Let u denote the true average reaction time to a certain stimulus. For a z test of Ho: H = 5 versus H: > 5, determine the P-value for each of the following values of the z test statistic. (Round y answers to four decimal places.) In USE SALT (а) 1.41 0.0793 (b) 0.96 (c) 1.96 (d) 2.42

A runner states that his average time for running a mile is 6.5 minutes.  Given the following times from 8 recent mile runs, test the claim that his  actual average is not what he states it to be at the a = 0.05 level of  significance.  6.25    6.6    6.8    7.2    6.3    7.0    6.5    6.75

The sodium content of 30 packages of 300 grams of corn flakes of a certain brand was examined. The data in milligrams: the mean is 129.753 and s = 0.929: (a) Can the assertion that the sodium content of this brand of cereal is different from 130 mg be supported? Use = 0.5, find the p-value. b) Calculate the power of the test if the true average sodium is 130.5 mg. c) What sample size would be required to detect a true average sodium content of 130.1 if we want the power to be at least 0.75?   Note:The exercise in the image is in Spanish, which is the original, to make it easier to understand.

A study done in 1997 showed that 4.2% of mothers smoked cigarettes during their pregnancy. An obstetrician feels that this percentage is higher now. To test this, the obstetrician takes a sample of 200 mothers and finds that 10 of them smoked during their pregnancy. Test the obstetrician's claim at the a=0.05 level of significance. Write your answer in the following form P-Value, Conclusion Example: 0.15, There is not sufficient evidence that the mean weight of pandas is less than 200 pounds. Edit View Insert Format Tools Table 12pt v Paragraph v BIUA e T?u 画① O words ņ V12 96 5n SO F H. B N2

q-1

A researcher reports t(26) = 2.71 for a two independent samples t-test. How many participants were in the entire experiment? a. 28 b. 27 c. 30 d. cannot determine with the information provided

In a test of H0: p = 0.40 against Ha: p # 0.40, the sample data yield the test statistics z = 1.78. Find the p-value for this test. Round your answer to 4 decimal places.

Use the data below to answer the question Group1 (n=16) averaged 27.31 jumps (SD=10.18) in a physical exam and Group 2 (n=11) averaged 11.91 jumps (SD=9.74). What is the obtained value for the t-statistic from the data above? 2.66 O O O O 15.4 3.96 2.74