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What is an example of two variables that are likely to be correlated because they are both changing over time?
A study of employees at a large company found a negative correlation between weight and distance walked on an average day. In other words, people who walked more weighed less. Do you conclude that walking causes lower weight? Can you think of an alternate explanation for the findings?
Computing relative frequencies in a contingency table and a survey of a sample of 347 people is conducted. The survey's respondents are classified according to their political affiliation and their opinion on a bill.
Suppose we drew a histogram of these 18 death rates using class intervals 1 — 1.9, 2 — 2.9, 3 — 3.9, 4 — 4.9 and 5 — 5.9. Using the histogram, we would
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work so I can see how to do this for the future. This one is good example of what I can do in future for real estate.
Then test to see whether it considerably varies from 0 [use alpha = 5%]. Don't forget to identify the null and alternative hypotheses.
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
determine if the improvement is of practical significance one should. Crop researchers plant 100 plots with a new variety of corn. The average yield for these plots is x' = 130 bushels per acre
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
Developing project network using AOA that determines completion times.
Estimate the 95% confidence interval for the proportion of the electorate that support this policy.
Which one of these statements concerning the creation of frequency tables for integer data is true? The procedure for creating them is the same as that for creating tables for qualitative data.
Estimating the individual score using normal distribution - blood pressure higher than what amount?
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