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Touro College

Statistics, GSMN 261

Summer 2022

Quiz #1

Date 6/28/22

Instructor:

Prof. Gregory Fishbein

Student Name:
——————————

1. Find the mean for the given sample data.

1, 5, 8, 12, 15, 19

2. Find the standard deviation for the above sample data. Round the answer to 1 decimal places

3. Find the median for the following samples

a) 5, 19, 27, 9, 30, 23, 15

b) 19, 27, 10, 28, 17, 40, 32, 25

_

4. Find the mean of the data summarized in the given frequency distributions, X. Round the answer to 2 decimal places.

Class limits

Class middle point Xi

Frequency

fi

Xi ( fi

6 ? 8

5

9 -11

2

12 ? 14

4

15 ? 17

1

(fi =

(Xi ( fi =

_ (Xi ( fi

X = ————— =

(fi

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