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Test at the 0.05 level of significance whether the mean of a random sample of size n = 16 is "significantly less than 10" if the distribution from which the sample was taken is normal, = 8.4, and σ = 3.2. What are the null and alternative hypotheses for this test?
A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.
The KW water is provided to approximately 750,000 people, who are served through more than 362,000 accounts. All accounts are metered and billed monthly.
The following table gives in-state tuition costs (in dollars) for 15 randomly selected colleges taken from a list of the 100 best values in public colleges (source: Kiplinger's Magazine, October 2000).
for each pair of values state the decision that will occur and state whyp-value 0.014 a 0.02p-value 0.118 a
We will test to determine if there evidence of an improvement on the final examination, at the 1% significance level. What is the alternate hypothesis?
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
Determine the maximum error of the estimate, E. Determine the confidence level used for the given confidence interval.
the health department reports a 1 rate of the hiv virus for the at-risk population. under certain conditions a
The time between arrivals of cars at the Petroco Service Station is defined by thw following probability distribution.
the median property tax rate per 1 000 value for state a is 21 .42. a family is considering moving to state b and
Construct a 98 percent confidence interval for the true proportion of ranch style homes. (Round your answers to 4 decimal places.)
a. what model might you use to model the number of faulty cell phones produced in one day?
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