The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population o
f x values has an approximately normal distribution.1229 1257 1313 1201 1268 1316 1275 1317 1275(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 the nearest whole number.)x = A.D.s = 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 A.D.upper limit A.D.
1 answer:
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Answer:
Step-by-step explanation:
Given the expression
Remove parentheses: (a)=a
Group like terms
Add similar elements
∵
Add similar elements
∵
Thus, the equivalent expression in simplified form:
Answer:
Step-by-step explanation:
we would like to integrate the following Integral:
well, to get the constant we can consider the following Integration rule:
therefore,
recall exponent integration rule:
so let,
Thus integrate:
simplify addition:
reduce fraction:
finally we of course have to add the constant of integration:
hence,
our answer is D)