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A university reports that the middle 50% of the SAT I math scores of its students were between 565 and 690, with half the scores above 605 and half below.
a. What SAT I math scores would be considered outliers for that university?
b. What can you say about the shape of this distribution?
The distribution is probably: approximately normal, skewed left, uniform or skewed right.
If a sampleof50 customers is selected on a given day, what is the probability, given your selected delivery time that fewer than 3 customers will receive a free newspaper?
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
Standard deviation of 24 min. What is the probability that a random sample of n=15 batteries results in a mean talk time of at least 330 minutes?
Differences in Descriptive and Inferential Statistics and analyze the differences between descriptive and inferential statistics.
From this data set, compute the sample mean, median, mode and midrange. Compute the 1st quartile and 3rd and interpret their meanings.
Choose a variable (such as number of daily admissions at a local theater or number of miles students have to commute daily to get to their college.) Before collecting the data, decide what a likely average might be, then complete the following:
A sample of 4 trucks is randomly selected. What is the probability that 2 of those tested have defective brakes.
Parents collected a simple random sample of the times that 81 college students required to earn their bachelor's degrees. The sample has a mean of 4.8 years and a standard deviation of 2.2 years. Use a 0.05 significance level to test the claim tha..
A marketing survey is conducting in which students are to taste two different brands of soft drink. Their task is to currently identify the brand tasted.
Suppose sps professors have an average life normally distributed of 82 years, with a population standard deviation of 5 years.
a) Compute a 95% Confidence Interval for the true population proportion of successes. b) Based on this analysis can you conclude that the new system meets the requirement? Explain your conclusion.
Find out coefficient of correlation between variables. Interpret the value.
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