Listed in the data table are amounts of? strontium-90 (in? millibecquerels, or?

Question

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 0.10 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 statistics, t ____ (round 2 decimal places as needed)

b) the p-value is ____ (round 3 decimal places as needed)

7011319 0110300 5 88 #8 1314310085 0 2100109084 1111212121

Explanation / Answer

Sol:

go to

daa>data analysis>t test assuming unequal variance

test statistic:t=1.59

p=0.066

t-Test: Two-Sample Assuming Unequal Variances city1 city2 Mean 147.5 109.75 Variance 5459.182 1344.023 Observations 12 12 Hypothesized Mean Difference 0 df 16 t Stat 1.585444 P(T<=t) one-tail 0.066215 t Critical one-tail 1.336757 P(T<=t) two-tail 0.132429 t Critical two-tail 1.745884

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