Find the z-value that corresponds to each percentile for a standard normal distribution. a) 25th percentile b) 50th percentile c) 90th percentile Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table.

30% of students take Physics 101 and 20% take Math146. Of the students who take Physics 101, 25% also take Math146. If a student is chosen at random find P( student takes Physics101 and Math146) O a. 0.3 O b. 0.2 O c. 0.25 O d. 0.83 One 0.075

Question Help ▼ The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter an one of three different lines that have formed at three teller windows. Answer the following questions. 7.9 7.9 7.1 6.7 Bank A 6.3 6.6 6.7 6.8 7.2 7.4 7.9 Bank B 4.2 5.3 5.8 6.2 7.6 7.6 8.5 9.3 10.0 Click the icon to view the table of Chi-Square critical values. Construct a 95% confidence interval for the population standard deviation o at Bank A. min < Opank A min (Round to two decimal places as needed.) Construct a 95% confidence interval for the population standard deviation o at Bank B min < OBank B min (Round to two decimal places as needed.) Internret the results found in the previous parts Do the confidence intervals suagest a difference in the variation amona waitina times? Does the sinale-line svstem or the multinle-line svstem seem to be a Click to select…

What kind of display is this?

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Multiple-choice questions each have 6 possible answers, one of which is correct. Assume that you guess the answers to 5 such questions. Use the multiplication rule to find the probability that the first four guesses are wrong and the fifth is correct. That is, find P(WWWWC), where C denotes a correct answer and W denotes a wrong answer. (round answer to 4 decimal places) P(WWWWC) What is the probability of getting exactly one correct answer when 5 guesses are made? (round answer to 4 decimal places) P(exactly one correct answer) = %3D