A sales manager for a large department store believes that customer spending per visit with a sale is higher than customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is taken from without a sale and with a sale. The results are shown below. Without sale With safe Mean 74.894 78.138 Varkence 1951.47 1852.0102 Observations 200 300 Hypethestred Men Difference of 419 tStat 0.813 0.206 PTet one-tal tCrtkal one-tal 1648 P(Te two-tal tCrtical two-tal 0417 1.966 Confidence Level 95K Ex 1.234 Samples from without sale: n = Ex 9 Samples from with sale: n2 = Point estimate for spending without sale: = Ex 1.234 Point estimate for spending with sale. T2 %3D

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O https://learn.zybooks.com/zybook/MAT-240-J4373-OL-TRAD-UG.22EW4/chapter/8/section/1?content_resource. A Q
library > MAT 240: Applied Statistics home >
Hypothesis tests for the difference between two population means
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Start
A sales manager for a large department store believes that customer spending per visit with a sale is higher than
customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is
taken from without a sale and with a sale. The results are shown below.
Without sale With safe
Mean
74.894
78.138
Variance
1951.47 1852.0102
Observations
200
300
Hypathestkpd Mean Difference
df
419
tStat
O.813
P(T<t) one-tal
0.208
tOrtkal one-tail
1,648
P(T<=t) two-tal
0.417
t Critkal two-tall
1.966
Confidence Level
95%
p=
Ex: 1.234
Samples from without sale: n = Ex: 9
Samples from with sale: n2 =
Point estimate for spending without sale: = Ex 1.234
Point estimate for spending with sale: a2 =
%3!
Check
Next
ere to search
fo
80°F A a O O
F3
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* F11
F5
F6
F7
F9
F10
Prisc
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F12
%23
&
ak
4.
5
8.
9.
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Nu
Loc
Y
U
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F
K
L
%D
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V
M
Transcribed Image Text:O https://learn.zybooks.com/zybook/MAT-240-J4373-OL-TRAD-UG.22EW4/chapter/8/section/1?content_resource. A Q library > MAT 240: Applied Statistics home > Hypothesis tests for the difference between two population means E zyBooks catalog O Help/FAC Start A sales manager for a large department store believes that customer spending per visit with a sale is higher than customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is taken from without a sale and with a sale. The results are shown below. Without sale With safe Mean 74.894 78.138 Variance 1951.47 1852.0102 Observations 200 300 Hypathestkpd Mean Difference df 419 tStat O.813 P(T<t) one-tal 0.208 tOrtkal one-tail 1,648 P(T<=t) two-tal 0.417 t Critkal two-tall 1.966 Confidence Level 95% p= Ex: 1.234 Samples from without sale: n = Ex: 9 Samples from with sale: n2 = Point estimate for spending without sale: = Ex 1.234 Point estimate for spending with sale: a2 = %3! Check Next ere to search fo 80°F A a O O F3 - * F11 F5 F6 F7 F9 F10 Prisc Insert Delete F12 %23 & ak 4. 5 8. 9. Backspace Nu Loc Y U P F K L %D Enter V M
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