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In: Math

A company announced a "1000 Chips Trial" claiming that every 18 ounce bag of its cookies...

A company announced a "1000 Chips Trial" claiming that every 18 ounce bag of its cookies contained at least 1000 chocolate chips. Students purchased random bags from cookies from different stores and counted the number of chips in each bag. Some of the data is shown below.

1042 1132 1134 1255 1278 1233 1265 1339 1311 1450

Q1--Create a 95% confidence interval for the average number of chips. (SHOW EVERY STEP, I am completely lost on how to do this).

Q2--What percentage of bags will have fewwer then 1000 chips. (SHOW EVERY STEP).

Solutions

Expert Solution

First of all we calculate the mean and standard deviation of the given sample :

Q1

Q2

Probability that bag will have fewer than 1000 chips = P(X<1000)

We use Excel function "NORMSDIST()" as :

Hence, Percentage of bags will have fewer than 1000 chips = 1.86 %

milcah answered 6 months ago
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