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In ANOVA, what does F=1 mean? What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics?
Compute the value of the proportion of the population.
Find the minimum sample size needed, using a prior study that found that 36% of the respondents said they have high speed Internet access.
Whether regression can be used to estimate the Demand from other data in the file. So that Howies can determine the daily supply in a more cost effective way.
Utilizing the 5% level of significance was there a significant change in cholesterol level. Elucidate your answer to someone who has never ever taken a course in statistics.
In a mobile phone shop on a Sunday morning, out of n = 77 customers x = 19 buy a mobile phone. What is the 95% confidence interval for the proportion of customers buying a mobile phone?
Create a hypothesis and write out the eight steps used to apply a statistical test to your hypothesis.
What percentage of observations of a normal distribution are represented by the mean plus or minus 1.96 standard deviations?
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
A certain random experiment can result in one of four different possible outcomes, which we'll call A, B, C and D.
If you were designing a study which group, a population or a sample, would you gather data from and why? Provide an explanation regarding whether or not the standard deviation is a biased or unbiased estimate.
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
Note down a research that requires a decision making with probabilities.
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