Need help with practice questions

13. A new species of sea crab has been discovered, and an experiment conducted to determine whether or not the animal can regulate its temperature. That the animal can maintain a body temperature different from the surroundings would be considered evidence of this regulating capability. Ten of these sea crabs were exposed to ambient temperatures of 24 degrees Celsius. Their body temperatures were measured with the results below. It's reasonable to assume that the 10 crabs are representative of all crabs and temperatures are normally distributed. 24.33 24.61 24.67 24.64 24.42 25.23 24.73 24.90 24.44 24.97 a) Calculate the point estimate of the population mean. b) Construct and interpret a 95% confidence interval for u. c) Does it appear from these data that the crabs are able to regulate their body temperature? Provide statistical justification. punt .ellad isee hes vispugs 14. A hospital is interested in estimating the true mean baby weight of all live births at their facility. They would like to be 95% confident in their estimate with a margin of error no bigger than 4 pounds. How many babies do they need to sample to achieve these results? Assume the population standard deviation o = 0.6 pound