Homework Answers
Test statistic,
t = (xbar - mu)/(s/sqrt(n))
t = (19.25 - 20)/(2.5/sqrt(100))
t = -3
P-value Approach
P-value = 0.0026
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In a hypothesis testing problem a researcher wants to test the hypothesis Ho 20 versus Ha...
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In a test of the hypothesis Ho: u = 59 versus Ha: u>59, a sample of n = 100 observations possessed mean x = 58.5 and standard deviation s = 3.8. Find and interpret the p-value for this test. The p-value for this test is (Round to three decimal places as needed.)
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{Exercise 9.09 (Algorithmic).} Consider the following hypothesis test: Ho: u 20 Ha: p < 20 A...
{Exercise 9.09 (Algorithmic).} Consider the following hypothesis test: Ho: u 20 Ha: p < 20 A sample of 40 provided a sample mean of 19.6. The population standard deviation is 1.8. a. Compute the value of the test statistic (to 2 decimals). -1.64 b. What is the p-value (to 3 decimals)? -1.757 X c. Using a = .05, can it be concluded that the population mean is less than 20? No d. Using a = .05, what is the critical...
Question 21 In testing Ho: p1" p,-0 versus Ha: p1" p. 0, the computed value of...
Question 21 In testing Ho: p1" p,-0 versus Ha: p1" p. 0, the computed value of the test statistic is z = 2 25 The P value for this two-tailed test is then Not yet answered Points out of 6.00 Flag question Question 22 Not yet answered Points out of 4.00 The two-sample t test is applicable in situations in which population distributions are both normal when population variances have unknown values, and at least one of the two sample...
help please !! To test Ho: 0 = 2.3 versus H: > 2.3, a random sample...
help please !!
To test Ho: 0 = 2.3 versus H: > 2.3, a random sample of size n=20 is obtained from a population that is known to be normally distributed. (a) If the sample standard deviation is determined to be s 3.1. compute the test statistic (b) of the researcher decides to test this hypothesis at the a= 0.05 level of significance, use technology to determine the P-value. (c) Will the researcher reject the null hypothesis? (a) The test...
Suppose the null hypothesis is Ho : µ = 500 against Ha : > µ =...
Suppose the null hypothesis is Ho : µ = 500 against Ha : > µ = 500 , and the significance level for this testing is 0.05. The population in question is normally distributed with standard deviation 100. A random sample of size n=25 will be used. If the true alternative mean is 550, then the probability of committing the type II error is ____.
3, Hypothesis testing for the mean (gis known) Find the P-value for a two-tailed hypothesis test with a standardized test statistic of z 1.64. Decide whether to reject Ho when the level of signif...
3, Hypothesis testing for the mean (gis known) Find the P-value for a two-tailed hypothesis test with a standardized test statistic of z 1.64. Decide whether to reject Ho when the level of significance is α a. 0.10. b. Find the P-value for a right-tailed hypothesis test with a standardized test statistic of z 1.64. Decide whether to reject Ho when the level of significance is a0.10. Homeowners claim that the mean speed of automobiles traveling on their street is...
5. Consider testing the hypothesis Ho : p = 0.5 vs. Ha : pメ0.5 using two...
5. Consider testing the hypothesis Ho : p = 0.5 vs. Ha : pメ0.5 using two tests, both at the same level of significance. The first test, Tl, requires a sample of size 45 while the second test, T2, requires a sample of size 100 for their power functions to be equal at the particular alternative p 0.3. What is the efficiency of T2 relative to T1? Ffficiency (ARE) of test Tı relative to test T2 is 0.3 and the
Suppose we are testing the null hypothesis Ho: mu = 20 and the alternative Ha: mu...
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To test Ho: σ=4.6 versus H1: σ≠4.6, a random sample of size n=11 is obtained from...
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In a test of the hypothesis Ho: u = 59 versus Ha: u>59, a sample of n = 100 observations possessed mean x = 58.5 and standard deviation s = 3.8. Find and interpret the p-value for this test. The p-value for this test is (Round to three decimal places as needed.)
{Exercise 9.09 (Algorithmic).} Consider the following hypothesis test: Ho: u 20 Ha: p < 20 A sample of 40 provided a sample mean of 19.6. The population standard deviation is 1.8. a. Compute the value of the test statistic (to 2 decimals). -1.64 b. What is the p-value (to 3 decimals)? -1.757 X c. Using a = .05, can it be concluded that the population mean is less than 20? No d. Using a = .05, what is the critical...
Question 21 In testing Ho: p1" p,-0 versus Ha: p1" p. 0, the computed value of the test statistic is z = 2 25 The P value for this two-tailed test is then Not yet answered Points out of 6.00 Flag question Question 22 Not yet answered Points out of 4.00 The two-sample t test is applicable in situations in which population distributions are both normal when population variances have unknown values, and at least one of the two sample...
help please !!
To test Ho: 0 = 2.3 versus H: > 2.3, a random sample of size n=20 is obtained from a population that is known to be normally distributed. (a) If the sample standard deviation is determined to be s 3.1. compute the test statistic (b) of the researcher decides to test this hypothesis at the a= 0.05 level of significance, use technology to determine the P-value. (c) Will the researcher reject the null hypothesis? (a) The test...
3, Hypothesis testing for the mean (gis known) Find the P-value for a two-tailed hypothesis test with a standardized test statistic of z 1.64. Decide whether to reject Ho when the level of significance is α a. 0.10. b. Find the P-value for a right-tailed hypothesis test with a standardized test statistic of z 1.64. Decide whether to reject Ho when the level of significance is a0.10. Homeowners claim that the mean speed of automobiles traveling on their street is...
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