Q2. Use the following contingency table and the chi-square test of independence to determine whether social class is independent of number of children in a family. Let a= .05. Also give interpretation. Social class Lower Middle upper 6 Number of 0 18 children 9. 34 38 23 58 2 or 3 97 More than 3 47 31 30

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n, where k is the percentile and n is the sample size. Given a sorted sample of 234 IQ scores, what is the value of the 40th percentile? 100 When finding the value of a percentile, the location of that value is L = Choose the correct answer below. O A. The 93rd IQ score in the sorted list O B. The 40th IQ score in the sorted list. O C. The 94th IQ score in the sorted list O D. The IQ score midway between the 40th and 41st scores in the sorted list.

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Number of ninth graders (Frequency) Mean Test Score High School Glenwood 82 262 Central 92 311 Lincoln 67 168 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 82, 92, and 67, whic incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place 80.3. Of course, that is Mean of all ninth grader's scores *

Suppose there are 5 students in a room. The mean age is 19.8 years, and the median age is 19. If the youngest person leaves and is not replaced by another person, what happens to the mean and the median? O The mean and median increase. The mean increases, and the median either increases or stays the same. The mean increases, but it is impossible to determine whether the median increases, decreases, or stays the same. The mean increases, and the median stays the same. The median increases, and the mean either increases or stays the same.

ExQm Score Oata 76 69 64 75 70 80 26 51 64 95 90 86 77 79 82 62 76 65 68 74 celaus, exam deta (aboue), compute he mean for the meesure olo she dota median 2 whyys 2 For Jhe cleess which best represents or the think the mean

What is the difference between the mean and the median of the set {10, 12, 10, 16}? 01 01 04 09 O 12