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From a box containing 4 dimes and 2 nickels, 3 coins are selected at random without replacement. Find the probability distribution for the total T of the 3 coins. Express the probability distribution graphically as a probability histogram.
A random sample of 56 people measured accuracy w/ positive errors representing watches that are ahead of the correct time and negative rep. those behind the time.
A new company is manufacturing light bulbs. The CEO claims that the average light bulb lasts 260 days. A researcher selects 25 bulbs for testing. The sample bulbs last an average of 250 days with a standard deviation of 20 days.
Use the significance level of alpha = .05 to test claim that p > .5. Sample is simple random sample n = 50. Illustrate how to compute beta for test and suppose true population proportion is .6.
Consider two urns with the following composition: Urn 1 contains 5 red and 15 black balls, Urn 2 contains 8 red and 12 black balls.
Three coins are tossed simultaneously, consider the event E "Three heads or three tails" F " At least two heads" and G "Atmost two heads " of the pairs (E,F), (E,G) and (F,G), which are independent? Which are dependent?
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
A group of items of data have been found to be normally distributed with a mean of 80 and a standard deviation of 6. Please convert 80 to a z-score and show the calculation.
Girl B throws 15 times, with a prob. of success = 0.2. And girl C throws 20 times, with a probability of success equal to 0.1. Determine the probability that the target will get hit at least 12 times.
In his report to the mall management, can he say that shoplifting is twice as likely to be the cause of the loss as compared with either employee theft or poor inventory control and that employee theft and poor inventory control are equally likely..
If 3 different factor levels show a lot of variation between levels this implies:
instructions perform the 5-step hypothesis testing procedurehere are the steps that need to be followed amp the raw
A comparison between products manufactured in China VS Mexico and their perceived quality to the US consumer based on manufacturing location.
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