95% confidence interval for p is
- Z/2 * sqrt [ ( 1 - ) / n ] < p < + Z/2 * sqrt [ ( 1 - ) / n ]
0.28 - 1.96 * sqrt [ 0.28 * ( 1 - 0.28) / 262] < p < 0.28 + 1.96 * sqrt [ 0.28 * ( 1 - 0.28) / 262]
0.23 < p < 0.33
Upper limit = 0.33
Question 19 (1 point) Suppose you are testing the hypotheses Ho : p=0.22 vs. p +0.22 with significance level a = 0.05....
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 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 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...
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.
14. Suppose that you are testing the hypotheses Ho:p 0.40 vs. HA:p > 0.40. 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 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...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and H :> 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 <u< 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the...
Question: Should H0 be rejected? Use the p-value and a level of significance of 0.05 to justify your answer. Use the above data to construct a 95% confidence interval for p1 - p2 Consider this hypothesis test: H0: p1 - p2 = 0 Ha: p1 - p2 > 0 Here p1 is the population proportion of “yes” of Population 1 and p2 is the population proportion of “yes” of Population 2. Use the statistics data from a simple random sample...
QUESTION # 1 A random sample of 5,280 permanent dwellings on an entire reservation showed that 1,634 were traditional hogans. (a)Let p be the proportion of all permanent dwellings on the entire reservation that are traditional hogans. Find a point estimate for p. (Round your answer to four decimal places.) (b)Find a 99% confidence interval for p. (Round your answer to three decimal places.) lower limit upper limit QUESTION #2 A random sample of 5,100 permanent dwellings on an entire...