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Suppose that 34% of people have a dog, 19% of people have a cat, and 9% of people on both. What is the probability that someone owns a dog or a cat?
Identify the population parameter of interest in the survey. Give a point estimate of the population parameter. Set up H0 and Ha for testing whether the true percentage of TV viewers who find cable news to be better quality than network news differs..
a random sample of size 56 from a normal population showed a mean of 63 and a sum of squares of deviation from the mean
Find the t-value such that the area in the right tail is 0.02 with 19 degrees of freedom.
Sweetwater & Associates write weekend trip insurance at a very nominal charge. Records show that the probability that a motorist will have an accident during the weekend and file a claim is 0.0005. Suppose they wrote 400 policies for the coming we..
If appropriate, determine which methods differ in mean yields. At the 0.05 level of significance, is there evidence of a difference in the variation in yields among the different methods?
Evaluate how the following situations will affect the demand curve for iPods.(a) Income statistics show that income of 18-25-year-olds have increased by 10 percent over the last year.
a if a hotel has 26 king size beds 22 queen sized beds 28 double beds and 37 twin beds what is the probability that you
the variability in the value of a statistic from sample to sample is known as?characteristics of a sample are known
Explain the meanings of Ho and Ha in Hyphothesis Testing. When would Ho be accepted and when would Ho not be accepted? (Complete answer in no more than five concise sentences.)
The manufacturer wanted to determine if the tires were exceeding the guarantee. At the .05 significant level, it was concluded that the tires are exceeding the manufacturer's guarantee.
A sample is taken prior to a major election of likely voters. The null hypothesis is that the votes will be split 50/50. One candidate gets 54% of the support in the sample and the p-value for this sample is calculated to be 0.12.
a biometric security device using fingerprints erroneously refuses to admit 2 in 1000 authorized persons from a
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