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All standard IQ test scores are normally distributed and are set up so that the mean score is 100. However, the standard deviation differs from test to test. For example, the standard deviation on the Otis-Lennon test is 16, while the Cattell's standard deviation is 24. The following are three famous high IQ societies, with the number in parentheses showing what percent of the population qualify for membership (i.e., to be in the Triple Nine Society, you must have an IQ in the top one-tenth of one percent in the general population). For each society, determine what score is necessary on each of the two IQ tests listed above to qualify for membership.
a. Mensa (top 2%)
b. Intertel (top 1%)
c. Triple Nine (top 0.1%)
Critically discuss the probability that more than 175 cable households rate cable companies as good or excellent in quality transmissions?
LSAT scores are normally distributed, with a mean of 150 and s = 10.
20% of teenagers in a small town say they like reading news online. Suppose you randomly select 7 teenagers from the town and ask them whether or not they enjoy reading news online. Find the probability that at least 3 say they enjoy reading news ..
You are estimating the cost ($K) of optical sensors based on the power output of the sensor. Using the preliminary calculations from a data set of 8 sensors, determine the equation of the line. (Round your intermediate calculations to 3 decimal pl..
An independent testing services road-tested 36 of the automobiles.
Four young children were monitored closely over a period of several weeks to measure how much they watched violent television programs and their amount of violent behavior toward their playmates.
In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
What are the odds against drawing a card from an ordinary deck of cards and getting a spade?
Average Precipitation For the first 7 months of the year, the average precipitation in Toledo, Ohio, is 19.32 inches. If the average precipitation is normally distributed with a standard deviation of 2.44 inches, find these probabilities.
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84. The grade point average of students at UTK is 2.4 with a standard deviation of 0.84. Which university shows a more dispersed grade distribution?
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