Suppose that we have two manufacturing workers, Bob and Jane, who each produce machine parts. Bob can make an average of 5 parts of per hour, with a standard deviation of 3 parts per hour (thus a variance of 9 parts per hour squared). Jane can make an average of 6 parts of per hour, with a standard deviation of 2 parts per hour (thus a variance of 4 parts per hour squared).Let X represent the number of parts made per hour by Bob. Let Y represent the number of parts made per hour by Jane. a). Let Z represent the total number of parts made per hour by both workers. What are the expected value and variance of the total number of parts made per hour by both workers?b).Suppose the reason Bob makes fewer parts per hour with higher variability is that he is making a different type of part than Jane. Our company makes a $10 profit for each part made by Bob and $9 profit for each part made by Jane. Let W be the total profit in dollars per hour from parts created by both workers. Write out W in the form of a linear combination of X's and Y's. c). Find the combined average and variance for profit in dollars per hour created by the two workers.

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given

Name and describe the three most important measures of central tendency. choose the correct answer below. a. the mean, sample size, and mode are the most important measures of central tendency. the mean of a data set is the sum of the observations divided by the middle value in its ordered list. the sample size of a data set is the number of observations. the mode of a data set is its highest value in its ordered list. b. the sample size, median, and mode are the most important measures of central tendency. the sample size of a data set is the difference between the highest value and lowest value in its ordered list. the median of a data set is its most frequently occurring value. the mode of a data set is sum of the observations divided by the number of observations. c. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is the product of the observations divided by the number of observations. the median of a data set is the lowest value in its ordered list. the mode of a data set is its least frequently occurring value. d. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is its arithmetic average. the median of a data set is the middle value in its ordered list. the mode of a data set is its most frequently occurring value.