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A random dot stereogram is defined in Wikipedia as a "pair of images of random dots which when viewed with the aid of a stereoscope, or with the eyes focused on a point in front of or behind the ima
Two groups were tested. Group A was given only a verbal description of the embedded object. Group B was given the same verbal description, but was also shown a drawing of the object. The measured re
Are 14% of M&M candies yellow? Mars, claims that 14% of its plained candies are yellow and a sample of 100 such candies is randomly selected. Find the mean and standard deviation from the number
IN a survey 427 different women are randomly selected without replacement and each woman is asked what she purchased online. Responses consisted of whether clothing was identified. Determine whether
With a short time remaining in the day a UPS driver has time to make delieveries at three locations among the eight locations remaining. How many diffrent routes are possible?
Assuming that the population of interest is "large", for which of the following cases are you more confident about rejection your null hypothesis, or are you equally confident:
There are seven books in Twilight series. If the books are read in a randomly selected order what is the probability that they are read in the order that they were written?
12.4% of burglaries are cleared with arrests. A new policeman is assigned to five different burglaries. What is the probability that at least one of them is cleared with an arrest?
Because the final exam is so important she plans to use redundancy by bringing in 2 TI-84 calculators. What is the probability that she will be able to complete her exam with a working calculator? D
Assume that Google is hiring employees on the different business days of the week Monday through Friday with equal likelihood.
Suppose you are an art dealer. You specialize in buying paintings by unknown painters at auctions and re-selling them to museums and art galleries.
Assume that salaries are normally distributed, the standard deviation for brand managers in Houston is $19,900, and the standard deviation for brand managers in Los Angeles is $21,800.
Airlines sometimes overbook flights. Suppose that for a plane with 50 seats, 55 passengers have tickets. Define the random variable Y as the number of ticketed passengers who actually show up for th
According to the National Association for College Admissions Counseling and USA Today. 19.8% of college students take at least one class online. What is the probability of randomly selecting a colle
Is it unlikely for someone to use a credit card frequently? How are all of these results affected by the fact that the responses were obtained by those who decided to respond to the survey posted on
In San Francisco, 30% of workers take public transportation daily (USA Today, December 21,2005).
Assume the mean shift is 1.5sigma (sigma is the process standard deviation, that is, the standard deviation of individual observations), what is the probability of type II error under this mean shif
A sample of shoppers was selected and asked questions regarding consumer behavior. One of the questions asked was "Do you enjoy shopping for clothing?" Information regarding the responses is below:
A health researcher is interested in determining whether or not the speed at which people walk is related to their cholesterol levels. He picks 100 adult volunteers at random, checks their cholester
In the game of roulette, a steel ball is rolled onto a wheel that contains 18 red, 18 black, and 2 green slots. If the ball is rolled 25 times, find the probabilities of the following events.
Motorola used the normal distribution to determine the probability of defects and the number of defects expected in a production process. Assume a production process produces items with a mean weigh
The player plays a series of games which ends when the player successfully chooses the winning icon. For such a series of games, find (a) the probability that the player's total score is negative. (
You plan to invest $200,000 in stocks on the Toronto Stock Exchange. If you invest $2000 in any particular stock, your profit will be $400, $200, $0 or -$200 (a loss) with probability 0.25 each. The
Assume that the probability of a failure is the same for any two months and that the occurrence or nonoccurrence of a failure in any month is independent of failures in any other month.
The World Health Organization estimates that 5% of all adults in sub-Saharan Africa are living with HIV/AIDS. A survey takes a random sample of 1600 adults from all over sub-Saharan Africa. What is