1.According to survey data collected from 500 students in a recent Stat class, the histogram for...

1.According to survey data collected from 500 students in a recent Stat class, the histogram for the number of hours of sleep they typically got per night is close to the normal curve with an average of 6.3 hours and a SD of 1.4 hours.

a) Find percentage of students who sleep between 7 and 8 hours

b) A student who sleeps only 5 hours per night is at the _______th percentile of the score distribution

2.Consider the following set of ten numbers: 5, 5, 5, 7, 7, 7, 7, 3, 3, 1a) Find the average and the media of these numbers

c) Find the standard deviation

d) If you were to cut every number in the list in half (i) the new average would be
(ii) the new median would be
(iii) the new standard deviation would be

Classes	Count (frequency)	Percentage of data

e) Now suppose you add the number 10 to the original list (so the new list has 11 numbers)
(i) the average would be

(ii) the median would be

Solutions

Expert Solution

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orchestra answered 1 year ago

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