a. Let d denote the percentage change in price per share for company i where end of 1" quarter price per share beginning of 1" quarter prioe per shate beginning of 1" quarter price per share d = Use the sample mean of these values to estimate the percentage change in the stock price over the first quarter. Do not round intermediate calculations. Enter negative value as negative number, if any. -.06 (to 3 decimals) b. What is the 90% confidence interval estimate of the population mean percentage change in the price per share of stock during the first quarter? Do not round intermediate calculations. Enter negative values as negative numbers, if any. Confidence interval ( -0.1281 -0.011 ) (to 3 decimals) Interpret this result. The stock market experiences a decline in prices. Hide Feedback Partially Correct Hint(s) Check My Wor

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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.