Problem 1. RADIATION IN BABY TEETH

Listed below are amount of radioactive isotope strontium-90 (in millibequerels, or mBq per gram of Calcium) in a simple random sample of baby teeth obtained from Pennsylvania residents and New York residents after 1979.

Pennsylvania	155	142	149	130	151	163	151	142	156	133
New York	133	140	142	131	134	129	128	140	140	140

Assume that amounts of radioactive isotope strontium-90 are normally distributed. Use a 0.01 significance level to test the claim that the amounts of strontium-90 from Pennsylvania residents are different than the amounts from New York residents.

Use the following steps:

Step 1.Write the Claim, Null Hypothesis and Alternative Hypothesis in symbols.

Step 2. Identify

Step 3.Check and identify the requirements for this test.

Step 4.State the test statistic and P-value (use Excel but do not round the results)

Step 5. State your decision to either reject or fail to reject the null hypothesis and why.

Step 6.Consider the claim and your decision and state the conclusion in the context of the problem.