Project #84932 - Stat Quiz

 

Note: It is recommended that you save your response as you complete each question.

Question 1 (25 points)

 Question 1 Unsaved

Question 1 options:

A survey of American Society of Investors found 30% of individual investors have used a discount broker. 

In a random sample of nine individuals, what is the probability:

 

a.    Exactly two of the sample individuals have used a discount broker?  P(x = 2)

Enter answers to 4 decimal places with 0 to the left of the decimal point.

Spell check

 

b.    None of the 9 individuals have used a discount broker.  P(X = 0)

Enter answers to 4 decimal places with 0 to the left of the decimal point.https://learn.umuc.edu/d2l/img/lp/pixel.gif

Spell check

 

c.    Two or three individuals have used a discount broker.  P( 2 <= X <= 3)

Enter answers to 4 decimal places with 0 to the left of the decimal point.

Spell check

 

d.    What is the mean and standard deviation for this distribution?

Enter each answer to 2 decimal places.

Spell check

Spell check

Save

Question 2 (25 points)

 Question 2 Unsaved

Question 2 options:

A.C. Nielesen Company provides information to organizations advertising on television.Prior research indicates that adult Americans watch an average of 6.0 hours per day of television.  The standard deviation is 1.5 hours.  Assume the time distribution is normally distributed.

What is the probability that a randomly selected adult Americans watches 5 or more hours of television per day?

Enter answer rounded to 4 decimal places with a 0 to the left of the decimal point.

Spell check

 

What is the probability that a randomly selected adult Americans watches between 7 and 8 hours of  television per day?

Enter answer rounded to 4 decimal places with a 0 to the left of the decimal point.

Spell check

 

For how many hours per day must an adult American watch television in order to be in the top 5% ofadult American television watchers?

Enter answer rounded to 1 decimal place.

 

Spell check

 

In a sample of 25 randomly selected adult Americans what is the probability that the average time for watching television per day will be equal to or exceeds 6.5 hours?

Enter answer rounded to 4 decimal places with a 0 to the left of the decimal point.

Spell check

Save

Question 3 (25 points)

 Question 3 Unsaved

Question 3 options:

The owner of the Britten's Egg Farm wants to estimate the mean number of eggs produced per chicken.  A representative random sample of 20 chickens show they produce an average of 25 eggs per month with a standard deviation of 2 eggs per month.  The distribution is known to be symmetrical and is close enough to normal to be treated as a normal distribution.

Answer the following questions related to and calculating a 90% confidence interval for the mean number of eggs produced per chicken on the Britten's Egg Farm.

What is the point estimate of the mean number of eggs produced per chicken?

Enter answer with 0 decimal places (integer).

Spell check


What is the applicable distribution for calculating the 90% confidence interval?

a     Uniform distribution

b     Normal distribution

c     t distribution

d     Chi Square distribution

Answer this question by entering the appropriate letter.

Spell check

 

What is the degrees of freedom (dF) for this problem.  Enter Na if dF is not required by the applicable distribution.

Spell check

 

Calculate the margin of error for the 90% confidence interval for the mean amount of eggs laid per month on the Britten's Egg Farm.

Enter answer rounded to 3 decimal points.

Spell check

 

The 90% conference interval for the mean number eggs produced per month is:

Enter the lower and upper limits for the conference interval by entering the lower limit first.
Rounded each conference limit to 3 decimal points.

Spell check

Spell check

  

Prior to this study the owner of the Britten's Egg Farm Egg Farm believed the mean amount off eggs produced per month on his farm was 30.

Does the study support his belief with 90% confidence?

a     Yes. The mean amount of eggs produced per month on his farm is 30 per month because the number 30 is not contained in the confidence interval.

b     Yes. The mean amount of eggs produced per month on his farm is 30 per month because the number 30 is contained in the confidence interval.

c     No.  The mean amount of eggs produced per month on his farm is not 30 per month because the number 30 is not contained in the confidence interval.

d     No.  The owner can not comment on the mean amount of eggs produced per month on his farm because the confidence interval is based upon a sample.

Enter the correct answer by selecting and entering the appropriate letter.

Spell check

Save

Question 4 (25 points)

 Question 4 Unsaved

Question 4 options:

The waiting time for customers at MacBerger Restaurants follows a normal distribution with a population standard deviation of 1 minute.
At the Warren Road MacBerger, the quality assurance department sampled 49 customers and found that the mean waiting time was 2.75 minutes.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes.

The Null Hypothesis is:

a     The waiting time for customers at MacBerger Restaurants is equal to        _______.

b    The waiting time for customers at MacBerger Restaurants is greater than  _______.

c    The waiting time for customers at MacBerger Restaurants is less than       _______.

d    The waiting time for customers at MacBerger Restaurants is not equal to  _______.

Enter the correct answer by selecting the appropriate letter and entering the correct number. Enter number to the same precision as presented in the question.

Spell check

Spell check

 

The Alternate Hypothesis is:

a     The waiting time for customers at MacBerger Restaurants is equal to         ______.

b    The waiting time for customers at MacBerger Restaurants is greater than    ______.

c    The waiting time for customers at MacBerger Restaurants is less than         ______.
 
d    The waiting time for customers at MacBerger Restaurants is not equal to    ______.

Enter the correct answer by selecting the appropriate letter and entering the correct number. Enter number to the same precision as presented in the question.

Spell check

Spell check

 

The appropriate distribution is:

a     Uniform Distribution
b     Normal Distribution
c      t Distribution
d     Chi Square Distribution


The Hypothesis test is:

a     Left tail test
b     Right tail test
c     Two tail test


Enter the appropriate letters for answering the questions in the same order in which the questions are asked.

Spell check

Spell check

 

Select the letter for the appropriate decision rule.  Enter the appropriate letter and then the critical value.

Decision:

a     Ha hypothesis: If the test statistic is equal to or greater than the critical value which is     _____.

b     Ha hypothesis: If the test statistic is equal to or less than the critical value which is          _____.

c     Ha hypothesis: If the absolute value of the test statistic is equal to or greater than the critical value which is   _____. 

Spell check

Spell check

The numerical value of the test statistic is:

Spell check

 

Hypothesis Test Decision:

a     Null Hypothesis:  Do not reject the null hypothesis. The data does not support the Alternate Hypothesis. 

b     Alternate Hypothesis:  Reject the null hypothesis. The data supports the Alternate Hypothesis. 

c    The waiting time for customers at MacBerger Restaurants cannot be determined because the data set is a sample.

Enter the correct answer by selecting the appropriate letter.

Spell check

 

Save

Subject Mathematics
Due By (Pacific Time) 10/04/2015 07:00 pm
Report DMCA
TutorRating
pallavi

Chat Now!

out of 1971 reviews
More..
amosmm

Chat Now!

out of 766 reviews
More..
PhyzKyd

Chat Now!

out of 1164 reviews
More..
rajdeep77

Chat Now!

out of 721 reviews
More..
sctys

Chat Now!

out of 1600 reviews
More..
sharadgreen

Chat Now!

out of 770 reviews
More..
topnotcher

Chat Now!

out of 766 reviews
More..
XXXIAO

Chat Now!

out of 680 reviews
More..
All Rights Reserved. Copyright by AceMyHW.com - Copyright Policy