# Confidence Interval With Two Responses

post_forum_replies_week_6.docx

ice_cream_prices.xlsx

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gas_prices_east_texas.xlsx

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Responding to Student 1
Here are the totals for 36 customers that go into the ice cream parlor and buy ice cream:
6.28
3.40
1.90
15.65
12.05
5.67
2.13
4.25
1.35
4.56
3.29
11.50
7.89
3.00
6.56
4.99
2.45
9.50
15.23
3.75
8.02
2.15
6.39
9.02
4.32
6.73
1.99
3.54
9.20
5.56
10.56
3.90
4.50
5.79
0.89
6.85
When assuming that the alpha value is .05, determine the confidence interval.
What is the average price of their ice cream?
What is the standard deviation of all 36 totals?
Cree
Responding to Student 2
I have 36 different gas prices that varies during tornado season here in East Texas. The prices
are as follows:
\$2.96
\$3.01
\$3.19
\$2.89 \$3.05
\$3.39
\$2.76 \$3.03
\$3.32
\$2.79 \$2.85
\$3.31
\$2.82 \$2.83
\$3.40
\$2.84 \$2.81
\$3.20
\$2.86 \$3.09
\$3.26
\$2.91 \$3.50
\$3.60
\$2.90 \$3.42
\$3.59
\$2.93 \$3.49
\$3.57
\$2.97 \$3.21
\$3.52
\$2.99 \$3.24
\$3.54
Along with figuring out the average of all 36 gas prices, I would like to also know the Standard
Deviation of the gas prices.
Assuming the alpha value is .05, I would like to determine the confidence level with both the left
tail and right tail.
It took me some time to build this question so if I did something wrong, please let me know. I
appreciate you attempting to answer this question and if you need any clarification, please let me
know.
-Rocco
Price of Ice Cream
\$6.28
\$12.05
\$1.35
\$7.89
\$2.45
\$8.02
\$4.32
\$3.54
\$10.56
\$5.79
\$3.40
\$5.67
\$4.56
\$3.00
\$9.50
\$2.15
\$6.73
\$9.20
\$3.90
\$0.89
\$1.90
\$2.13
\$3.29
\$6.56
\$15.23
\$6.39
\$1.99
\$5.56
\$4.50
\$6.85
\$15.65
\$4.25
\$11.50
\$4.99
\$3.75
\$9.02
Mean
Standard Deviation
Confidence intervel
\$
\$
\$
\$
\$
\$
\$
\$
\$
\$
\$
\$
2,96
2,89
2,76
2,79
2,82
2,84
2,86
2,91
2,90
2,93
2,97
2,99
Gas Prices in the East Teaxas Area (during Tornado Season)
\$3,01
\$3,19
\$3,05
\$3,39
FIND:
\$3,03
\$3,32
Mean:
\$2,85
\$3,31
Standard Deviation:
\$2,83
\$3,40
Confidence Level:
\$2,81
\$3,20
Lower Bound:
\$3,09
\$3,26
Upper Bound:
\$3,50
\$3,60
**Assuming alpha value of .05
\$3,42
\$3,59
\$3,49
\$3,57
\$3,21
\$3,52
\$3,24
\$3,54

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