At the 99% level, Test the Hypothesis that samples A, B anc C are drawn from the same population A 42 64 57 37 52 B 46 72 69 39 67 Select one: C 83 93 79 44 91 a. TS= 6.44 CV = 9.21 b. TS 6.04 CV = 9.21 C. TS = 4.77 CV 9.21 d. TS= 5.98 CV = 9.21

A student surveyed a random sample of 301 students in her large college and collected the data in the table below, on the variables class year and favorite team sport. Perform a chi-square test to determine if the variables class year and favorite team sport are independent.     Basketball Soccer Baseball/Softball Other Total Freshman 12 41 11 1 65 Sophomore 12 43 17 7 79 Junior 10 44 10 11 75 Senior 10 49 18 5 82 Total 44 177 56 24 301 What is the test statistic for the chi-squared test? (round to 3 dp)  . The p-value for this test is  . (If p-value <0.001, enter 0, otherwise report to 4 dp) Select the appropriate conclusion for this test at a significance level of α=0.05.A. Reject H0H0. We have significant evidence that class year and team sports are not independent.B. Fail to reject H0H0. We do not have significant evidence that class year and team sports are not independent.

Complete the following table that lists all possible samples of n = 2 scores from the population. Use the first three rows (Samples a-c) as examples. Sample a b с d e f 9 h i Score 1 Score 2 1 Mean of 1 1 SS n-1 4 4 4 7 7 7 Mean of M column= column= 1 SS Mean of column = n 4 7 1 4 7 1 4 7 M = This EX n 1.00 2.50 This 4.00 2.50 4.00 5.50 4.00 5.50 7.00 This SS 0.00 Calculate the mean for all values in the M column, SS column and in column. Which values match the parameters of the population? Identify those statistics that were biased. Identify those statistics that were unbiased. n-1 4.50 18.00 SS n-1 0.00 4.50 18.00 SS 0.00 2.25 9.00 the mean u of the population. The sample mean is ▼ the variance o² of the population. Sis the variance 02 of the population. SS is n-1 estimate of u. estimate of 02. estimate of g².

7h.  A travel association reported the domestic airfare (in dollars) for business travel for the current year and the previous year. Below is a sample of 12 flights with their domestic airfares shown for both years. CurrentYear PreviousYear 345 315 526 451 420 450 216 206 285 263 405 432 635 585 710 650 605 545 517 547 570 496 610 580   Calculate the test statistic. (Use current year airfare − previous year airfare. Round your answer to three decimal places.)   Calculate the p-value. (Round your answer to four decimal places.) p-value =

The instructor takes a random sample of size from the population data and obtains the following sample data: x 405 385 495 385 555 470   5 If we take random samples of size n = 6 from this population, the number of possible samples is: a 11,481,019,312               b 11,367,345,853               c 11,254,797,874               d 11,143,364,232

What percentage of hospitals provide at least some charity care? Based on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing at least some charity care):

Let x be the average number of employees in a group health insurance plan, and let y be theaverage administrative cost as a percentage of claims. The following data is based on a randomsample:x 5 7 15 25 35y 40 35 30 20 25a. Plot a scatter diagram of the above data.b. Estimate the sample correlation coefficient r as positive, zero, or negative.c. Interpret your results from parts a. and b.

Three randomly selected children are surveyed. The ages of the children are 1, 4, and 10. Assume that samples of size n = 2 are randomly selected with replacement from the population of 1, 4, and 10. Listed below are the nine different samples. Complete parts (a) through (d). 1,1 1,4 1,10 4,1 4,4 4,10 10,1 10,4 10,10 a. Find the value of the population median. 4 (Type an integer or a decimal. Do not round.) b. Find the median of each of the nine samples, then summarize the sampling distribution of the medians in the format of a table representing the probability distribution of the distinct median values. Sample Median 1 Probability ▼ ▼ ▼ ▼ L ■ (Type integers or simplified fractions.)

The number of winter vacation days during one year taken by 159 randomly selected employees were recorded. The data is summarized in the table below. Number   of Winter Vacation Days      Frequency    Cumulative Frequency    0 – 9 43   10 – 19 41   20 – 29 21   30 – 39 37   40 – 49 17