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A charity claims that a proportion of 0.75 of donations go to communities where the average family income is less than $20,000 a year. A

A charity claims that a proportion of 0.75 of donations go to communities where the average family income is less than $20,000 a year. A watchdog group checks a random sample of 60 communities that received funds from the charity to determine if the proportion is different than 0.75 at a significance level of 0.05.

p^=

z=

p=

Since the p-value is

evidence exists that the proportion of donations to communities with an average family income of less than $20,000 a year is different from 0.75.

than the significance level 0.05, the null hypothesis

.

Pick greater less

Pick fails to be rejected is rejected

Pick Sufficient Insufficient

Use Sheet 8 of the Excel file, which gives the average family incomes for the 60 communities, to calculate p^, the z-score, and the p-value.

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22102.34538
19230.70983
10524.63431
15574.55973
22955.34585
20156.86904
14146.10017
13934.86288
18814.41811
24729.40208
18099.44342
18094.57003
19855.24673
26227.10318
10172.85598
17326.21723
20742.33129
18245.58767
26793.34789
18746.46766
15024.89515
7850.793716
21971.77513
30918.97946
13486.58366
16443.1267
17816.94093
20501.37774
13403.94043
24902.91198
18534.76288
13200.07533
9534.121003
21173.16423
24454.80204
19733.54186
17896.16805
17298.67316
17586.3935
12622.33216
15519.62447
29892.31156
24534.66483
30868.31661
22189.32289
24831.06565
21282.50375
19620.42361
13109.75117
19029.88796
17173.20852
14230.10117
15564.19681
20138.13011
24522.20415
16347.75667
17479.89171
19352.98862
23319.27661
23795.24314

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