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A surgical technique is performed on seven patients. You are told there is a 70% chance of success. Find the probability that the surgery is successful for exactly five patients.
A hand of 13 cards is dealt at random and without replacement from an ordinary deck of 52 playing cards. Find the conditional pr that there are at least three aces in the hand, given that there
If Elyse and Jodi are roommates, what is the probability that parties for these two students are back to back?
Compute the probability of being dealt, at random and without replacement, a 13-card bridge hand consisting of 13 cards of the same unit?
What does it mean to say that your score on test one in statistics was in the 90th percentile? explain
A sample of 8 is to be picked from the box. In how many ways can a sample be selected so that at least 5 of the balls are red?
A set of data is normally distributed with a mean of 200 and a standard deviatioon of 50. What would be the standard score for a score of 100?
The name of each contestant is written on a separate card, the cards are placed in a bag, and three names are picked from the bag. Identify which type of sampling is used and why?
A bank has just made 200 car loans. The bank's records indicate that about 7% of their customers make late payments on their car loans. We will consider these 200 loans to be a random sample of all
Supposed that A, B, and C are mutually independent events and that P(A)=0.5, P(B)=0.8, and P(C)=0.9. Find the probabilities that exactly two of the three events occur.
Differentiate the interpretation of the p-value from the interpretation of a confidence interval in determining statistical significance.
Analyze the advantages and disadvantages of using a repeated-measures study (or within-subjects design), instead of a between-subjects design.
Use ActTemps to develop a point estimate of the number of minutes per day officeworkers waste trying to locate mislabeled, misfiled, or misplaced items. What is the sample standard deviation?
A hat contains n coins, f of which are fair, and b of which are biased to land heads with probability 2/3. A coin is drawn from the hat and tossed twice. The first time it lands heads, and the seco
What is the probability that the average number of lightning strikes per square kilometer per year for 10 randomly chosen square kilometers is 3.6 or less?
For a lawyer, 10 clients come to see her on average every day. The time of talking to each customer follows an exponential distribution of ? =2 customers per hour (Please note that the expected tim
Does this result provide enough evidence for you to conclude that the company is exceeding the safe limit? Use α = .01. Assume emissions are normally distributed.
A student parks his car illegally on campus for a period of exactly one hour. Parking enforcement personnel check the spot according to a Poisson process with an average of λ passes per hour
In how many ways can 3 named teams of 5 players each be chosen from a group of 15 people? How many unnamed teams?
Using a 1% level of significance, test the market researcher's theory. What is the probability of making a Type I error? If the market share is really .21 in New Zealand, what is the probability of
A study of MBA graduates revealed that they have several expectations of prospective employers beyond their base pay.
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 19. If 570 people take Grebex to lower their blood pressure, how many will encounter undesirable side ef
Use a Normal approximation to find the probability that 75% or more of the women in the sample have been on a diet.
The weights (in kilograms) of a group of crates being shipped to Panama are 95, 103, 110, 104, 105, 112 and 92. What is the mean deviation?
Describe the shape of the sampling distrubution of the sample mean x, do we need to make any assumptions about the shape of the population? why or why not?