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A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least 26 miles per gallon. To see if the goal is being met, they check the gasoline usage for 50 company trips chosen at random, finding a mean of 25.02 mpg and a standard deviation of 4.83 mpg. Is this strong evidence that they have failed to attain their fuel economy goal?
a) Write appropriate hypotheses.
b) Are the necessary assumptions to make inferences satisfied?
c) Describe the sampling distribution model of mean fuel economy for samples like this.
d) Find the P-value.
e) Explain what the P-value means in this context.
f) State an appropriate conclusion.
The probability of accepting a lot that is 10% defective is .677. Does that mean, then, that the probability of rejecting the lot is 0.333?
What is the total expected annual inventory cost at the optimal order quantity? What is the re-order point?
a. Construct a scattergram for these data. b. What does the scattergram suggest about the relationship between x and y?
Find the probability mass function for the random variable.- What is the probability that the experiment proceeds for at least 4 rolls?
the initial research proposal will consist of the following six 6 items1.identify a business research topic2.define the
Post, present, and report a descriptive analysis for your variables, specifically noting the following:
Define and describe each of the measures of association: OR, RR, ANOVA, and Correlations (1 page) Provide an example of a study that uses each of the six types of analyses (OR, RR, ANOVA, correlations, chi-square, t-tests) (1 - 2 pages)
there are a lot of symbols so i am sorry if this is hard to read.qtheta hat qthetasuppose eq1eq2q. vq1sigma12
What's the approximate probability that your total is between 30 and 40 (that is, the average for the 10 dice is between 3 and 4)? Specify the model you use and the assumptions and conditions that justify your approach.
the weights in pounds of discarded plastic from a sample of households summary statistics are n62 x1.911 s1.065 use a
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating the person liked the taste.
a. What is the probability of a student correctly answering no less than 22 questions based solely upon guessing the answer to each question?
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