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Assume that miles per gallon of gasoline for imported passenger cars (of a given engine displacement) are normally distributed with a known standard deviation of 3.1 miles per gallon, and a comparable figure for domestic vehicles having the same displacement is 4.7 miles per gallon. Suppose that nX = 42 imported and nY = 50 domestic cars are sampled and their average miles per gallon are 23.5 and 20.1, respectively. Find a 99% confidence interval for the difference µX - µY .
a survey found that people who took coldeeze at the onset of a cold suffered on average 42 hours. what proportion of
the claim size for a certain insurance policy is a pareto random variable with density function . the parameter is
1.i use computer software to do the following. i generate ten random numbers from a n500 100 distribution. from these
is there a relationship between the race of violent offenders and their victims? data from the u.s. department of
Determine whether the following equations have a solution or not? Justify your answer. What type of solution do you get for quadratic equations where D
Explore the descriptive statistics and draw some scatter plots. Does this meet the basic assumptions of regression?
confidence interval for the population mean.a sample of 49 items in a grocery store has an average fat content of 18.6
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
in a study of facial behavior people in a control group are times for eye contact in a 5-minute period. their times are
Write a paper of no more than 750 words in which you discuss the difference between comparative and ratio analysis. Differentiate and share the purpose and importance of each.
Use a rank correlation coefficient to test for a correlation between two variables. Use a significance level of α=0.05.
Avalon Bakery would like you to recommend how many loaves of its rye bread to bake at the beginning of each day. Each loaf costs the bakery $3.00 and can be sold for $6.00.
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