Scores on an intelligence test for the age group 20 to 34 are approximately normally distributed with mean 110 and standard deviation 25. About what percent of people in this age group have scores b. Below 85? (Answer in 2 decimal places.) Answer: Blank 2% c. What percent of people ages 20 - 34 have IQs below 100? (Answer in 2 decimal places.) Answer: Blank 3% d. If only 1% of people in this age group have IQs higher than Elizabeth, what is Elizabeth's IQ? (Answer in 2 decimal places.) Answer: Blank 4

QUESTION 3 What percent of scores are below an SAT score of 560?

In the 1992 presidential election, Alaska's 40 election districts averaged 2038 votes per district for President Clinton. The standard deviation was 576. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(,)b. Is 2038 a population mean or a sample mean? Select an answer Population Mean Sample Mean c. Find the probability that a randomly selected district had fewer than 1842 votes for President Clinton. d. Find the probability that a randomly selected district had between 1997 and 2099 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.

The mean of the GRE psychology subject test is 619 (out of 990).  The standard deviation is 109. (a)  Find the first and third quartiles.  Round your answers to the nearest tenth.  The first quartile is Answer   .  The third quartile is Answer     (b)  What percentage of takers scored between 510 and 728?  Answer   %   (c)  What percentage of takers scored between 401 and 619?  Answer   %   (d)  What percentage of takers scored above 728?  Answer   %   (e)  Suppose I got a 590 on the test.  What is my z-score (round to the nearest hundredth)?  Answer

Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings, not including retirement savings?" The data in the table represent the responses to the survey. Approximate the mean and standard deviation amount of savings. EEB Click the icon to view the frequency distribution for the amount of savings Frequency distribution of amount of savings The sample mean amount of savings is $ (Round to the nearest dollar as needed ) Savings $0-$199 Frequency 344 The sample standard deviation is $ $200-$399 93 (Round to the nearest dollar as needed.) 65 $400-$599 $600-$799 24 $800-$999 10 $1000-$1199 $1200-$1399 1 Print Done %23 e here to search lyi

Minister of Education Inese Puuce measured the English test scores of every child in the Grand Duchy of Vidzeme.  Minister Puuce found that roughly the same number of kids got As and Fs, but very few children got Cs.  Does she have a normal distribution or not?  Why or why not?

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?