Listed in the data table are amounts of​ strontium-90 (in​ millibecquerels, or​ mBq, per gram of​ calcium) in a simple random sample of baby teeth obtained from residents in two cities. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Use a 0.05 significance level to test the claim that the mean amount of​ strontium-90 from city​ #1 residents is greater than the mean amount from city​ #2 residents.   a. The test statistic is ​(Round to two decimal places as​ needed.)   b. The​ P-value is ​(Round to three decimal places as​ needed.)

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Listed in the data table are amounts of​ strontium-90 (in​ millibecquerels, or​ mBq, per gram of​ calcium) in a simple random sample of baby teeth obtained from residents in two cities. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Use a 0.05 significance level to test the claim that the mean amount of​ strontium-90 from city​ #1 residents is greater than the mean amount from city​ #2 residents.

 

a. The test statistic is

​(Round to two decimal places as​ needed.)
 
b. The​ P-value is

​(Round to three decimal places as​ needed.)

City #1
107
86
121
119
101
104
213
131
290
100
275
145
City #2
117
67
100
85
83
107
110
111
139
133
101
209
Transcribed Image Text:City #1 107 86 121 119 101 104 213 131 290 100 275 145 City #2 117 67 100 85 83 107 110 111 139 133 101 209
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