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Another sample of candies was opened and recorded the


Scenario

Another sample of candies was opened and recorded. The sample size was 20. Below is the summary of the sample.

Color

Red

Blue

Green

Yellow

Orange

Total

Mean

3.65

2.25

2.75

3.45

2.4

14.5

Standard Deviation

2.23

1.97

1.77

2.01

2.14

3.56

Using that information, construct the following:

  • A 90% confidence interval for the mean number of red candies.
  • A 95% confidence interval for the mean number of blue candies.
  • A 99% confidence interval for the variance of orange candies
  • A 90% confidence interval for the standard deviation of the total number of candies.

Hint: The Excel functions confidence.norm() and confidence.T() can be used to find the margin of error E quite easily. Also, you might want to use the following calculators in Statcrunch:

  • Stat- > Z Statistics -> One Sample
  • Stat -> T Statistics -> One Sample
  • Stat -> Proportion Statistics -> One Sample
  • Stat -> Variance Statistics -> One Sample

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Anonymous user

2/5/2016 6:05:09 AM

I need a scenario of sample of candies and using that information, construct the given: 1) A 90% confidence interval for the mean number of candies of red color. 2) A 95% confidence interval for the mean number of candies of blue color. 3) A 99% confidence interval for the variance of candies of orange color 4) A 90% confidence interval for the standard deviation of the total number of candies. The marking of this assignment will be based on answer quality and logic of the paper.