Construct a 90% confidence interval for the population mean grams of fat per serving of chocolate chip cookies sold in supermarkets. (i) State the confidence interval. (Round your answers to two decimal places.) , (ii) Sketch the graph. (iii) Calculate the error bound. (Round your answer to two decimal places.)
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is
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Part (a)
Construct a 90% confidence interval for the populationmean grams of fat per serving of chocolate chip cookies sold in supermarkets.(i) State the confidence interval. (Round your answers to two decimal places.)
,
(ii) Sketch the graph.(iii) Calculate the error bound. (Round your answer to two decimal places.)
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