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Is there an alternative test to the chi squared test? What if my results give an expected frequency below 5, which stats book states that these should be treated with caution? Is there a more appropriate stat test which would be more accurate in working out the significance of the results?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that:
Utilize the given degree of confidence also sample data to construct a confidence interval for population proportion.
Is it necessary to assume a normal distribution on the population to estimate the value of the mean spending per day? Explain.
How many degrees of freedom should the researcher use in her t-test critical value assuming that the variances are equal?
Your task is to interview a representative sample of attendees for the large concert venue where you work. The new season includes 200 live concerts featuring all types of musicians and musical groups.
The Skateworld Company operates ice rinks in several major cities throughout the United States. During each session of open skating, one customer is selected at random to receive a free pass for a future open skating session.
A Gallup Poll (June 9 to 12, 2008) interviewed a random sample of 822 adults (18 years or older). The people in the sample were asked about their level of confidence in a variety of institutions in the United States. Here are the results for small..
If he were to conduct a second study to reduce the maximum error of estimate to 6, about how many hard drives should he include in his new sample?
Give the 90% confidence interval for the mean score in the population of all young women.
When the effect of a level for one factor depends on which level of the other factor is present, use: Select one:
If the null hypothesis is true, then how much difference should be expected, on average, between the two sample means?
Obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram
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