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Question: Five credit scores are 680, 680, 700, 720, 720. The data set is bimodal because the scores 680 and 720 each occur twice. Consider the annual earnings of workers at a factory. The mode is $25,000 and occurs 150 times out of 301. The median is $50,000 and the mean is $47,500. What would be the best measure of the "center"?
According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998.
There used to be an ad on TV that claimed one toothpaste was proven to be more effective in fighting tooth decay than another. One of statistics professors was interested in the study, and after 6 ads finally got the address to write away for it f..
a regression line was calculated as y 42.5 3.1 x. what is the predicted value of y when x 2.5
The Ohio Department of Highways is in the process of selecting a new paint for highway use. Four different paint companies have been contact regarding this need and each of the companies has supplied paint for testing.
Following is a computer output of an analysis of variance based on randomly chosen rents in four cities. Do you believe that the average rent is equal in the four cities studied? Explain.
a populations distribution is normal with a mean of 20 and a standard deviation of 5. a sample of 16 observations is
In contrast, the real millionaires, in terms of savings and investments, frequently come from "unglamorous" professions (particularly teaching), own unpretentious homes and cars, dress in inexpensive clothes, and othenvise lead rather ordinary liv..
A jar containing 100,000 marbles. There are 6 colors of marbles in the jar and they are present at frequencies of 2%, 2%, 4%, 10%, 57%, 25%.
What are the conditions under which a moving-average control chart is preferable? Compare the moving-average chart with the geometric moving-average chart.
A local group claims that the police issue more than 60 speeding tickets a day in their area.
the total blood cholesterol concentrations in mgdl are shown below for a random sample of six people. in the table
Suppose that a computer manufacturer receives computer boards in lots of five. Two boards are selected from each lot for inspection. We can represent possible outcomes of the selection process by pairs. For example, the pair (1,2) represents the s..
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