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Which of the following is true for a symmetrical distribution?
a. mean = mode
b. median = mode
c. the mean, median, and mode are all equal
d. mean = median
The sample resulted in a mean trading volume of > = 39.48. Assuming a population standard deviation of 15.07, compute the margin of error for a 95% confidence interval for mu.
In each month, the proportion of "Prize" bonds that win a prize is 1 in 11000. There is a large number of prizes and all bonds are equally likely to win each prize.
The McBurger restaurant chain claims that the waiting time of customers for service is normally distributed with a mean of 3 minutes and a standard deviation of 1 minute.
Parole board is examing five prisoners up for parole. let x= number of prisoners out of 5 on parole who become offenders. Find the probability distribution for x.
What is the difference between using a hypothesis test to solve a problem and using an Analysis of Variance test (ANOVA) to solve a problem? Give an example of each.
The population mean annual salary for first year faculty at SLU is $47,000. Assuming that the population standard deviation is $1800:
To carry out a validation study, an I/O psychologist is developing a regression equation from data collected from those hired two years ago
a system with 3 components is such that the system fails if at least one of the individual components fail.the
Using the empirical rule, what is the approximate percentage of the men between the following values? A. 176 cm and 186 cm B. 166 cm and 196 cm.
A study of postoperative pain relief is conducted to determine if drug A has a significantly longer duration of pain relief than drug B.
x you then repeat this procedure three more times. you learned in class that u_x = u can you conclude that the mean of the four sample mean will be equal to the population mean, 65? why or why not?
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why may you assume that this is a normal distribution?
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