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A sample of 140 golfers showed that their average score on a particular golf course was 93.38 with a standard deviation of 4.36.Answer each of the following (show all work and state the final answer to at least two decimal places.):
A) Find the 90% confidence interval of the mean score for all 140 golfers.
B) Find the 90% confidence interval of the mean score for all golfers if this is a sample of 95 golfers instead of a sample of 140.
C) Which confidence interval is smaller and why?
The accounting association has 15 members, 10 of which are CPAs. The members are to be selected to study ways to increase membership. What is the probability of all three selected are CPAs?
Suppose today's sample yielded a mean of $4.19 and a standard deviation of $0.10, create and interpret a 99% confidence interval for the population standard deviation. Assume the distribution of gas prices in the area follows a normal distribution..
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Determine 95% confidence interval evaluate for average number of years served by all Supreme Court justices?
Which of the following statements isn't a property of the normal probability distribution? Please explain briefly why
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What is the 25th percentile of a chi squared distribution with 20 degrees of freedom? What symbol is used to denote this value?
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
As you know, the percentile for a value is a measure of where that value stands with respect to the rest of the data. As a criterion for college admissions, why would many schools use a percentile value for a standardized test, rather than a raw s..
A radio station that plays classical music has a "By Request" program each Saturday night. The percentage of requests for composers on a particular night are listed below:
Some people who bought X-game gaming systems complained about having received defective systems. The industry standard for such systems has been 98% non-defective systems.
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
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