Need to learn how to do problems like this in SPSS please :)
Note: This problem requires you to use SPSS to determine the correct answer. .
The weights (in milligrams) of M&M’s candies are normally distributed. The weights were recorded for a random sample of 8 blue M&M’s, and the data are given below:
{927, 788, 855, 963, 890, 941, 970, 897}
No other information is available. Based on these data, find a 99% confidence interval for μ, in milligrams (mg). Round your answer to the nearest milligram.
(829,979)
(849,959)
(853,955)
(862,946)
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Answers & Comments
99% confidence interval for population mean (Mu) is
sample mean +/- confidence coefficient * standard deviation/sqrt n
Confidence coefficient is the critical value of t for 7 degrees of freedom (n-1 = 8-1 = 7) for 99% confidence = 3.500
Now you can calculate sample mean and standard deviation and substitute the values in the above formula and obtain the correct answer yourself.