SOLUTION: Researchers want to estimate the mean weight of all chipmunks living in Albuquerque, NM. Using the population standard deviation of 1.4 ounces as in Question #5, find the sample

Question 304168: Researchers want to estimate the mean weight of all chipmunks living in Albuquerque, NM. Using the population standard deviation of 1.4 ounces as in Question #5, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
a. 11 chipmunks
b. 120 chipmunks
c. 121 chipmunks
d. 120.5 chipmunks
e. 44 chipmunks
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Researchers want to estimate the mean weight of all chipmunks living in Albuquerque, NM. Using the population standard deviation of 1.4 ounces as in Question #5, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
-----
n = [z*s/E]^2
n = [1.96*1.4/0.25]^2 = 120
=================================
Cheers,
Stan H.
=================================
a. 11 chipmunks
b. 120 chipmunks
c. 121 chipmunks
d. 120.5 chipmunks
e. 44 chipmunks

RELATED QUESTIONS
Researchers want to estimate the mean weight of all chipmunks living in Albuquerque, NM.... (answered by stanbon)

The weights of adult chipmunks vary according to a normal distribution with standard... (answered by stanbon)

We want to obtain a sample to estimate a population mean. Based on previous evidence,... (answered by Boreal)

We want to obtain a sample to estimate a population mean. Based on previous evidence,... (answered by ewatrrr)

How many women must be randomly selected to estimate the mean weight of women in one age... (answered by Sultan1)

Question 1: From past record, 75% of the retirees stated that they preferred living in... (answered by oscargut)

(Give your answers correct to TWO (2) decimal places) In a butter cookies packing... (answered by ewatrrr)

You want to estimate the mean time college students spend watching online videos each... (answered by Boreal)