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 0.01 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.Complete parts (a) and (b) below. City #1 City #2 101 117 86 62 121 100 111 85 101 90 104 107 213 110 100 111 290 149 100 133 272 101 145 209 a. What are the null and alternative hypotheses? The test statistic, t, is The P-value is State the conclusion for the test. b. Construct a confidence interval suitable for testing the claim that the mean amount of strontium-90 from city #1 residents is greater than the mean amount from city #2 residents.
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
City #1 City #2
101 117
86 62
121 100
111 85
101 90
104 107
213 110
100 111
290 149
100 133
272 101
145 209
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