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In: Statistics and Probability

1- A machine fills cereal boxes. A random sample of 6 boxes had a mean of...

1-

A machine fills cereal boxes. A random sample of 6 boxes had a mean of 20.25 oz. The distribution is assumed to be NORMAL with KNOWN standard deviation of 0.21 oz.

Find a 99% Confidence Interval UPPER LIMIT?

Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38

2-

A machine fills cereal boxes. A random sample of 6 boxes had a mean of 20.25 oz. The distribution is assumed to be NORMAL with KNOWN standard deviation of 0.21 oz.

Find a 80% Confidence Interval UPPER LIMIT?

Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38

3-

A machine fills cereal boxes. A random sample of 6 boxes had a mean of 20.25 oz. The distribution is assumed to be NORMAL with KNOWN standard deviation of 0.21 oz.

Find the SAMPLE SIZE required to obtain a 0.1 Margin of Error for a 95% confidence interval.

Note: Enter X INTEGER with NO DECIMAL and round up. Thus, 7 is entered as 7, 3.5 is entered as 4, and 0.375 is entered as 0

Solutions

Expert Solution

PROBLEM 3 : Let us understand the 95% confidence interval first

orchestra answered 2 years ago
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