantly different from 0. The blood pressures of patients differ significantly before and after the procedure. 4) The average difference in blood pressure is equal to 0. 5) We did not find enough evidence to say there was a significantly positive average difference in blood pressure. Question 17 (1 point) Consumers Energy states that the average electric bill across the state is $46.83. You want to test the claim that the average bill amount is actually less than $46.83. The hypotheses for this situation are as follows: Null Hypothesis: H 2 46.83, Alternative Hypothesis: u