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An admissions officer at a Michigan State University is examining the relationship between college and high school gpas. recent set of students. Below are boxplots for a MSU GPA high school GPA Which of the following is incorrect O the mean high school GPA is higher than the mean college GPA O GPAs for college appear to be skewed to right O GPAs for high school appear to be sk 0 the variance of college GPAs is higher than high school GPAs

Question 17 5 pts Suppose we measure the distance two golf balls fly when hit by a mechanical golf club. We observe 100 distances for each ball. Golf ball A flies a mean distance of 265 yards, while golf ball B flies a mean distance of 272 yards. Suppose the variance of the distances measured for golf ball A is 65 and the variance of the distances measured for golf ball B is 54 . If the 5% critical value is 1.98, then the null hypothesis that the mean distance both balls travel is the same will be rejected O True O False

A random sample from 19 shirt manufacturers in Thailand was sampled for number of hours each week they operated. The average number of hours was 96.4 with a standard deviation of 13.2 hours. At the 5% significance level use table below the null hypothesis that the mean ours operated exceeds 95 will t distribution critical values Upper-tail probability p 1 1.000 1.376 1.963 3.078 6.314 12.71 15.89 3182 63,66 127.3 2 0.81e 1.061 1386 1886 2.920 4.303 4.849 6965 9.925 14.09 3 0.765 0978 1250 1638 2353 3.182 3.482 4.3413.841 7.453 4 0.741 0.941 1.190 1.533 2.132 2.776 2.999 3.747 4604 5.598 50.727 0.920 1156 1.476 2015 2.571 2.757 3.365 4.032 4.773 6 0.718 0.906 1134 1.440 1943 2.447 2.612 3.143 3.707 4.317 7 0.711 0.896 1.119 1.415 1.895 2.365 2.517 2998 3.4994.029 8 0.706 0.889 1.108 1.397 1.860 2.306 2.449 2.8963.3553.833 9 0.703 0.883 1.100 1383 1.833 2.262 2.398 2821 3.250 3.690 10 0.700 0.879 1.093 1.372 1812 2.228 2.359 2.7643.1693.58 110.697 0.876 1.088 1.363 1.796 2.201 2.328 2.7183.1063.497 12 0.695 0.873 1.0831356 1.782 2.179 2.303 2.681 3.055 3428 13 0.694 0.870 1079 1.350 1.771 2.160 2.282 2.650 3012 3372 14 0.692 0.868 1076 1.345 1.761 2.145 2.264 2.6242.9773.326 15 0.691066 1.074 1341 1.753 2.131 2249 2602 947 286 16 0.690 0865 1071 1.337 1.746 2.120 2.235 2.583 2.9213252 17 0.689 0.863 1069 1.333 1.740 2.110 2224 2567 2.898 3222 18 0.688 0.862 1067 1.330 1.734 2.101 2214 2.552 2.878 31927 19 0.688 0.861 1.066 1.328 1.729 2.093 2.205 2.539 2861 3174 2010687 0i60 1.064 1.325 1.725 2.086 2.97 2528 2 845 3153 2.583 2921 3252 O is not a valid null hypothesis O be rejected O not enough information giver O will not be rejected

D | Question 19 Suppose you gather the following test scores from you fellow students: 92,71,67,81.73,90,76,76,85,77,62,99. The upper quartile is 85 O The interquartile range is 15.5 O The median quartile is 76 O The lower quartile is 71 D Question 20 Which of the following are assumptions of the regression model O equal variance and zero mean O linearity and zero mean O linearity and equal variance O independence and correlation

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Homework Answers

Answer #1

1. The correct answer is: a).

Reason: clearly, the box plot indicates that the mean high school GPA is greater than the mean college GPA. ( Compare the middle line between the two box plots; which is above for the high school).

P.S. : As HOMEWORKLIB's policy nothing is mentioned then only the first question is to answered.

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