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Mathematics, 14.01.2021 02:20 cicimarie2018

He method of tree ring dating gave the following years A. D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1,264 1,278 1,250 1,236 1,268 1,316 1,275 1,317 1,275
A button hyperlink to the SALT program that reads: Use SALT.
(a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.)
x = Incorrect: Your answer is incorrect. A. D.
s = Incorrect: Your answer is incorrect. yr

(b) Find a 90% confidence interval for the mean of all tree ring dates from this archaeological site. (Round your answers to the nearest whole number.)
lower limit Incorrect: Your answer is incorrect. A. D.
upper limit Incorrect: Your answer is incorrect. A. D.

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