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The length of time patients must wait to see a doctor in a local clinic is uniformly distributed between 15 minutes and 2 1/2 hours. What is the probability of a patient waiting exactly 50 minutes?
Discuss why the standard error for the distribution of sample means is smaller than the standard deviation of sample scores. Distinguish between within-group designs and between-group designs.
the mean of the sampling distribution of means is equal to the mean of the population. t-f and why or why
the average gas mileage of a certain model car is 27 miles per gallon. if the gas mileages are normally distributed
a statistics class consists of 24 students all but one of whom are unemployed or are employed in low paying part time
Consider the continuous random variable X, which has a uniform distribution over the interval from 20 to 28. The probability that X will take on a value between 21 and 25 is.
Her mean waiting time was 7.4 minutes. Assume that the standard deviation has been historically known to be 2.2 minutes. At the .05 significance level, test the claim that the mean waiting time is less than 10 minutes.
sampling plan for a movie promotion. advertising companies often try to characterize the average user of a clients
it is found that when a particular 4-sided die is rolled a 1 occurs 25.8 of the time a 2 occurs 24.6 of the time a 3
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why is the normality assumption not a problem, despite the very small value of p?
scores on the critical reading part of the sat exam in a recent year were roughly normal with mean 501 and standard
What is the probability that booking will require less than 2 hours? What is the probability that booking will require between 2 and 5 hours? What is the probability that booking will require more than 5 hours?
1. the following data represent the monthly cell phone bill for a persons phone for six randomly selected months.35.34
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