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The mean of sample A is significantly different than the mean of sample B. Sample A: 59 48 74 62 87 73 Sample B: 53 67 78 57 93 79 Use a two-tailed t-test of independent samples for the above hypothesis and data. What is the p-value?
market researcher gartner dataquest reports that dell computer controls 27 of the pc market in the united states.
question according to the statistical abstract of the united states there are 31.1 milshylions one-person households
Examples of the binomial and poisson distributions are all around us. Identify a real-life example or application of either the binomial or poisson distribution. Specify how the conditions for that distribution are met.
The store used ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?
In addition, the gender of the respondent is noted. After analyzing the results the following table of joint probabilities was produced: Find the probability that a customer who rates Windsor as excellent is a man. 0.45
In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random, and X is the number of voters that support this referendum, find the mean and variance of X.
If you randomly select 3 vials from the shipment, in how many ways can at least one of the 3 selected vials have a hairline crack if the order of selection does not matter?
When the level of confidence and the sample size remain the same, a confidence interval for a population mean µ will be wider, when the sample standard deviation s is small than when s is large.
in a survey 42 of the repsondents stated they talk to their pets on the answering machine or telephone. a vet believed
A newspaper conducted a statewide survey concerning a proposal to raise taxes to prevent budget cuts to education. The newspaper took a random sample (assume it is an SRS) of 1200 registered voters and found that 580 would vote to raise taxes. Let..
What is the probability the crew member earns: a. Between $20.50 and $24.00 per hour? b. More than $24.00 per hour? c. Less than $19.00 per hour?
A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounce. Is there enough evidence to support the consumer's conjecture at a = 0.05? First, identify the alternative and the null hypotheses.
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