On any given test, there is a 41% chance that a student will get a B or better. A teacher randomly selects tests until there is a B or better. Assume the selections are independent. What is the probability that it will take exactly 4 selections to get a B or better? What is the probability that it will take more than 3 selections to get a B or better?

The tourism industry’s main job is to cater to customers who 1. travel for pleasure 2. seek the fanciest place to stay overnight 3. want an exquisite dining experience 4. desire to take part in a recreational activity.

In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network site. six of 10 teenagers said they use mybook as their primary social network site. a 95% confidence interval to estimate the true proportion of teenagers who use mybook as their primary social network site is found to be (0.2964, 0.9036). which of the following is a correct interpretation of the confidence level? ninety-five percent of all samples of this size would yield a confidence interval of (0.2964, 0.9036). there is a 95% chance that the true proportion of teenagers who use mybook as their primary social network site is in the interval (0.2964, 0.9036). ninety-five percent of the time, the procedure used to generate this interval will capture the true proportion of teenagers who use mybook as their primary social network site. ninety-five percent of all the samples of size 5,000 lie in the confidence interval (0.2964, 0.9036).

Researchers are conducting a study in an attempt to establish a linear relationship between the number of online music video views and the number of guitar sales. a computer output for regression is shown and is based on a sample of seven observations. predictor coeff st. dev t ratio p-value constant 7.85671094 1.316226455 5.969118 0.001889 music video views 0.094781123 0.027926367 3.393965 0.019378 what represents the 99% confidence interval for the slope of the regression line? 0.0948 ± 3.499(1.3162) 0.0948 ± 4.032(1.3162) 0.0948 ± 3.707(0.0279) 0.0948 ± 4.032(0.0279)