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ABC News conducts an election day poll by randomly selecting voting precincts in New York, then interviewing all voters as they leave those precincts. a. Does this sampling plan result in a random sample? Explain. b. Does this sampling plan result in a simple random sample? Explain.
a manager is trying to decide whether to buy one machine or two. if only one is purchased and demand proves to be
Using smoothing constant of w = .80, compute the value of exponentially smoothed series in 1983.
Solve for the following items: The point on the x-axis that is equidistant (equal distance)from (10,4) and (6,2).
The graduates find a job within 1 year of graduating. What is the probability that among 9 randomly selected graduates, at least 1 finds a job within 1 year.
Calculate the mean absolute deviation based on the 2-day moving average. You can have a forecast and an actual temperature.
1.the weight of medium-sized oranges selected at random from a large bin of oranges at the local supermarket is a
a computer retail store has 15 personal computers in stock. a buyer wants to purchase 4 of them. unknown to either the
by studying the grade distributions in calculus over several years it was determined that the probability of a student
Population and the sample proportion of grandparents as primary caregivers (-hat) is to be calculated. What is the mean of the sampling distribution of -hat?
The users are then timed in their ability to setup and program the DVD by performing a series of operations. Which statistical analysis technique should be used? What is the null hypothesis? Can the market researcher get an answer? Why or why not?
on a psychology exam with m 76 and s 12 tom scored 9 points below the mean mary had a score of x 70 and bill had a
Find the probability that not enough seats will be available. Is this probability low enough so that overbooking is not a real concern?
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