21238 15042 13201 10320 20047 14608 13058 10214 17756 14461 12801 9076 16367 142

ID: 2948350 • Letter: 2

Question

21238
15042
13201
10320
20047
14608
13058
10214
17756
14461
12801
9076
16367
14282
10502
7462
15072
13288
10478
7147

1) Please explain how to compute the frequency data between 9631 and 17011

First find the boundaries of the interval within ±1 standard deviation of the mean. Use the mean and standard deviation found in part a to calculate

?+1 •? and ?-1 •?

13,321?3,690=9 9,631

3,321+3,690equals=17,011

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Now count the frequency of data between 9,631 and 17,011. Note that it is helpful to sort the data.

The frequency is 14.

Here

mean = 13321

standard deviation = 3786

mean - standard deviation = 13321 - 3786 = 9535

mean + standard deviation = 13321 + 3786 = 17107

Now,

The count the frequency of data between 9,631 and 17,011 = 14

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