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For college-bound high school seniors from a certain Midwestern city, math scores on the Scholastic Aptitude Test (SAT) averaged 480, with a standard deviation of 100.
Assume that the distribution of math scores is bell shaped and symmetrical.
a) What is the approximate percentage of scores that were between 380 and 580?
b) What is the approximate percentage of scores that were above 680?
c) Charlie scored 580 on the math portion of the SAT. What is the approximate percentage of students who scored lower than Charlie?
d) Betty scored 680 on the math portion of the SAT. What is the approximate percentage of students who scored higher than Charlie but lower than Betty?
Sources and Uses of Cash. State how each of the following events would affect the firm's balance sheet. State whether each change is a source or use of cash.
What is the probability that the mean breaking strength of the 3 untreated specimens is at least 25 pounds greater than the mean strength of the 3 treated specimens?
Each vehicle had the gallon of gas added to the empty tank and then driven until empty. Number of miles travelled for all twelve readings are below. Use data to compute the mean and median mileages.
The soap and detergent association issued its fifth annual clean hands report card survey for 2009.
When comparing the mean annual incomes for executives with a High School education or less and Undergraduate Degree, the 95% confidence interval shows an interval of 11.7 to 42.7 for the difference. This result indicates that
Develop four probability questions using the table that you as an instructor of statistics might ask a class of students for a test in probability.
You've administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items.
Critical Thinking: Discuss the implications of: magnitude (from 0 to 1); sign ( + or -); and probability versus causality for the Correlation Coefficient (also known as the Pearson Product-Moment Correlation Coefficient).
The bank credit card department of Carolina Bank knows from experience that 5 percent of the card holders have had some high school, 15 percent have completed high school, 25 percent have had some college
Assuming the manufacturer's claim is true, what is the approximate probability of observing a sample mean of 52 months or less?
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean price nationwide is $1.50 per gallon for self-serve regular unleaded.
To find the probability that exactly 25 of the computers will require repair, one would use what type of probability distribution?
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