calculate the sample standard deviation and sample variance for the following fr

Question

calculate the sample standard deviation and sample variance for the following frequency distribution of heart rates for a sample of American adult O Save & End Certify Lesson: 3.2b Appying the Standard Devat.. DUSTYN LITTLE Question 3 of 9, Step 1 of 1 1/10 Correct Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.62 and a standard deviation of 0.4 Using the empirical rule, what percentage of the students have grade point averages that are greater than 3.827 Please do not round your answer Answer How to enter your answer Tables .Keypat Submit Answer 0 2018 Hawkes Learning Cortana. Ask me anything

Explanation / Answer

Accoding to emperical rule, 99.7% data lies within 3 standard deviations of mean

3.82 is exactly 3 satndard deviations above 2.62

(2.62 + 3x0.4 = 3.82)

2.62 - 3x0.4 = 1.42

99.7% is between 1.42 and 3.82

0.3% is below 1.42 or above 3.82

Percentage of students having grade point average greater than 3.82 = 0.3/2

= 0.15%

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