Question

Hypothesis testing is a statistical procedure for assessing claims about parameters or statistics? a. parameters b. statistics

QUESTION 2 A claim made about a parameter is called the _____ hypothesis. a. alternative b. null

QUESTION 3 The statement that you want to find statistical evidence for is the _____ hypothesis. a. alternative b. null

QUESTION 4 If statistical evidence is found against the null hypothesis, then we _____ the null hypothesis. a. fail to reject b. reject

QUESTION 5 Suppose the null hypothesis is H subscript 0 : space mu equals 100. Which sample result would be the best indicator that the null hypothesis is false? a. top enclose x space equals 105 b. top enclose x equals 97 c. top enclose x equals 120

QUESTION 6 A t-test is used to test hypotheses for the population mean mu. A random sample of 25 is selected for the analysis. How many degrees of freedom would be used for the test?

QUESTION 7 A t-test is used to test the null hypotheses H subscript 0 : mu equals 100. A random sample of 25 values gave a sample mean top enclose x = 110 and a sample standard deviation s = 20. What is the value of the t test statistic? a. -2.5 b. 2.5 c. 12.5 d. 0.08

QUESTION 8 A test of hypotheses is carried out at the alpha = 0.05 level. The P-value for the applied test is calculated to be 0.08. The decision is made to reject the null hypothesis. The correct decision is made in this case? True False

Answer 1

QUESTION 2 Hypothesis testing is a statistical procedure for assessing claims about parameters or statistics? a. parameters

QUESTION 2 A claim made about a parameter is called the _____ hypothesis. b. null

QUESTION 3 The statement that you want to find statistical evidence for is the _____ hypothesis. b. null

QUESTION 4 If statistical evidence is found against the null hypothesis, then we _____ the null hypothesis. b. reject

QUESTION 5 Suppose the null hypothesis is H subscript 0 : space mu equals 100. Which sample result would be the best indicator that the null hypothesis is false? b. top enclose x equals 97
(Note sure about this question, as option say "top enclose", unable to understand this.)

QUESTION 6 A t-test is used to test hypotheses for the population mean mu. A random sample of 25 is selected for the analysis. How many degrees of freedom would be used for the test? df = n-1 = 25-1 = 24

QUESTION 7 A t-test is used to test the null hypotheses H subscript 0 : mu equals 100. A random sample of 25 values gave a sample mean top enclose x = 110 and a sample standard deviation s = 20. What is the value of the t test statistic?

tstat = \frac{x-\mu}{\frac{s}{\sqrt{n}}}=\frac{110-100}{\frac{20}{\sqrt{25}}}= 2.5

QUESTION 8 A test of hypotheses is carried out at the alpha = 0.05 level. The P-value for the applied test is calculated to be 0.08. The decision is made to reject the null hypothesis. The correct decision is made in this case? False

We can reject the null hypothesis if the pvalue is less thatn level of signficance of 0.05 Hence the decision is incorrect. We cannot reject the null hypothesis.