The life span in Honolulu is approximately normally distributed. The mean life span is 77 years. A foreign newspaper claims that the mean lifespan for Honolulu residents is less than 77 years. You randomly select a sample of 20 obituary notices in a Honolulu newspaper. The table below shows the data collected (in years).

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Chapter1: Starting With Matlab
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which choice is correct

The life span in Honolulu is approximately normally distributed. The mean life span is
77 years.
A foreign newspaper claims that the mean lifespan for Honolulu residents is less than
77 years.
You randomly select a sample of 20 obituary notices in a Honolulu newspaper. The
table below shows the data collected (in years).
72
68
81
93
56
19
78
94
83
84
77
69
85
97
75
71
86
47
66
27
Test the foreign newspaper's claim using a = 0.01.
There is enough evidence to reject the null hypothesis. The claim is true.
There is enough evidence to reject the null hypothesis. The claim is false.
There is not enough evidence to reject the null hypothesis. The claim is probably true.
There is not enough evidence to reject the null hypothesis. The claim is probably false.
Transcribed Image Text:The life span in Honolulu is approximately normally distributed. The mean life span is 77 years. A foreign newspaper claims that the mean lifespan for Honolulu residents is less than 77 years. You randomly select a sample of 20 obituary notices in a Honolulu newspaper. The table below shows the data collected (in years). 72 68 81 93 56 19 78 94 83 84 77 69 85 97 75 71 86 47 66 27 Test the foreign newspaper's claim using a = 0.01. There is enough evidence to reject the null hypothesis. The claim is true. There is enough evidence to reject the null hypothesis. The claim is false. There is not enough evidence to reject the null hypothesis. The claim is probably true. There is not enough evidence to reject the null hypothesis. The claim is probably false.
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