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But if she does not get an A, there is only a 11% chance that they will hire her. There is a 70% chance that Lucy will get an A in BUS 190. What is the probability that Lucy gets an A in BUS 190 and
Consider a sample and let for where c is some specified number. Give a general argument to show that the sample variance of the is identical to that of the . [Hint: How are and related? When trying
Let X and Y be random variables with joint probability density function (PDF) given by fX;Y (x; y) = c x y if x 0; y 0; x + y 2 0 otherwise (a) Find c. (b) Find E [XY ].
A block of mass m = 5.1 kg is pulled up a θ = 21° incline as in the figure with a force of magnitude F = 34 N. Find the acceleration of the block if the incline is frictionless
Two accounting professors decided to compare the variance of their grading procedures. to accomplish this, they each graded the same 10 exams with the following results.What is the H1?
A certain disease is found in one person in 5000. If a person does have the disease, the test will show a positive result 93% of the time. If a person does not have the disease, the test in 1 out o
Define another random variable Y to be the maximum value of either die in the pair. Write down the probability mass function of Y. Find the probability that Y is odd.
A game charges $1 to play and pays $4 if a card drawn from the deck is a face card (Jack, Queen, or King); if not the player loses the money. Find the expected value of the gain for the player.
Astronomers estimate that as many as 100 billion stars in the Milky Way galaxy are encircled by planets. If so, we may have a plethora of cosmic neighbors.
There are two variables in this data: number of police and number of crimes. Which variable is the dependent (Y) variable? Create a scatter diagram for this data. Paste it into this document below.
Identify the independent and dependent variables. Classify the level of measurement of each variable.
Each person picks 12 M&M chocolates from the bag. What is the test value? What kind of data analysis method would be appropriate for analyzing the data?
Thirty percent of all telephones of a certain type are submitted for service while under warranty. Of these, 70% can be repaired, whereas the other 30% must be replaced with new units. If a company
Use these data to compute the probability of suffering from persistent respiratory symptoms in each socioeconomic group. Assume that the numbers are large enough to satisfy the frequentist definitio
Compute the following binomial probabilities directly from the formula for b(x; n, p). (Round your answers to three decimal places.)
Let X be the damage incurred (in $) in a certain type of accident during a given year. Possible X values are 0, 1000, 5000, and 10000, with probabilities 0.84, 0.10, 0.04, and 0.02, respectively.
A cast a die a number of independent times until a multiple of 3 appears on the top side of the die. Find the probablity that more then seven casts needed to obtain the fist multiple of three?
Patrick took his sample and his average was 22.57. Now what is the probability that his sample average is more than 20? What is the probability that the true average turnaround time is greater than 20
A particle moves on 3 points situated on a circle. At each step it is equally likely to move one step clockwise or one step counterclockwise
What are the conclusions of the test if the error level is alpha=0.05? what type of error may have occurred? What are the conclusions of the test if the error level is alpha=0.01? what type of error m
Calculate the sample size needed given these factors:
An Economic Department at a state university with five faculty members-Anderson, Box, Cox, Carter, and Davis-must select two of its members to serve on a program review committee. Because the work w
If we have a uniform random variable that takes values between 7 and 10.5, the graph for the distribution would have a height of what?
A random variable X has a uniform distribution between 4 and 14. Find the probability that the random variable will take a value less than 7.8.