In a one-sample z test, the smaller the P-value,
Select one:
a. the stronger the evidence to reject the null hypothesis
b. the narrower the width of the 95% confidence interval
c. the wider the width of the 95% confidence interval
d. the stronger the evidence to reject the alternative
hypothesis
In one sample z test, the smaller the P-value, the stronger the evidence to reject the null hypothesis.
Option A is correct.
In a one-sample z test, the smaller the P-value, Select one: a. the stronger the evidence...
In a sample of credit card holders the mean monthly value of credit card purchases was $ 400 and the sample variance was 67 ($ squared). Assume that the population distribution is normal. Answer the following, rounding your answers to two decimal places where appropriate. (a) Suppose the sample results were obtained from a random sample of 12 credit card holders. Find a 95% confidence interval for the mean monthly value of credit card purchases of all card holders. ( , )...
For each problem, select the correct response. (a) What is the P-value of a test of the null hypothesis? A. The probability the null hypothesis is false B. The probability, assuming the null hypothesis is false, that the test statistic will take a value at least as extreme as that actually observed C. The probability the null hypothesis is true D. The probability, assuming the null hypothesis is true, that the test statistic will take a value at least as...
The value obtained for the test statistic, z, in a one-mean 2-test is given. Whether the test is two tailed, left tailed, or right tailed is also specified. For parts (a) and (b). determine the P-value and decide whether, at the 1% significance level, the data provide sufficient evidence to reject the null hypothesis in favor of the alternative hypothesis. a. The test statistic in a two-tailed test is z= -1.42. The P-value is (Round to three cocimal places as...
INFERENCES ABOUT THE POPULATION MEAN DISTINGUISH BETWEEN Z-TEST AND T-TEST. 1. A GROUP OF 9 STORE MANAGERS WAS DRAWN FOR ANALYSIS OF THEIR IQ SCORES. ASSUME THAT INDIVIDUAL SCORES ARE NORMALLY DISTRIBUTED, WITH THE UNKNOWN POPULATION AVERAGE AND POPULATION STANDARD DEVIATION OF 15. SAMPLE SUMMARIES WERE: (SAMPLE MEAN) = 88.2 AND (SAMPLE STANDARD DEVIATION) = 12. (A) AT THE 1% SIGNIFICANCE LEVEL, DO WE HAVE SUFFICIENT EVIDENCE THAT THE POPULATION AVERAGE IQ WAS BELOW 100? CIRCLE ONE: YES! || NO!...
Researcher A obtained a P-value of 0.08, and researcher B obtained a P-value of 0.04. Whose results are more statistically significant? Select one: a. Researcher B b. Researcher A Explain why the researcher's P-value was more statistically significant. 7 А" B IF ! If the confidence level was raised to 98%, but the sample data stayed the same, what would happen to the confidence interval? Select one: a. It is impossible to tell. b. It would stay the same. c....
A one-sample z-test for a population mean is to be performed. True or false: The larger the P-value, the stronger the evidence against the null hypothesis?
In order to compare the means of two populations, independent random samples of 400 observations are selected from each population, with the results found in the table to the right. Complete parts a through e below. Sample 1 overbar x = 5,305 s1= 154 Sample 2 overbar x = 5,266 s2 = 199 a. Use a 95% confidence interval to estimate the difference between the population means (mu 1 - mu 2). Interpret the confidence interval. The confidence interval is...
The test statistic in a two-tailed test is z=0.34 Determine the P-value and decide whether, at the 10% significance level, the data provide sufficient evidence to reject the null hypothesis in favor of the alternative hypothesis. LOADING... Click here to view a partial table of areas under the standard normal curve. The P-value is nothing. (Round to four decimal places as needed.) This P-value ▼ sufficient evidence to reject the null hypothesis in favor of the alternative hypothesis because it...
For a one-tailed hypothesis test (upper tail) the p-value is computed to be 0.034. If the test is being conducted at 95% confidence, the null hypothesis Select one: a. is rejected. b. is not rejected. c. could be rejected or not rejected depending on the value of the mean of the sample. d. could be rejected or not rejected depending on the sample size.
QUESTION The the p-value, the stronger the evidence against the null hypothesis. smaller larger QUESTION 7 Assume that you plan to use a si ficance level of 0.05 to test the dam that the pooled estimate Round your answer to the nearest thousandth n = 100 m2 100 use the even t s and number 0.305 0.479 0.392 0.435 Chal Save and submit to see and subclict e Type here to search ASDFGHJK N