Determine the test statistic for this hypothesis test. to = (Round to two decimal places as needed.)

The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find the probability of getting someone who tests negative​, given that he or she did not have the disease.     The individual actually had the disease   Yes No Positive 127 18 Negative 34 121         The probability is approximately enter your response here. ​(Round to three decimal places as​ needed.)

The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find the probability of getting someone who tested positive, given that he or she did not have the disease. The individual actually had the disease No Positive Negative Yes 144 20 C The probability is approximately. (Round to three decimal places as needed.) 8 128

A professor asks her students to select which day they would prefer to have their exam: Mon, Wed, or Fri. Do students equally prefer all three options? Which test is most appropriate to conduct? One-way ANOVA Independent t-test Dependent t-test z-test Chi-sqaure

Which of the following are required to use the t test (remember there is both the variable you are testing and the grouping variable)?   a. An Interval variable   b. A Dichotomous variable   c. Neither a nor b   d. Both a and b

The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find the probability of getting someone who tested positive, given that he or she had the disease. The probability is approximately The individual actually had the disease Yes D No 126 11 Positive Negative (Round to three decimal places as needed.) 34 129

ANSWERS ALL PARTS A,B,C A) Roll a dice, X=the number obtained. Calculate E(X), Var(X). Use two expressions to calculate variance. B) Two fair dice are tossed, and the face on each die is observed. Y=sum of the numbers obtained in 2 rolls of a dice. Calculate E(Y), Var(Y). C) Roll the dice 3 times, Z=sum of the numbers obtained in 3 rolls of a dice. Calculate E(Z), Var(Z) from the result of part a and b.

Q 10. D c (careful!). ifferentiate lIn

Give the degrees of freedom for the chi-square test based on the two-way table. Strongly Agree Strongly Disagree Agree Neutral Disagree Control 40 50 15 10 Treatment 60 45 10 Degrees of freedom =

A baseball team claims that the mean length of its games is more than 1.4 hours. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is​ left-tailed, right-tailed, or​ two-tailed. Explain your reasoning.       State the null hypothesis in words and in symbols. Choose the correct answer below.     A. The null hypothesis expressed in words​ is, "the mean length of a baseball​ team's games is not 1.4 ​hours." The null hypothesis is expressed symbolically​ as, ​"H0​: μ≠1.4​."   B. The null hypothesis expressed in words​ is, "the mean length of a baseball​ team's games is at least 1.4 ​hours." The null hypothesis is expressed symbolically​ as, ​"H0​: μ≥1.4​."   C. The null hypothesis expressed in words​ is, "the mean length of a baseball​ team's games is at most 1.4 ​hours." The null hypothesis is expressed symbolically​ as, ​"H0​: μ≤1.4​."   D. The null hypothesis expressed in words​ is, "the mean length of a…