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The route used by a certain motorist in commuting to work contains two intersections with traffic signals. The probability that he must stop at the first signal is 0.39, the analogous probability for the second signal is 0.49, and the probability that he must stop at at least one of the two signals is 0.75. What is the probability that he must stop
(a) At both signals?
(b) At the first signal but not at the second one?
(c) At exactly one signal?
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
When modelling E(y) with single qualitative independent variable, number of 0 - 1 dummy variables in model is equal to number of levels of qualitative variable.
A company supplies poultry farmers with hens, advertising that a mature B300 Layer produces eggs with a mean weight of 60.7 grams. Suppose that egg weights follow a Normal model with standard deviation 3.1 grams.
Components shipped include 0.5% defectives. You plan to select 80 items; if 0 are defective, you will assume all are okay.
If you arbitrarily grab 2 socks out of drawer determine the probability that you grab a matching pair?
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating the person liked the taste.
A job placement director claims that the average starting salary for nurses is $24,000. A sample of 35 nurses has a mean of $23,450 and a standard deviation of $400.
A regression equation was computed to be Y'=35+ 6X. The value of the 35 indicates that
Flip the tree. Label all endpoints, supply all branch probabilities, and calculate and label an endpoint probabilities.
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
The study compared the number of Hm-2 gene mutations in each group. The data table is below.
No estimate of the population proportion is available. How large a sample is required?
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