Not everyone pays the same price for the same model of a car. The figure illustrates a normal distribution for the prices paid for a particular model of a new car. The mean is $20,000 and the standard deviation is $1000. Use the 68-95-99.7 Rule to find the percentage of buyers who paid less than $18,000. Number of Car Buyers 17 18 19 20 21 22 Price of a Model of a New Car (Thousands) ETTE 99.7% 95%- -68%- The percentage of buyers who paid less than $18,000 is %.

Please just answer D

The table below gives the number of hours spent watching TV last week by a sample of 24 children. 31 28 60 63 33 75 73 87 46 82 70 50 47 50 39 83 25 73 33 74 87 85 97 12 Range = Standard Deviation =

z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?

Find the mean and standard deviation for the individualized instruction s cores. Scores Individualized Instruction 50 - 59 60 - 69 70 - 79 6 80 - 89 11 90 – 99 6. Mean = (Round to the nearest hundredth.) Standard deviation =| (Round to the nearest hundredth.)

Listen According to Chebyshev's theorem, for a data set with a mean of 100 and a standard deviation of 5, which interval is guaranteed to contain at least 88.89% of the data set?

Ten friends kept track of how many times they sent a text over a one hour period. The results are in the table below. number of texts 5 6 7 7 8 10 10 15 16 17 They determine that the mean of the data set is 10.110.1, but they also want to know the range and standard deviation. Calculate the range of the data set.Is this correct answer 12? Calculate the POPULATION (since it's just two friends, they're the population) standard deviation of the data set.I have a hard time

The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4900. The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law. Do you think it would be unusual for an individual to pay a tax of less than $7800? Explain. Assume the variable is normally distributed. Round the answer to at least four decimal places.