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Unit 3 Dropbox Assignment Answers

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Unit 3 Dropbox Assignment Answers by Eric Houston II
In the summary tables below, insert only the answers. You will show work after the summary section.
Question 1 answer
Sample size should be: n = 150
Question 2 answer
Make sure you use full sentences for the items below. Do not simply say something like “x1<x2” “or “reject null” without a description.
Null hypothesis: For the Null hypothesis the mean price for a gallon of self-serve regular unleaded gasoline is less than or equal to (<) $3.16.

Alternative hypothesis: For the Alternative hypothesis the mean price for a gallon of self-serve regular unleaded gasoline is greater than (>) $3.16.

Conclusion & justification: For the conclusion and justification the p-value of 0.0028 is less than …show more content…
Observed t = 2.245 < 2.567, do not reject the Null hypothesis.

Therefore, at 0.01 level data provides insufficient evidence to support any claim that on the average men spend significantly more than woman on Valentine’s Day.

Work
Show all your work for the questions below.
Question 1
Show your work here.
99% confidence level, use z = 2.576

Min Value = 600
Max Value = 2500
Range, R = Max Value – Min Value = 2500 – 600 = 1900
Margin of error (E) = 100

Standard deviation = Range / 4 = 1900 / 4 = 475

Sample size is then:

Once this is finished it then needs to be rounded up to the closed number so here we would round up to 150 from 149.72. Required sample size = 150.

Question 2
Show your work here.
The Sample Mean is:
The Sample Standard Deviation is:

Null hypothesis: For the Null hypothesis the mean price for a gallon of self-serve regular unleaded gasoline is less than or equal to (<) $3.16.
Alternative hypothesis: For the Alternative hypothesis the mean price for a gallon of self-serve regular unleaded gasoline is greater than (>) $3.16.

Null hypothesis:

Alternative

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