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At a given alpha level, as sample size increases what happens to the level of computed t needed in order to reach statistical significance?
You decide to develop a regression model using order value, number of products, and location of the retailer as predictors. Find the model equation. Is it significant at α =0.05?
Can you describe a data set for which one would one would prefer to use the median rather than the mean and can you think of a situation for which the mean would be preferred to the median and the mode?
Recently, two students made worldwide headlines by spinning a Belgian euro 250 times and getting 140 heads-that's 56%. That makes the 90% confidence interval (51%, 61%). What does this mean? Are the conclusions in parts a-e correct? Explain your a..
Now calculate the probability that a success is obtained on each of the three respective trials and, therefore, demonstrate that the trials are dependent.
Find the probability of winning jackpot?
Construct a graph of the probability distribution of X. What is the probability that a child receives exactly three diagnostic services during and office visit to a pediatric specialist?
A gambler plays a game in which on each play he wins one dollar with probability p and loses one dollar with probability q = 1 - p. The Gambler's Ruin problem is the problem of finding the probability wx of winning an amount T before losing everyth..
In a chess tournament, n games are being played, independently. Each game ends in a win for one player with probability 0.4.
Which of the following is not true about the student's t distribution? It has more area in the tails and less in the center than does the normal distribution.
suppose the reaction time in seconds to certain stimulus is a continuous random variable x with cumulative distribution
The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows Poisson distribution with a mean of 9 tickets per day.
During the busiest time of the day, customers arrive at the Daily Grind Coffee House at an average of 15 customers per 20-minute period.
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