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Author Question: A random sample of nine telephone calls in an office provided the following information.Call ... (Read 115 times)

lrhoads

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on: Mar 25, 2023

A random sample of nine telephone calls in an office provided the following information.

 


Call Number

Duration
(In Minutes)


Type of Call

1

3

local

2

8

long distance

3

4

local

4

3

local

5

5

long distance

6

6

local

7

3

local

8

5

local

9

8

local


 

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

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by lrhoads on Mar 25, 2023

SphnxKickin

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Reply #1 on: Mar 25, 2023
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lrhoads

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Reply 2 on: Mar 25, 2023
Excellent

ricroger

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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