The number of college credits completed by a sample of 40 students is shown below. 9 9 12 12 18 18 19 20 27 30 33 35 37 39 42 43 45 47 50 52 53 56 57 57 60 64 65 66 70 72 73 76 80 84 90 92 103 106 109 120 Looking at the histogram for the data, what is the shape? A) bell-shaped and symmetric B) uniform C) left-skewed D) symmetric, but not bell-shaped E) right-skewed

The number of college credits completed by a sample of 40 students is shown below. 9 9 12 12 18 18 19 20 27 30 33 35 37 39 42 43 45 47 50 52 53 56 57 57 60 64 65 66 70 72 73 76 80 84 90 92 103 106 109 120 Looking at the histogram for the data, what is the shape? A) bell-shaped and symmetric B) uniform C) left-skewed D) symmetric, but not bell-shaped E) right-skewed

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The data below show a sample of grades of students on their final exam in a statistics class. Grades 81 84 83 69 80 70 74 67 71 64 63 68 79 a) Find the average final exam grades for this class. [Round your answer to two decimal places.]The mean of midterm exam for the class was 83.31. Did the students tend to perform better on their final exam or midterm exam? Select an answer Final Exam Midterm Exam b) Find the sample standard deviation of the final exam grades. [Round your answer to two decimal places.]The standard deviation of the midterm grades was 5.31. Did the student's final grades tend to have more or less variation than their midterm grades? Select an answer more variation less variation
Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters, for a sample of 8 adults. The following table presents the results. Systolic Diastolic 125 85 108 85 103 78 114 78 119 67 118 88 131 75 116 71 Send data to Excel The least-squares regression line y = b,+b,x= 89.6478 – 0.0966x and E (x-x) = 551.5000 are known for this data. Use the critical value method to test H,: B, = 0 versus H, : B, <0. Can you conclude that systolic blood pressure is useful in predicting diastolic blood pressure? Use the a = 0.05 level of significance. Part: 0/ 4 Part 1 of 4 Find the critical value(s). Round the answer to three decimal places. If there is more than one critical value, separate them with commas. Critical value(s):
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