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14. Suppose that you are testing the hypotheses Ho:p 0.40 vs. HA:p > 0.40. A sample...
14. Suppose that you are testing the hypotheses Ho:p 0.40 vs. HA:p0.40. A sample of size...
14. Suppose that you are testing the hypotheses Ho:p 0.40 vs. HA:p0.40. A sample of size 200 results in a sample proportion of 0.55. a) Construct a 90% confidence interval for p b) Based on the confidence interval, at a 05 can you re- ject Ho? Explain.
need help: Suppose that you are testing the hypotheses H0 με 16 vs. HA: μ< 16....
need help:
Suppose that you are testing the hypotheses H0 με 16 vs. HA: μ< 16. A sample of size 16 results in a sample mean of 15.5 and a sample standard deviation of 20 a) What is the standard error of the mean? b) What is the critical value of t* for a 90% confidence interval? c) Construct a 90% confidence interval for μ. d) Based on the confidence interval, at α#0.05 can you reject Ho? Explain. a) The...
Suppose that you are testing the hypotheses Ho: p= 0.20 vs. HA, p 0.20. A sample...
Suppose that you are testing the hypotheses Ho: p= 0.20 vs. HA, p 0.20. A sample of size 250 results in a sample proportion of 0.27 a) Construct a 95% confidence interval for p. b) Based on the confidence interval, can you reject Ho at a 0.05? Explain c) What is the difference between the standard error and standard deviation of the sample proportion? d) Which is used in computing the confidence interval? a) The 95% confidence interval for p...
Suppose that you are testing the hypotheses H0: μ=70 vs. HA: μ≠70. A sample of size...
Suppose that you are testing the hypotheses H0: μ=70 vs. HA: μ≠70. A sample of size 41 results in a sample mean of 65 and a sample standard deviation of 1.7. a) What is the standard error of the mean? b) What is the critical value of t* for a 99% confidence interval? c) Construct a 99% confidence interval for μ. d) Based on the confidence interval, at α=0.010 can you reject H0? Explain.
Suppose you are testing the hypotheses Ho : p=0.21 vs. p +0.21 with significance level a...
Suppose you are testing the hypotheses Ho : p=0.21 vs. p +0.21 with significance level a = 0.05. A sample size of 209 results in a sample proportion of 0.26. As you know, one way to address two-sided tests is to create confidence intervals. Construct the appropriate confidence interval for p that could be used to address the test and report the upper limit of the confidence interval. Note: 1- Only round your final answer to 2 decimal places. Enter...
Suppose that you are testing the hypotheses Upper H 0: p=0.38 vs. Upper H Subscript Upper...
Suppose that you are testing the hypotheses Upper H 0: p=0.38 vs. Upper H Subscript Upper A: p>0.38. A sample of size 250 results in a sample proportion of 0.45. a) Construct a 99% confidence interval for p. (__,__) b) Determine the conclusion for the hypothesis test based on the confidence interval. Since the confidence interval ▼ does does not contain the null hypothesis value, ▼ reject fail to reject the null hypothesis at alphaαequals=0.005. c) What is the difference...
Question 19 (1 point) Suppose you are testing the hypotheses Ho : p=0.22 vs. p +0.22 with significance level a = 0.05....
Question 19 (1 point) Suppose you are testing the hypotheses Ho : p=0.22 vs. p +0.22 with significance level a = 0.05. A sample size of 262 results in a sample proportion of 0.28. As you know, one way to address two-sided tests is to create confidence intervals. Construct the appropriate confidence interval for p that could be used to address the test and report the upper limit of the confidence interval. Note: 1- Only round your final answer to...
You wish to test the following claim (Ha) at a significance level of α=0.005. Ho:p=0.27 Ha:p>0.27...
You wish to test the following claim (Ha) at a significance level of α=0.005. Ho:p=0.27 Ha:p>0.27 You obtain a sample of size n=587 in which there are 168 successful observations. For this test, you should use the (cumulative) binomial distribution to obtain an exact p-value. (Do not use the normal distribution as an approximation for the binomial distribution.) The p-value for this test is (assuming Ho is true) the probability of observing... a) at most 168 successful observations b) at...
Exercises 10.3. Let Xi . . . , x N μ, σ2), whereơ2 s known to be equal to 100. In testing Ho : 25...
Exercises 10.3. Let Xi . . . , x N μ, σ2), whereơ2 s known to be equal to 100. In testing Ho : 25vs. H :H>25,h What sample size n would be necessary if one wishes to reject Ho with probability at least 95 if μ 26? iid se that a coin is to be tossed n times, and you wish to test the hypothesis Ho:p-12 VS. Hi P> I/2 at a- .05. What sample size n would be...
Suppose that you are testing the following hypotheses: Ho: = 10 and 11: > 10. If...
Suppose that you are testing the following hypotheses: Ho: = 10 and 11: > 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 sus 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the mean exceeds zero. If...
14. Suppose that you are testing the hypotheses Ho:p 0.40 vs. HA:p0.40. A sample of size 200 results in a sample proportion of 0.55. a) Construct a 90% confidence interval for p b) Based on the confidence interval, at a 05 can you re- ject Ho? Explain.
need help:
Suppose that you are testing the hypotheses H0 με 16 vs. HA: μ< 16. A sample of size 16 results in a sample mean of 15.5 and a sample standard deviation of 20 a) What is the standard error of the mean? b) What is the critical value of t* for a 90% confidence interval? c) Construct a 90% confidence interval for μ. d) Based on the confidence interval, at α#0.05 can you reject Ho? Explain. a) The...
Suppose that you are testing the hypotheses Ho: p= 0.20 vs. HA, p 0.20. A sample of size 250 results in a sample proportion of 0.27 a) Construct a 95% confidence interval for p. b) Based on the confidence interval, can you reject Ho at a 0.05? Explain c) What is the difference between the standard error and standard deviation of the sample proportion? d) Which is used in computing the confidence interval? a) The 95% confidence interval for p...
Suppose you are testing the hypotheses Ho : p=0.21 vs. p +0.21 with significance level a = 0.05. A sample size of 209 results in a sample proportion of 0.26. As you know, one way to address two-sided tests is to create confidence intervals. Construct the appropriate confidence interval for p that could be used to address the test and report the upper limit of the confidence interval. Note: 1- Only round your final answer to 2 decimal places. Enter...
Question 19 (1 point) Suppose you are testing the hypotheses Ho : p=0.22 vs. p +0.22 with significance level a = 0.05. A sample size of 262 results in a sample proportion of 0.28. As you know, one way to address two-sided tests is to create confidence intervals. Construct the appropriate confidence interval for p that could be used to address the test and report the upper limit of the confidence interval. Note: 1- Only round your final answer to...
Exercises 10.3. Let Xi . . . , x N μ, σ2), whereơ2 s known to be equal to 100. In testing Ho : 25vs. H :H>25,h What sample size n would be necessary if one wishes to reject Ho with probability at least 95 if μ 26? iid se that a coin is to be tossed n times, and you wish to test the hypothesis Ho:p-12 VS. Hi P> I/2 at a- .05. What sample size n would be...
Suppose that you are testing the following hypotheses: Ho: = 10 and 11: > 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 sus 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the mean exceeds zero. If...
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