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Which of the following is a correct statement about a probability? A. It may range from 0 to 1. B. It may assume negative values. 1. Which of the following is a correct statement about a probability? A. It may range from 0 to 1. B. It may assume negative values. C. It may be greater than 1. D. It cannot be reported to more than 1 decimal place.
If the interval of tiem between eruptions is normally distributed with standard deviation 21.25, then what is the probability that a randomly selected time interval between eruptions is longer than 95 minuntes.
Can the formal hypothesis testing approach be used for nonparametric tests? How are parametric and nonparametric statistics different?
What are the null and alternate hypotheses? How many treatments are there? What is the critical value of F at the 5% level of significance? Indicate in words when you would reject the null hypothesis.
Three cards are randomly selected from an ordinary deck of cards without replacement Compute the probability that the first card is a spade given that the second and third are spades.
Find a 99% confidence interval for the difference in the mean number of calls between night and day.
The height of women at a school are basically distributed with mean 66.4 in. and standard deviation 3.7 in. Determine the range of heights centered about the mean in which:
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000.
Would a normal model be appropriate to describe the distribution of sale prices?
To investigate whether female executives are experiencing pay-discrimination, a researcher samples the incomes of 300 male and 300 female executives. Which procedure would be appropriate?
Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean of 24.80 mpg and a standard deviation of 6.2mpg for highway driving. Assume that a normal model can be applied.
Find the sample mean and sample standard deviation of the amount citizens spend per year. When finding a confidence interval for the true mean spent of ALL citizens, should we use a z-score or a t-score? Why?
Using a random sample of 100 newly-packed Chococake, it is found that the mean shelf life is 154 hours. Can the cake house manager conclude that the new packaging technique is efficient at 0.01 significance level?
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