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American sports fans often complain about the lack of scoring in soccer. In particular, many Americans feel that scoreless ties occur way too often. An avid fan of soccer is determined to set the record straight by showing that less than 10% of all professional soccer matches end in a scoreless tie. He collects a random sample of 300 professional matches and finds that 25 of them ended in a 0-0 draw. Use this sample data to test the claim that the proportion of all soccer matches that end in a scoreless tie is less than 10%. Use .05 as your level of significance. Be sure to report your p-value and write an interpretation of your results.
Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?
a physician wants to develop criteria for determining whether a patients pulse rate is atypical and she wants to
The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.
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..
project k costs 70000 its expected cash inflows are 16000 per year for 8 years and its wacc is 13. what is the projects
because only two of the seven regression coefficients are statistically significant. Yet in some initial trials the expanded model is giving more precise sales predictions than the smaller model. The reasons for this anomaly are now being investig..
an electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with
There are 20 qualified applicants for 5 trainee positions in a fast-food management program. How many different groups of trainees can be selected?
Reggie Miller of the Indiana Pacers is the National Basketball Association's best career free throw shooter, making 89% of his shots. Assume that late in a basketball game, Reggie Miller is fouled and is awarded two shots.
for 11 repeated independent trials with constant probability of success 0.4 for all trials find the probability of
He assigns a B to students who score between 1 and 2 standard deviations above the mean and a D to students who score 1and 2 standard deviations below the mean. All other students get a C. What percent of the class receives each grade assuming the..
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
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