12. What is one way to increase the length of any confidence interval? (a) Increase the...
2. When calculating confidence interval, if you want a wider interval do you: which of the option is correct a) Increase the confidence level. b) Decrease the confidence level . c) Increase the sample size. d) Decrease the sample size.
What is the t-value for a 90% confidence interval for the mean if the sample size is 24? a. 1.984 b. 1.714 c. 2.069 d. 1.96 e. 2.306 In general, when choosing the sample size for estimating a mean, which of the following will result in a smaller margin of error (E)? a. a larger confidence level b. a smaller sample size c. a dozen glazed donuts d. a larger sample size e. a more expensive calculator
D5: What happens to the width of your confidence interval as you increase your sample size? a. Why does this happen? b. Provide a real world example that explains this concept. c. Find an example in your homework this week that illustrates increasing the sample size and how it changes the width of the confidence level. Provide both the question statement and the solution.
17. If the confidence level for a confidence interval is 98%. then the error rate α is ______. a. 98% b. 2% c. 95% d. 5% 18. Suppose the sample mean is μ and the confidence interval for population mean is (μ-E, μ+E). E will be getting smaller if: (18.a) the sample size is getting ___________; a. smaller b. larger (18.b) the standard deviation of the data in the sample is __________; a. smaller b. larger (18.c) the allowed error...
QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate while holding sample size constant, we can expect a. the width of the confidence interval to increase. b. the width of the confidence interval to decrease. c. the width of the confidence interval to remain the same. d. the sample size to increase. QUESTION 22 Which one of the following is a correct statement about the probability distribution of a t random variable? a....
What will happen to the length of a confidence interval if the sample proportion is increased? a unable to tell b increase the length c decrease the length d stay the same
QUESTION 12 "If you wish to decrease the width of a confidence interval, you may do which one of the following: " Reduce sample size. Reduce the size of the population. Decrease the level of confidence. Both b and c
1. Which of the following will increase the value of the power in a statistical test of hypotheses? (a) Increase the Type II error probability. (b) Increase the sample size. (c) Reject the null hypothesis only if the P-value is smaller than the level of significance. (d) All of the above 2. A significance test gives a P-value of 0.023. This means that the result is statistically significant at (a) both the 0.01 and the 0.05 levels. (b) neither the...
Suppose you construct a 96% confidence interval for a population mean from a normal distribution with known . Scenario 1: If you increase the size of the sample while keeping the same 95% level of confidence, how would your confidence interval be affected? Circle answer. a. would be wider b. would be narrower c. there would be no change d. no way to know without additional information Scenario 2: If you increase the level of confidence from 96% to 99%...
Answer and explain. If all other quantities remain the same, what will happen to the width of a confidence interval if there is an increase in the:confidence level;sample size; andstandard deviation