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A sociologist wishes to determine whether there is a relationship between the sex of a person and the amount of alcohol consumed. A random sample of 100 people is selected and the following data are obtained.
Alcohol consumption Total:
Sex Low Moderate High Male 25 18 20 Female 8 19 10 Total
At α = 0.10, can the researcher conclude that alcohol consumption is related to sex? What kind of Chi-Square test is this?
What is your conclusion regarding null hypothesis?
Construct the 90% and 95% interval estimates for the population mean weekly sales.
Computing the probability value using normal distribution - find the normal distribution
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
Election poll reported that applicant had n approval rating 31% with margin of error E of 4%. Create a confidence interval for proportion of adults who approved of applicant.
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
the probability that a household is both prosperous and educated is P (A and B) = 0.082. What is the probability P (A or B) that the household selected is either prosperous or educated.
Find a 95% confidence interval for the mean dielectric strength of the oil.
The Wilcoxon signed rank test is computed for the data and gives a value W + = 161.5. Using the Normal approximation (without the continuity correction) the P-value.
Calculate the mean and standard deviation for this set of data. Convert your answer back to dollars and cents and give the correlation value between number of beers consumed and BAC?
Consider the following situation describing layoffs at a manufacturing plant of the Monsanto Company. Does there appear to be a case of age discrimination between those laid off and those non-laid off?
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
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