One-sample t-test: To test whether the average weight of a student population is different from 140lbs., a random sample of 22 students is selected and students weights are recorded. 135 119 106 135 180 108 128 160 143 175 170 205 195 185 182 150 175 190 180 195 220 235 State the null and alternative hypotheses.

Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of 20 people who used the programs provided the following data. Program A B C 510 450 600 400 510 620 490 400 580 520 430 490 490 480 590 630 360 640   550 560   Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use ? = 0.05. State the null and alternative hypotheses.   -H0: MedianA ≠ MedianB ≠ MedianCHa: MedianA = MedianB = MedianC -H0: MedianA = MedianB = MedianCHa: MedianA ≠ MedianB ≠ MedianC     -H0: All populations of test scores are identical.Ha: Not all populations of test scores are identical. -H0: MedianA = MedianB = MedianCHa: MedianA > MedianB < MedianC -H0: Not all populations of test scores are identical.Ha: All populations of test scores are identical.   Find the value of the test statistic. (Round your answer to two decimal places.) Answer=??   Find the p-value.…

1. Katerina Rogers is preparing for her Javelina throw event in the next Olympics. In 18 successive throws, her records (in meters) are: 65 70 68 63 59 71 66 68 62 70 76 69 65 73 67 65 70 70 Using a nonparametric test procedure, test at 5% level if on an average Katerina threw her Javelin more than 65 meters.

An exam consists of twenty multiple-choice questions. Each question has five different possible answers, only one of which is correct. A person randomly guesses on each question. What isthe variance of the number of questions that are correct?

A random experiment involves drawing a sample of 12 data values from a normally distributed population. The random variable is the range of the data set. 47 51 53 54 56 61 61 62 63 63 63 64 Give the random variable. (Appropriate rounding rules still apply.) r.v. =

A group of 500 people were asked to cast votes regarding a particular political issue. The following frequencies occurred.                       Favor           Undecided              Oppose                  Totals Female             180                  80                          40                         300 Male                 150                  20                         30                         200 Totals                330                 100                         70                         500 1. Determine if voters’ opinions are independent or dependent of gender.  Set up hypotheses; perform a test for independence; analyze all relevant aspects of your conclusion.

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Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ or p) for the indicated parameter.The mean college professors' salary is claimed to be  over $80,300.

You perform a two-sample hypothesis test to compare the proportions of two populations. You find that your p-value is greater than alpha. This means: Group of answer choices a.You have evidence that the population proportions are the same. b.You have evidence that the population proportions are different. c.You do not have evidence that the population proportions are different. d.You do not have evidence that the sample proportions are different.

A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 258 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related? Vaccination Status Diseased Not Diseased Total Vaccinated 55 62 117 Not Vaccinated 70 71 141 Total 125 133 258 Copy Data Step 1 of 8: State the null and alternative hypothesis.