The "Freshman 15" refers to the belief that college students gain 15 lb (or 6.8 kg) during their freshman year. Listed in the accompanying table are weights (kg) of randomly selected male college freshmen. The weights were measured in September and later in April. Use the listed paired sample data, and assume that the samples are simple random samples and that the differences have a distribution that is approximately normal. Complete parts (a) through (c). September 51 71 58 81 73 64 64 68 54 April 54 77 56 82 75 68 60 68 56 a. Use a 0.01 significance level to test the claim that for the population of freshman male college students, the weights in September are less than the weights in the following April. In this example, " is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the April weight minus the September weight. What are the null and alternative hypotheses for the hypothesis test? Но: на = 0 кg H₁: Hd > 0 kg (Type integers or decimals. Do not round.) Identify the test statistic. t= -2.72 (Round to two decimal places as needed.)

The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…

c. The test-statistic for this data = (Please show your answer to three decimal places.) d. The p-value for this sample (Please show your answer to four decimal places.)

Find the percentile of the sample data 20 and 37.

Suppose that you are using independent samples to compare two population proportions. Fill in the blanks. a. The mean of all possible differences between the two sample proportions equals the_______.b. For large samples, the possible differences between the two samplel proportions have approximately a_________distribution.

Find the​ (a) mean,​ (b) median,​ (c) mode, and​ (d) midrange for the data and then​ (e) answer the given question.   Listed below are the weights in pounds of 11 players randomly selected from the roster of a championship sports team. Are the results likely to be representative of all players in that​ sport's league?   234     257     226     278     237     265     290     247     257     307     265          a. Find the mean.   The mean is enter your response here ​pound(s). ​(Type an integer or a decimal rounded to one decimal place as​ needed.)

The "Freshman 15" refers to the belief that college students gain 15 lb (or 6.8 kg) during their freshman year. Listed in the accompanying table are weights (kg) of randomly selected male college freshmen. The weights were measured in September and later in April. Use the listed paired sample data, and assume that the samples are simple random samples and that the differences have a distribution that is approximately normal. Complete parts (a) through (c). September 68 71 57 81 68 56 65 64 71 April 64 69 58 82 69 58 68 68 77 a. Use a 0.05 significance level to test the claim that for the population of freshman male college students, the weights in September are less than the weights in the following April. In this example, Hd is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the April weight minus the September weight. What are the null and alternative hypotheses for the hypothesis test? Ho Hd = 0 kg 0 kg H₁…

Find the variance for the following data  72,62,52,45 Round to three decimal places

Game Attendance An athletic director suggests the median number for the paid attendance at 18 local football games is 3000. The data for a sample are shown. At a 0.05, is there enough evidence to reject the claim? If you were printing the programs for the games, would you use this figure as a guide? 4231 5605 2556 5228 5586 3675 3867 3610 4679 5676 5779 4745 2907 4925 4785 4551 3112 3688 Send dats to Excel Part: 0/6 Part 1 of 6 (a) State the hypotheses and identify the claim with the correct hypotheses Ho (Choose one) (Choose one) This hypothesis test is a (Choose one) test. 00000-0 D-D

Calculate the standard score (z-score) of the given sample mean. Round your answer to two decimal places. u = 23 and o = 7; n = 72; ī = 22