Find the indicated probability
Assume the random variable x is normally distributed, with mean u= 74 and standard deviation q=8. Find the indicated probability.
30- P (x < 55)
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Find the following z-scores for the standard normal distribution. Round to three decimal places.
An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation o
Use the frequency distribution table to construct a probability distribution. 12- the number of hits per name played by a baseball player during a recent season.
Find the indicated area under the standard normal curve. If convenient, use technology to find area.
For each of the following hypothetical populations, give a plausible sample of size 4:
A Statistics professor assigned 10 quizzes over the course of the semester. He wanted to see if there was a relationship between the total mark of all 10 quizzes and the final exam mark.
In Keno, there are 80 balls numbered from 1 to 80, and 20 are chosen at random. If you play a double number, you win if both numbers are chosen. This bet pays 11 to 1, and you have very close to a 6% chance of winning.
What is the value of the sample test statistic? (Round your answer to three decimal places.) Find the P-value. (Round your answer to four decimal places.)
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