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To find the 99 percent confidence interval for population mean. A small town has a population of 20,000 people. Among these 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar. It is found that on average each person who regularly visits the bar spends about $1500 per year in the bar with a standard deviation of $120. Construct a 99 percent confidence interval around the mean annual expenditure in the bar.
Fit a multiple linear regression model for predicting the hospital duration using age, sex, body temperature, white blood cell counts, antibiotic use, blood culture and service
Use a scatter plot to determine the relationship between the x values and the y values.
For which of given variables must a "two tail" t-test be applied?
Create a 99% confidence interval estimate of population mean amount of paint included in a 1 gallon can.
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
The ANOVA summary table below is the result of a regression of sales on year of sales. Is the relationship statistically significant at .05? Comment.
A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
The following table shows the hardness (in Brinell hardness numbers) and the tensile strength (in thousands of pounds per square inch) of ten specimens of a certain alloy.
LPP using the graphical method. Solveout the following linear programming problem utilizing the corner point method.
Give a mathematical expression for the probability density function of driving distance.
Find the relative risk for moderate beer drinkers as compared to nondrinkers, finds the 95% confidence interval
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