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Students were asked how many songs they had in their digital music library. Here's a display of the responses:
a) What aspect of this distribution makes it difficult to summarize, or to discuss, center and spread?
b) What would you suggest doing with these data if we want to understand them better?
In which of the following games of chance would you be willing to assume independence of X and Y in making a probability model? Explain your answer in each case.
when taking an exam some students quickly answer all the questions they know how to do. if they go back and revise
using an a 0.04 a confidence interval for a population proportion is determined to be 0.65 to 0.75. if the level of
Stat 11 Spring 2011 - Homework 8. I have stated several times in class that although people often focus on the mean, the spread or variation is often as or more important than the mean. Briefly describe how Gladwell's message supports my statement...
A few years ago, the Department of Education published information about education in the United States. It reported the average amount (dollars per student) spent by public schools in each state during the prior school year.
The mayor of a small town wants to conduct personal interview with small business owners to determine if there is anything the mayor could do to help improve business conditions.
Write the research hypothesis and the null hypothesis. Then construct a table like the one below, displaying the outcomes that would constitute Type I and Type II error. Write a paragraph explaining which error would be more severe, and why.
In a certain class, midterm score averages out 70 with an SD of 15, as do scores on the final. The correlation between midterm scores and final scores is about 0.40. The scatter diagram is football-shaped.
1 a pump is designed to move and deliver to a vertical distance of 80 m what energy per kg of water must be supplied by
The national sporting goods association conducted a survey of persons 7 years of age or older about participation in sports activities the total population in this age group was reported at 248.5 million with 120.9 million male and 127.6 million f..
The EPA will grant a tax credit if the city-highway mileage estimate is at least 31 mpg
The following companies are interested in conducting a market survey of their products/ services. Explain the possible sampling techniques that they might choose.
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