The life insurance industry maintains that the average worker in Saskatoon has nomore than $25,000 of personal life insurance. You believe it is higher. You sample 100workers in Saskatoon at random and find the sample average to be $26,650 of personallife insurance. The population standard deviation is known to be $12,000. Use ?=0.05throughout.c. (5) If the true average for this population is in fact $30,000, what is the probability ofcommitting a Type II error?
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.
The life insurance industry maintains that the average worker in Saskatoon has nomore than $25,000 of personal life insurance. You believe it is higher. You sample 100workers in Saskatoon at random and find the sample average to be $26,650 of personallife insurance. The population standard deviation is known to be $12,000. Use ?=0.05throughout.c. (5) If the true average for this population is in fact $30,000, what is the
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