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An average of 500 people pass the California bar exam each year. A California lawyer practices law, on the average, for 30 years. Assuming these members remain steady, how many lawyers would you expect California to have in 2050.
Provide the factorial notation for the following experimental design. Two independent variables:
Then suppose that a sample of 4000 women had produced the sample mean 275, and again give the 95% confidence interval for the population mean. What can you say about the effect of sample size on confidence intervals?
Discuss the concept of statistical significance, including your understanding of what it means, why it is important, and how it can be used.
The manager is concerned that sales are slipping, after taking into account the average value of sales for four consecutive Saturdays being $4800.
Can it be concluded that, X, number of boys in two-child families of preeminent scholars, is binomiallydistributed? Let α=0.05.
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
Evaluate probabilities using the laws of probability, the standard normal distribution, t-distribution, or X2-distribution.
Find a 99% confidence interval for the population mean number of weekly miles.
Given that both balls selected are white what is the probability that bowl 3 was selected?
The American Bar Association conducted a survey in 1986 showed that the average income of lawyers in 1986 was $ 120,000. An investigator took a sample of 64 lawyers in 1990, produced a median income of $ 140,000 with a standard deviation of $ 24.5..
Find the point estimate p-hat and the margin of error for the confidence interval (0.444, 0.484)
An economic researcher would like to know whether he can reject the null hypothesis at the 0.10 level, that no more than 20% of the households in Pennsylvania make more than $70,000 per year.
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