MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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You're a sociologist studying whether grocery prices are different in the inner cities than they are in the suburbs. To investigate this, you pick a random set of items (a basket of goods), and then send shoppers to buy these items at an inner city (IC) grocery, and also at a suburban (SU) grocery. You pick 30 different baskets of goods, so your secret shoppers buy 30 baskets, once at the inner city store, and once at a suburban store.
The data is given in the dataset named "ICvSU_3095.xls", which you can find in data folder under Course Documents.
Prices could be higher in the inner city because of discrimination, or they could be higher in the suburbs because of the greater disposable income. Use Excel to test the research hypothesis that inner city prices are different than the suburb's prices. The null hypothesis is that inner city prices are equal to suburban prices. You test at the alpha = 0.05 significance level.
What do you conclude? Are prices the same? Who has higher prices?
Group of answer choices
You reject the null hypothesis. Grocery prices are the same in the inner city and the suburbs.
You do not reject the null hypothesis. Grocery prices are the same in the inner city and the suburbs.
You reject the null hypothesis; prices are different. Grocery prices are higher in the inner city.
You reject the null hypothesis; prices are different. Grocery prices are higher in the suburbs.
ICvSU_3095.xls
|
SU |
IC |
|
102.32 |
98.98 |
|
101.04 |
93.67 |
|
94.73 |
98.62 |
|
100.11 |
102.25 |
|
98.08 |
100.43 |
|
94.52 |
97.32 |
|
97.64 |
100.61 |
|
94.07 |
101.26 |
|
100.88 |
102.33 |
|
96.11 |
99.16 |
|
95.41 |
101.43 |
|
100.26 |
96.81 |
|
100.00 |
100.00 |
|
96.47 |
96.53 |
|
95.62 |
98.53 |
|
102.45 |
101.01 |
|
102.39 |
102.66 |
|
95.87 |
95.86 |
|
102.67 |
97.84 |
|
98.24 |
103.28 |
|
97.97 |
103.13 |
|
95.00 |
99.87 |
|
97.08 |
99.46 |
|
103.00 |
100.89 |
|
96.89 |
100.79 |
|
100.04 |
96.53 |
|
101.51 |
103.80 |
|
103.23 |
102.18 |
|
95.48 |
95.20 |
|
97.04 |
102.94 |
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