A new surgery is successful 85% of the time. If the results of 10 such surgeries are randomly sampled, what is the probability that fewer than 9 of them are successful? Carry your intermediate computations to at least four decimal places, and round your answer to two decimal places. (If necessary, consult a list of formulas.)

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 any one of three different lines that have formed at three teller windows. Answer the following questions.   Bank A 6.5 6.6 6.7 6.8 7.1 7.2 7.4 7.8 7.8 7.8   Bank B 4.1 5.3 5.9 6.2 6.7 7.6 7.6 8.6 9.2 10.0                                                                                                                                                                                         A.  Construct  a 90​%confidence interval for the population standard deviation σ at Bank A                                                                                                                                                                     _____min  <o Bank A < ______min…

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 any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.4 6.6 6.7 6.8 7.1 7.3 7.5 7.7 7.7 7.7 Bank B 4.2 5.5 5.7 6.2 6.7 7.8 7.8 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< OBank A min (Round 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.) Interpret the results found in the previous parts. Do the confidence intervals suggest a difference in the variation among waiting times? Does the single-line system or the multiple-line system seem to be a better arrangement? O A. The…

A popular, nationwide standardized test taken by high-school juniors and Españ seniors may or may not measure academic potential, but we can nonetheless attempt to predict performance in college from performance on this test. We have chosen a random sample of students just finishing their first year of college, and for each student we've recorded her score on this standardized test (from 400 to 1600) and her grade point average (from o to 4) for her first year in college. The data are shown below, with x denoting the score on the standardized test andy denoting the first-year college grade point average. The least-squares regression line for these data is 1.1239+0.0015x. This line is shown in the scatter plot below. Standardized test score, .x 1360 1100 790 1280 890 Grade point average, y 3.77 2.28 2.35 2.91 2.64 2.22 3.18 3.34 2.36 3.30 3.02 2.88 860 1400 1510 1000 1250 1060 1210 1020 940 1510 Send data to calculator ✓ Send data to Excel 3.07 2.29 3.01 Grade point average, 34- 324 900…

About 8 % if the U.S. population catches the flu each season. Assuming everyone has equal probably of catching the flu, about what are the odds of catching the flu in a given season?

On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up showing up to the game.  Assuming everyone present is sitting in a seat, what percentage of seats in the stadium are empty?

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 any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A 6.3 6.6 6.7 6.8 7.1 7.3 7.5 7.8 7.8 7.8 Bank B 4.2 5.5 5.9 6.3 6.7 7.7 7.7 8.5 9.3 10.0 Click the icon to view the table of Chi-Square critical values. Construct a 90% confidence interval for the population standard deviation o at Bank A. 7:6

A box contains many tickets, with an average value of 50 and an SD of 10. If we draw 150 times with replacement from the box and keep track of the sum of draws, what is the approximate chance that the sum of draws is smaller than 7400? Choose the answer that is closest. Group of answer choices 30% 20% 10% 40%