Provide an appropriate response.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. Suppose that 800 couples each have a baby; find (a) the mean: (b) standard deviation for the number of boys in the 800 babies: (c) Would it be unusual to have 800 couples give birth and 470 are baby boys?       Min Usual:      Max Usual:        Unusual (Y/N):

Provide an appropriate response.An insurance actuary asked a sample of senior citizens the cause of their automobile accidents over a two-year period. The random variable x represents the number of accidents caused by their failure to yield the right of way. a) Use the frequency distribution to construct a probability distribution. Accidents Senior Citizens Relative Frequency 0 4 1 3 2 12 3 3 4 2 5 1 b) Is it unusual for a senior citizen to have 3 accidents when failing to yield the right of way (Y/N)?

Provide an appropriate response. Is there a relationship between the raises administrators at State University receive and their performance on the job? A faculty group wants to determine whether job rating (x) is a useful linear predictor of raise (y).  Using the method of least squares, the faculty group obtained the following prediction equation, 

True or false: this mock quiz has been beneficial for your learning.

Find the indicated probability.The data set represents the income levels of the members of a country club. Find the probability that a randomly selected member earns less than $79,000. 97,000 115,000 73,000 124,000 76,000 97,000 79,000 67,000 142,000 187,000 70,000 88,000 133,000 76,000 115,000 106,000 79,000 151,000 64,000 106,000

Provide an appropriate response.The data below are the final exam scores of 10 randomly selected history students and the number of hours they slept the night before the exam. Find the equation of the regression line for the given data. What would be the predicted score for a history student who slept 7 hours the previous night? Is this a reasonable question? Round the regression line values to two decimal places, and round the predicted score to the nearest whole number. Hours vs Scores Hours, x 3 5 2 8 2 4 4 5 6 3 Scores, y 65 80 60 88 66 78 85 90 90 71  

Solve the problem.A human gene carries a certain disease from the mother to the child with a probability rate of 40%. That is, there is a 40% chance that the child becomes infected with the disease. Suppose a female carrier of the gene has four children. Assume that the infections of the four children are independent of one another. Find the probability that all four of the children get the disease from their mother. Round to the nearest thousandth.

Name the organelle that matches the description. This is an elaborate network of rods and accessory proteins found in the cytosol that support cellular structures and provide the machinery to generate various cell movements, as well as provide the “roads” for vesicular trafficking.

Suppose you sell sandwiches at a deli store.  Review of your sales transactions reveals that 73.5% of your customers choose turkey breast sandwiches, while the rest choose other sandwiches. (Round all answers to 4 decimal places). If five people are randomly selected, what is the probability that all will order a turkey breast sandwich? If five people are randomly selected, what is the probability that none will order a turkey breast sandwich?   If five people are randomly selected sandwich. What is the probability that at least one customer will order a turkey breast sandwich? If five people are randomly selected sandwich. What is the probability that at least one customer will NOT order a turkey breast sandwich?

A guidance counselor at a middle school collected the following information regarding the employment status of married couples within his school boundaries. 0 children 1 child 2 or more children Total Only Spouse #1 Works 172 79 174 Only Spouse #2 Works 94 17 15 Both Spouses Work 522 257 370 Total (Round all probability answers to 3 decimal places) For a randomly selected couple, what is the probability that both spouses work? For a randomly selected couple, what is the probability that a couple has only 1 child? For a randomly selected couple, what is the probability that a couple has two or more children AND both spouses work? For a randomly selected couple, what is the probability that a couple has no children OR only spouse #1 works? Would it be unusual to select a couple at random for which only spouse #2 works? (yes/no)