1) A 95% confidence interval for the mean blood pressure for a target population
ID: 3299702 • Letter: 1
Question
1) A 95% confidence interval for the mean blood pressure for a target population is (122.2 - 127.8), based on a random sample. What is the sample mean estimate of the mean blood pressure for the same population?
a) 122.2
b) 127.8
c) 125
d) 5.6
e) 2.8
2) Analysis of a random sample of 250 Virginia nurses produced a 95% confidence interval for the mean annual salary of $42,838 to $49,691.What of the following is a correct way to interpret this confidence interval? There may be more than one correct answer.
a) If we took many random samples of Virginia nurses, about 95% of them would contain the true mean salary for Virginia nurses.
b) About 95% of Virginia nurses earn between $42,838 and $49,691.
c) About 95% of the nurses surveyed earn between $42,838 and $49,691.
d) 95% of all nurses earn between $42,838 and $49,691.
e) We are 95% confident that the true mean salary of all Virginia nurses is inside the interval from $42,838 to $49,691.
3) Which of the following would be an appropriate null hypothesis?
a) The population mean is equal to 3.4.
b) The sample mean is greater than 3.4.
c) The sample mean is smaller than 3.4.
d) The population mean is not equal to 3.4.
e) The sample mean is equal to 3.4.
4) Which p-value provides the strongest evidence against the null hypothesis?
a) -0.05
b) 0.05
c) 1
d) 0.99
e) 0.001
5) Which of the following statements is false?
a) The smaller the p-value, the stronger the evidence is against Ho.
b) The p-value represents the probability of obtaining the observed value or one even more extreme under the null hypothesis.
c) The p-value is between 0 and 1.
d) The p-value assumes HA is true.
Please try to finish it as soon as possible, thanks so much!
Explanation / Answer
1. Sample mean = (122.2 + 127.8)/2 = 125
Option C is correct.
2. Options a and e are correct.
3. Option a is correct.
4. Option e is correct.
5. Option d is correct.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.