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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?
If 37% of high school students said that they exercise regularly, find the probability that 5 randomly selected high school students will say that they exercise regularly.
At most times the metrics are low but they rise drastically when a child feels stress. The researcher wants to estimate a baseline level for the metrics.
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
Standard deviation of 0.17 ounces, assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more than 12.2 ounces?
Individual scores of a placement examination are normally distributed with a mean of 84.2 and a standard deviation of 12.8.
a) Set up the null and alternative hypotheses, and perform the hypothesis test. b) Does the jury selection system appear to be fair?
What are the best-case and worst-case outcomes the owner may face on this product if she implements your suggestion?
If people on your floor of dorm bought 425 of those tickets, determine the probability that someone on your floor will hold winning ticket?
Develop a hypothesis to investigate this problem based on the claim of the heat pump manufacturer
Some students see a steady price, while others see regular sales that temporarily cut the price. Students are asked the price they would expect to pay. This is an example of?
Assuming both assertions are correcting and assuming normal distributions, which review book is more likely to result in an SAT gain over 60 points?
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
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