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The diameter of the dot produced by a printer is normally distributed with a mean diameter of 0.002 inch. Suppose that the specifications require the dot diameter to be between 0.0014 and 0.0026 inch. If the probability that a dot meets specifications is to be 0.9973, what standard deviation is needed?
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
Suppose that nine additional firms will be added to the bankruptcy rolls during the next quarter. How many of those failures are likely to be attribute to fraud?
Calculate the measures of central tendency, dispersion, skew for your data. Display your descriptive statistical data using graphic and tabular techniques. Frequency distribution, Histogram.
Suppose that data is recorded for equal period of "before"-"after" time. Use 1% level for risk. Given processed data, explain what John must do.
Both parties agree that if the average score in this year's survey is greater than one hundred and eight they will increase the police force. Is this decision rule adequate? What is the Type 1 error of this rule?
Use the data to Compute a 90% confidence interval to estimate the population average difference. Assume that the number of passengers is normally distributed.
In the game of roulette, a ball is dropped into a spinning wheel, finally landing on one of the wheel's 38 different slots. The wheel has 18 black slots, 18 red slots, 1 green zero, and 1 green double-zero. Suppose the wheel has landed on red 9 ti..
How would you use the "margin of error" in estimating the percentage of all adults who think that Venetian blinds are the hardest to clean?
Compute the proportion p (hat) for your sample Show your computation. Find a 95% confidence interval for p. What is the margin of error in this confidence interval? What is the meaning of this interval with respect to your data and project?
Diamonds and Hearts are red and Clubs and Spades are black. Suppose you randomly select three cards from the deck. The outcome of interest is the colour of each of the selected cards.
Let X be net income of the AirCanada from the above described random experiment. Compute the probability function of X.
Your boss has determined that on Wednesday, 5 random employees on the line to have a chance to obtain a $25 bonus if they produce more XT34's than 84% of all other employees on the line.
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