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Author Question: A random sample of 15 telephone calls in an office showed the duration of each call and whether it ... (Read 76 times)

stananza

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A random sample of 15 telephone calls in an office showed the duration of each call and whether it was a local or a long distance call.

 

 

Duration

 

Call Number

(In Minutes)

Type of Call

1

2

local

2

12

long distance

3

10

local

4

3

local

5

5

long distance

6

6

local

7

3

local

8

5

local

9

8

local

10

4

local

11

5

local

12

4

local

13

5

local

14

4

local

15

9

long distance


 

a.What is the point estimate for the average duration of all calls?
b.What is the point estimate for the standard deviation of the population?
c.What is the point estimate for the proportion of all calls that were long distance?



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Marked as best answer by stananza on Mar 25, 2023

dsd1212

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stananza

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Reply 2 on: Mar 25, 2023
YES! Correct, THANKS for helping me on my review


kilada

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Reply 3 on: Yesterday
Wow, this really help

 

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