Obtain the required confidence interval for the difference between two population proportions. Assume that independent simple random samples have been selected from the two populations. A survey found that 31 of 60 randomly selected women and 38 of 73 randomly selected men follow a regular exercise program. Find a 95% confidence interval for the difference between the proportions of women and men who follow a regular exercise program.

Solve the problem.A researcher believes that the proportion of women who exercise with a friend is greater than the proportion of men. He takes a random sample from each population and records the response to the question, “Have you exercised with a friend at least once in the last seven days?” The null hypothesis is H0: pwomen = pmen. Choose the correct alternative hypothesis.

Find the indicated probability. Round to three decimal places.Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. Find the probability of exactly two girls in ten births.

Solve the problem.Which statement best describes the significance level of a hypothesis test?

Feature movie lengths (in hours) were measured for all movies shown in the past year in the U.S. The mean length of all feature length movies shown was 1.80 hours with a standard deviation of 0.15 hours. Suppose the length of a random sample of 20 movies was recorded from all movies released this year. The mean length of the feature length movies was found to be 1.72 hours with a standard deviation of 0.18 hours.In this example, the numerical values of 1.80 hours and 0.15 hours are .

Use the following information for the question. Male players at the high school, college and professional ranks use a regulation basketball that weighs 22.0 ounces with a standard deviation of 1.0 ounce. Assume that the weights of basketballs are approximately normally distributed.If a regulation basketball is randomly selected, what is the probability that it will weigh between 19.5 and 22.5 ounces? Round to the nearest thousandth.

From a random sample of workers at a large corporation you find that 58% of 200 went on a vacation last year away from home for at least a week.Which of the following statements are correct concerning the 95% confidence interval of (0.50, 0.66) of coworkers who went on a vacation last year away from home for at least a week?

The following numbers are inserted into an empty binary search tree (BST) in the given order:  7, 18, 4, 3, 6, 8, 22, 13, 11, 28   a. Left to right Level order traversal of the BST after all the items inserted in the above order [insertion] b. Left to right Level order traversal of the BST after deleting node 7 with inorder predecessor replacement for the two child case [deletion] c. The number of internal nodes (non leaf nodes) in this tree after step b. [internal]   Note: Please separate your answer with one whitespace, e.g. 1 2 3 4 …. and any valid replacement for deletion is acceptable.

Parte seconda. Scrivi una frase completa con le parole date (given). Usa la forma corretta del verbo. (2 punti) Orietta e Isabella / volere                                                                                                         .

Parte seconda. Scrivi una frase completa al superlativo usando le parole date (given). Usa le frasi della Parte prima come esempio. (2 punti)                il calcio / lo sport italiano