Question 7 (1 point) In general, the average heartrate of all patients is 99 with a standard deviation of 17 0524. A new cardiovascular medication was administered to a single group of subjects. The subjects' heartrates (bpm) were recorded above after the medication was administered. The standard deviation of the sampled heartrates was 20 0309. Based on this information, the sample mean is expected to be - , give or take - A)Expected to be 102.2857, give or take 7.571. B)Expected to be 99, give or take 6.4452. C) Expected to be 102 2857, give or take 20.0309 D ) Expected to be 102.2857, give or take 170524 Question : (1 point) Which of the following statements is true? A. The standard enor of the sample mean depends on the population mean B. The expected value of the sample mean decreases with the sample size. C. The standard error of the sample proportion increases with the sample size. D. The expected value of the sample proportion stays the same when the sample size decreases, Question 9 (1 point) Which of the following statements is true? A ) The expected value of the sample mean stays the same when the sample size increases. B ) The standard enor of the sample proportion stays the same when the sample size changes C) The standard enor of the sample mean's sampling distribution has the sample standard deviation in its formula. D) The expected value of the sample mean decreases when the sample size increases Question 10 (1 point) A statistician estimates the population proportion of residents in Michigan that are vaccinated, and calculates a confidence interval of (0.415, 0.785). What is the correct interpretation of this confidence interval? A. We are 95% certain that the population proportion is between 0.415 and 0.785 A) We are 95% confident that the population proportion is between 0.415 and 0-785 B) We are 95% confident that the sample proportion is between 0.415 and 0.785 C) We are 95% certain that the sample proportion is between 0 415 and 0.785 Question 11 (1 point) A statistician hypothesizes that the population proportion of residents in Michigan that are vaccinated is 0.29, and calculates a confidence interval of (-0.001, 0 201). Based on this information, we may conclude that the population proportion is .. the hypothesized proportion. A) lower than B) Can't determine. C) not significantly different to Question 12 (1 point) A statistician estimates the population mean of the height of all US citizens, and calculates a confidence