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The average number of pounds of meat a person consumes a year is 218.8 with a standard deviation of 25 pounds. Assume normal distribution. if a sample of 40 people is selected, what is the probablility that the mean of the sample will be less than 224 pounds per year.
Prices (in dollars) were recorded for a sample of 60 randomly selected grocery items at each of the three supermarkets. In order to reduce item-to-item variation, the prices were recorded for each item on the same day at each supermarket. Identify..
Determine and evaluate the effect size and comment on the impact of proposed difference. Ask yourself and comment on your level of satisfaction with the "practical" significance of the findings.
Write a brief summary of the distribution of the area of homes.
suppose that a point x y is to be chosen at random in the xy-plane where x and y are independent random variables and
Downtown Fish Company believes that it has a market share of 25%. They survey n = 100 fish owners and ask whether or not Downtown fish is their regular brand of Fish food, of which 23 people say yes.
a local trucking company fitted a regression to relate the travel time days of its shipments as a function of the
Afterward, each mouse is given a hyperactivity rating score. The mean score was x_bar = 14.9 and s = 2.8. Give a 95% confidence interval for the population mean score μ.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this right interpretation for margin of error?
a variety of studies suggest that 10 of all people are left-handed. does the student survey data support this
constructing a histogram requires dividing the range of the data into class intervals or bins the recomended number of
A retail store manager is trying to estimate the average purchase transaction amount for a particular store. She takes a sample of 35 transactions and determines the mean purchase transaction amount from this same is $85 with a standard deviation ..
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
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