When testing the hypotheses H0: p = 0.60 and Ha: p > 0.60, you check that the normal is appropriate by showing that
a. p 10
b. you have a random sample
c. n 30 OR NPP P-value > .05
d. n(0.60)(1 – 0.60) 10
When testing the hypotheses H0: p = 0.60 and Ha: p > 0.60, you check that...
When creating a confidence interval for a numerical variable, you check that the “t-curve” is appropriate to use by showing that a. you have a random sample b. n >= 30 OR NPP P-value > .05 c. n >= 10 d. np(1 – p) >= 10
Suppose that you are testing the hypotheses Upper H0: p=0.33 vs. HA: p>0.33 A sample of size150 results in a sample proportion of 0.39 a) Construct a 99% confidence interval for p. b) Based on the confidence interval, can you reject H0 at αequals=0.005?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?
Suppose you are testing the hypotheses H0: μd = 0 and Ha: μd ≠ 0 in a paired-design and obtain a p-value of 0.21. Which one of the following could be a possible 95% confidence interval for μd? A) 4.50 to 6.90 B) 1.50 to 3.80 C) -1.20 to .90 D) -2.30 to -.70
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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...
Consider the following hypotheses: H0: p ≥ 0.38 HA: p < 0.38 Compute the p-value based on the following sample information. (You may find it useful to reference the appropriate table: z table or t table) (Round "z-value" to 2 decimal places. Round intermediate calculations to at least 4 decimal places and final answers to 4 decimal places.) p-value a. x = 22; n = 74 b. x = 110; n = 300 c. p¯ = 0.34; n = 50...
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.
Consider the following hypotheses: H0: p ? 0.38 HA: p < 0.38 Compute the p-value based on the following sample information a. x = 22; n = 74 b. x = 110; n = 300 c. pbar = 0.34; n = 50 d. pbar = 0.34; n = 400
Consider a large-sample level 0.01 test for testing H0: p = 0.2 against Ha: p > 0.2. (a) For the alternative value p = 0.21, compute β(0.21) for sample sizes n = 100, 1600, 10,000, 40,000, and 90,000. (Round your answers to four decimal places.) n β 100 1600 10,000 40,000 90,000 (b) For p̂ = x/n = 0.21, compute the P-value when n = 100, 1600, 10,000, and 40,000. (Round your answers to four decimal places.) n P-value 100...
We are interested in testing the following hypotheses. H0: P1- P2 ³ 0, Ha: P1- P2 < 0. The test statistic Z is computed to be 0.58. The p-value for this test is A. 0.2810 B. 0.7190 C. 0.5620 D. 0.5800
Suppose that when data from an experiment was analyzed, the P-value for testing H0: μ = 50 versus Ha: μ > 50 was calculated as .0244. Which of the following statements are true? A. H0 is not rejected at .05 level B. H0 is not rejected at .025 level C. H0 is rejected at any level α D. H0 is rejected at .10 level