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# A medical investigation claims that the average number of contaminations per week at a Main Hospital is 100. A random sample of 10 weeks had a mean...

A medical investigation claims that the average number of contaminations per week at a Main Hospital is 100.4. A random sample of 10 weeks had a mean number of 99.98. The sample standard deviation is 2.9. Is there enough evidence to reject the investigator's claim at alpha =.05?