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A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste.
a. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.b. Determine the p-value.
One box contains five red and six black marbles. A second box contains 10 red and five black marbles. One marble is drawn from box 1 and placed in box 2.
The score for people in general on this questionnaire is 75, with a standard deviation of 12. Using the five steps of hypothesis testing and the 5% significance level (alpha).
Estimate using three day weighted moving average. Estimate sales for the next day using a three-day weighted moving average where the weights
Write a paragraph summarizing the results of the analysis and determine whether the calculated values of chi-square are statistically significant
A tailor makes wool tweed sport coats and wool slacks. He is able to get a shipment of 150 square yard of wool cloth from Scotland each month to make coats and slacks
At the 5% level of significance, can we infer that branch A has a significantly higher proportion of satisfied customers than branch B?
In an exam, the mean score is 70 and the variance is 16. What is the probability that a student's score will lie within the "54 to 86" range?
Of 146 adults selected randomly from one town, 31 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.
What is an example of a research problem at your organization that would benefit from the use of either descriptive statistics or probability distribution statistics? Explain.
A company produces calculators in batches of 64. Four out of every 100 calculators are defective. State the random variable for this situation and list its values.
It has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its auditors is to monitor..
The number of lightning strikes in a year at the top of a particular mountain has a Poisson distribution with a mean of 4.2. Find the probability that in a randomly selected year, the number of lightning strikes is 0.
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