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Can the value of the mean, median, or mode of a set of scores ever be negative? Explain.
Give the mean and standard deviation of the distribution in part a, and show how they are calculated. Calculate the probability that from 10 to 12 of the men (i.e. 10, 11, or 12 men) have high blood
A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given in the accompanying table.
The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following.
An individual who has automobile insurance from a certain company is randomly selected. Let Y be the number of moving violations for which the individual was cited during the last 3 years. The pmf o
Determine the value of c so that the following functions represent joint probability distributions of the random variables X, Y a:f(x,y) = cxy for x = 1,2,3; y=1,2,3 b) f(x,y) ' c|x-y|, for x=-2,0,2
Suppose small aircraft arrive at a certain airport according to a Poisson distribution with a rate of 4 per hour. Find the probability that there will be more than two arrivals in an hour.
In an integrative research review of an interventions effectiveness, which statement is true of an inclusion statement is true of an inclusion statment limiting studies to randomized experiments (as
Researchers can run t-tests on which type of variables?
In a two-group intervention study, what is the meaning of a t-test with p value of 0.03 result?
One prominent physician claims that 70% of those with lung cancer are chain smokers. If his assertion is correct, the probability that 3 out 5 of such patients are chain smokers is?
Suppose we choose independently 25 numbers at random (uniform density) from the interval [0, 20]. Write the normal densities that approximate the densities of their sum S25 and their average A25.
A fair coin is tossed 100 times. What does the Chebyshev inequality tell you about the probability that the number of heads that turn up deviates from the expected number by three or more standard d
A sample of 25 novels has a standard deviation of 9 pages. Find the 95% confidence interval of the population standard deviation. (LET SD be the symbol for standard deviation as in sigma)
What reaction time will 99.99% of the drivers be faster than? 80% of the driver reaction times will be slower than what reaction time?
Two non-repeating letters and two numbers will be used to form an identification badge. The letters are "A" through "K" and the last number MUST BE EVEN. How many different identification badges are
In a dice game, if a players rolls a 5 or a 7 she wins $10.00. if she rolls a 9, she wins 5.00 .. the cost to play the game is $2. What is the expection?
What is the probability that you come out even of win money after playing just one game? What is the expected monetary gain or loss to you for playing this game?
Also, please show steps using excel or by hand on how to find if this is a right tailed T-test, how to find the hypothesized mean difference, t stat, and p-vale.
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation is 100 hours. A random sample of 64 light bulbs indica
Suppose that we have ratings of a restaurant from a sample of 72 customers. Each of the ratings is either "poor," "fair," "good," or "very good," Please state and then explain which of the followin
Give your answer using the theoretical efficacy of the pill. Please use 4 decimal places. Give your answer using the real efficacy of the pill. Please use 4 decimal
The mean errors per page made by a clerk in the word processing pool for a large company is thought to be 2.4 with the numbers of errors distributed according to a poisson distribution. what is the
What is the probability that in a group of 10 people from this population, exactly 7 are have blond hair? How to calculate the probability that in the group of 100 people from this population at least
Assume that you researched insurance industry statistics and found out that the probability of major accident is 0.05%, and that the probability of a fender bender is 0.16%.