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Twenty percent of all students who sit for the CPA exam pass it on the first time. If a random sample of 500 students sit for an exam find the probability that 18% to 23% of the students in the sample will pass it the first time.
Statistics and Probability, Statistics
If you flip five coins what is the probability that you will get at least three heads?
The mean of a population of raw scores is 50 (ox=18). What is the probability of randomly selecting a sample of 40 score having a mean above 46?
The number of accidents in a day in town A is given by X , and the number of accidents in a day in town B is given by Y . The joint probability function for X and Y Y is f ( x , y )=964 x ! y ! for x =0,1,2,3 an ...
A community hospital wants to estimate the body mass index (BMI) of its local population. To estimate the BMI with an error of at most 0.5 at a 95% confidence level, what sample size should they use? The standard deviati ...
An athletics coach states that the distribution of player run times (in seconds) for a 100-meter dash are normally distributed with a mean equal to 14.00 and a standard deviation equal to 0.2 seconds. What percentage of ...
Research Scenario: Children who experience chronic pain as a result of medical procedures are the focus of a psychiatrist's study. Specifically, the psychiatrist wants to measure whether a new program helps decrease fee ...
The height of 5th grade boys is normally distributed with mean μ=57 inches and standard deviation σ=2 inches. What is the probability that the height of a randomly selected 5th grade boy will be between 53 inches and 61 ...
Based on college data, scores on a certain test can be seen as normally distributed that can show the mean of 1524 and a standard deviation of 318. What percentage of scores are greater than 1842 and if needed round to t ...
Flyers, Inc., just paid an EPS of $4.9 this year. Flyers is expected to maintain a retained earnings ratio of 50% and ROE of 5.5% for the next five years. After the fifth year, ROE is expected to decrease to 3.3%. Applyi ...
A population has a mean u=81 and a standard deviation o=28. Find the mean and standard deviation of a sampling distribution of sample means with a sample size n=239. ux= ox=
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