The IRS daims it takes an average of 3.7 hours to complete a 1040 tax form. Assume the time to complete the form is normally distributed with a standard deviation of 15 minutes or 0.25 hours. Use the Cumulative Z-Score Table to answer the following questions. Write your answer as a percent using 2 decimal places. What percent of people would you expect to complete the form in less than 3.45 hours? What percent of people would you expect to complete the form-in more than 3.45 hours? Vhat percent of people would you expect to complete the form in less than 3.4 hours?
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 IRS claims it takes an average of 3.7 hours to complete a 1040 tax form. Assume the time t
the form is normally distributed with a standard deviation of 15 minutes or 0.25 hours.
complete
Use the Cumulative Z-Score Table to answer the following questions.
Write your answer as a percent using 2 decimal places.
What percent of people would you expect to complete the form in less than 3.45 hours?
What percent of people would you expect to complete the form-in more than 3.45 hours?
What percent of people would you expect to complete the form in less than 3.4 hours?
What percent of people would you expect to complete the form in more than 3.4 hours?
What percent of people would you expect to complete the form between 3.4 and 3.45 hours?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff8703e3e-9eb4-4c47-a58f-2fecf5a670af%2Feb1d58ea-8a54-4984-b0ba-d14a0f44b8af%2F91pt93j_processed.jpeg&w=3840&q=75)
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