A data set includes 105 body temperatures of healthy adult h

A data set includes 105 body temperatures of healthy adult humans for which x = 98.7 grade F and s= 0.64 degrees F. Complete parts a through b.

A) what is the bet point estimate of the mean body temerature of all healthy humans?
the best point estimate is __ grade F.(type an interger or a decimal)

B)using the sample statistics construct a 99% confidence interval estimate of the mean body temperature of all healthy humans. do the confidence interval limits contain 98.6 grade F? what does the sample suggest about the use 98.6 grade F as the mean body temerature?

__ gradeF < u <__ grade F (round to one decimal place as needed)

Do the confidence interval limits contain 98.6 F
__ No
__ Yes
What does this suggest about the use 98.6F as the mean body temperature?
__A)this suggests tha the mean body temperature could be higher than 98.6 F.
__B)this suggests tha the mean body temperature could be lower than 98.6 F.
__C)this suggests tha the mean body temperature could ver possibly be 98.6 F.

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Solution

Massive typos and unclear wordings here. I will try my best to understand the question...

A.)

98.2 (The best point estimation is the sample mean, I\'m assuming thats what the x here is)

B.)

Confidence interval: 98.2 +/- t(0.73/sqrt(107)) where t is the critical value for 90% confidence. Use a t table and you get 1.29 (two sided value)

So the confidence interval is (98.1090, 98.2910)

This does not include 98.6. So the sample suggests 98.6 is not the true mean for the population with 90% confidence.

Oh wait you wanted the answer in another format.

98.1 gradeF < u < 98.3 gradeF

Also, the multiple choice answer is B