Maurice Tutor

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Expertise:
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Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
Last Sign in: 409 Weeks Ago, 1 Day Ago
Questions Answered: 66690
Tutorials Posted: 66688

Education

  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

Experience

  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 11 Jun 2017 My Price 11.00

city's telephone book

Exercise 1
 

A city's telephone book lists 280,000 people. If the telephone book is the frame for a study, how large would the sample size be if systematic sampling were done on every 100th person?

Sample size =

Exercise 2
 

A random sample of size 81 is drawn from a population with a standard deviation of 14. If only 18% of the time a sample mean greater than 300 is obtained, what is the mean of the population?

Round the answer to 2 decimal places.

 

 

Exercise 3

 

In a particular area of Tasmania, an estimated 75% of the homes use heating oil as the principal heating fuel during the winter. A random telephone survey of 150 homes is taken in an attempt to determine whether this figure is correct. Suppose 120 of the 150 homes surveyed use heating oil as the principal heating fuel. What is the probability of getting a sample proportion this large or larger if the population estimate is true?

Round all z values to 2 decimal places. Round all intermediate calculations and answer to 4 decimal places.

P(x) =

The tolerance is +/- 0.0001

 

 

 

 

 

 

 

QUESTION 4

For a population, N = 23000 and p = 0.18 . Find the z value for for n = 70 .

 

5.17

 

 

1.74

 

 

-2.18

 

 

7.04

 

 

-1.70
   

Question 5

Suppose the average checkout tab at a large supermarket is $65.13, with a standard deviation of $21.45. Twenty-three percent of the time when a random sample of 45 customer tabs is examined, the sample average should exceed what value?

Round the answer to 3 decimal places.

 

The tolerance is +/- 0.05.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 6
 

Forty-six percent of a population possesses a particular characteristic. Random samples are taken from this population. Determine the probability of each of the following occurrences.

Round all z values to 2 decimal places. Round all intermediate calculations and answers to 4 decimal places.

a. The sample size is 60 and the sample proportion is between .41 and .53.

P(x) =

b. The sample size is 458 and the sample proportion is less than .40.

P(x) =

c. The sample size is 1350 and the sample proportion is greater than .49.

P(x) =

The tolerance is +/- 0.0001

 

Question 7

For a population, N = 6000 , µ = 111 , and s = 14 . Find the z value for for n = 36 .

 

-0.283

 

 

9.565

 

 

5.778

 

 

7.543

 

 

Answers

Maurice Tutor
(5)
Status NEW Posted 11 Jun 2017 11:06 PM My Price 11.00

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