In: Statistics and Probability
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 0.05significance 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.
City_#1 |
City_#2 |
102 |
117 |
86 |
62 |
121 |
100 |
120 |
85 |
101 |
80 |
104 |
107 |
213 |
110 |
101 |
111 |
290 |
140 |
100 |
133 |
254 |
101 |
145 |
209 |
The test statistic is ???
(Round to two decimal places as needed.)
The P-value is ????
(Round to three decimal places as needed.)
State the conclusion for the test.
A.
Reject the null hypothesis. There is sufficient evidence to support the claim that the mean amount of strontium-90 from city #1 residents is greater.
B.
Rejectthe null hypothesis. There is notsufficient evidence to support the claim that the mean amount of strontium-90 from city #1 residents is greater.
C.
Fail to reject the null hypothesis. There is notsufficient evidence to support the claim that the mean amount of strontium-90 from city #1 residents is greater.
D.
Fail to rejectthe null hypothesis. There is sufficient evidence to support the claim that the mean amount of strontium-90 from city #1 residents is greater.