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More than half of all residents would prefer tolls on all motorways to be reduced by 25 cents, rather than receiving a $100 lower annual registration cost for their cars. Also assume that this was based on a poll where 562 of 1,040 participants indicated that they would rather have the reduced motorway tolls.
(a) Is there evidence that more than half of residents would rather have motorway tolls reduced by 25 cents than have their annual car registration lowered by $100. Justify with a hypothesis test at the 5% significance level.
suppose the sample size from the normal population is 11. also assume that the population standard deviation is
a sample of n 9 has a mean of m 72 with ss 162. use the sample to make a point estimate of u and to construct the 90
Which of the following models are appropriate to forecast a time series whose amplitude increases over time?
National average for 2-year leases is 30,000 miles. Select the suitable hypothesis.
Two swimmers, Angie and Beth, from different teams, wanted to find out who had the fastest time for the 50 meter freestyle when compared to her team.
slot machines are a very popular video game at casinos across the us. in a random sample of 400 men 260 rated slot
Design a decision rule to test the hypothesis that a coin is fair if a sample of 64 tosses of the coin is taken and a significance level of 0.05 is used.
review the following information from the article a cost-benefit analysis of the new orleans flood protection system by
a new no-frills airline runs a commuter shuttle service using a refurbished world war ii bomber. the two-propeller
The sponsor of the survey wants you to use the 95 percent confidence level. The estimate is to be within $100. How many families should be interviewed?
For an arbitrary random variable X, use the Chebyshev inequality to show that the probability that X is more than k standard deviations from its expected value E[X] satisfies
In addition to the sample size n, what population value(s) must be known to find a standardized score for a sample mean x‾?
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