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Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the margin of error? Only consider one of these changes at a time. Explain your answer with words and by referencing the formula.
Determine expected cell counts if null hypothesis is true and show them in a two-way table. Determine the chi-square() statistic?
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
What is the point estimate of the population standard deviation?
Do the data you obtained provide enough evidence to reject the claim? Use a 1% level of significance.
What is the probability that no more than two of the three are commercial successes?
To find the probability values in case of raw data, binomial, normal
Why is population shape of concern when estimating a mean? What does sample size have to do with it?
A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthf..
At the .01 significance level, can we conclude that there is more variation?
As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 220 applicants 14 failed the test. Develop a 99 percent confidence interval for the proportion of applicants that fail the test.
What is the probability that there will be more than three trucks either being loaded or waiting?
Determine a 99% confidence interval for mean pH in rainfall. How would you distinguish interval?
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