he SAT scores are normally distributed with mean 1500 and standard deviation 300. What is the cutoff for the top 10% SAT scores? Answer to two decimal

Scores on an IQ test are normally distributed with a mean of 100 and a standard deviation 15. what is the IQR of the IQ score?

Find SAT Quartiles. SAT scores are reported on a scale from 600 to 2400. The mean is 1498 and the standard deviation is 316. The quartiles of any distribution are the values with cumulative proportions 0.25, and 0.75. What are the quartiles of the distribution of SAT scores?

SAT : MEAN IS 500 STANDARD DEVIATION IS 100 ACT: MEAN IS 20 STANDARD DEVIATION IS 6

The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inches

A Gallup poll wants to determine the mean number of books Americans read each year. How many subjects are needed to estimate the average number of books Americans read with a margin of error of 0.52 books with 90% confidence?Initial results of the Gallup poll indicate that the population standard deviation is 9 books.Round your answer up to the next integer.

what is your SAT score if scored in the 95th percentile? mean:1000 standard Deviation: 250

A Gallup poll wants to determine the mean number of books Americans read each year. How many subjects are needed to estimate the average number of books Americans read with a margin of error of 0.77 books with 95% confidence?Initial results of the Gallup poll indicate that the population standard deviation is 6.2 books.Round your answer up to the next integer.

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.  What is the minimum IQ required to be able to correctly claim to be in the "top 5%" of IQ scores. Round to the nearest whole number.

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?