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The probability that any given person is allergic to a certain drug is 0.07. What is the probability that none of three randomly selected persons is allergic to this drug? Assume that all three persons are independent.
If he selects the three brands at random, what is the probability that he will select the following?
Is the z value positive or negative? Explain why it should be positive or negative.
Suppose a single pineapple is selected at random from last years crop. What is the approximate probability that it weighs more than 35 ounces show work.
The bottom 1.5% of students must go to summer school. What is the minimum score you would need to stay out of this group?
The population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
The 97.5% CI for mean changes in Group B minus mean change in Group A is (-4.7 to -0.9). Suppose we want to compute a two-sided p-value to compare the two groups.
The network is said to be robust if at least one of the three servers operate more than 2 years. What is the probability that the network is robust?
A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse?
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
When 338 college students are randomly selected and surveyed, it is found that 109 own a car. Find a 99% confidence for the true proportion of all college students who own a car.
What does a squared correlation coefficient represent? Also, does the strength of the correlation depend on the direction? Finally, does correlation imply causation.
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
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