1. A random sample of 11 adults is obtained, and each person's red blood cell count (in cells per microliter) is measured. The sample mean blood cell was 4.4 with a standard deviation of 0.39. a) Construct a 95% confidence interval estimate for the true mean red blood cell counts of adults. Round to 2 decimal places. b) A microbiologist suggests that the mean cell count is 4.7. Does your confidence that you found in part a refute or support their claim? Explain.

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A: Here use combination

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A: