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1. Give an example of a number that cannot be a correlation coefficient (Pearson's r) and is a negative number.
2. Interpret the following statement. A researcher collected data on the correlation between grades in a course and the number of absences in the classroom. The r = -.38.
a. Write a sentence interpreting these findings.
b. Write another sentence explaining the findings if the other variable is the number of hours spent working per week and the r = .06.
3. What must the P-value be in order to reject it? Explain yourself.
4. What affects the probability of a Type II error?
5. What could be the issues of a researcher not finding any statistical significance in their research results?
What is the 2001- 2012 compound growth rate? Using the result obtained in part a, what is your 2013 projections?
A two-tailed probability is .03. What is the one-tailed probability if the effect were in the specified direction? What would it be if the effect were in the other direction?
A student wants to measure the volume of liquid in cans of soft drink to see how it compares to the nominal volume of 12 oz. printed on the can. Suggest some sources of measurement error in this experiment, and discuss how the measurement errors c..
What are the theoretical parameters for the sampling distribution based on these 40 trains? Assume you are dealing with an infinite population of trains.
The simplest useful numerical description of a distribution consists of measure of center and measure of spread. The Median is the 50th percentile. Q: Why is not the Mean the 50th percentile?
In how many ways can Mom assign the jobs for you to complete
The Precision Scientific Instrument Company manufactures thermometers which are supposed to give readings of 0o C at the freezing point of water.
you play two games against the same opponent. the probability that you win the first game is 0.4. if you win the first
You will take either a basket-weaving course or a philosophy course, depending on what your advisor decides. You estimate that the probability of getting an A in basket weaving is 0.85, while in philosophy it is 0.60.
a shipping company claims its boxes can carry 36 lb. the production design allows the boxes to be uniform in
The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,250. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard d..
the equation for a regression line predicting the numbers of hours of tv watched by children y from the number of hours
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