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Biologists within a national park use the fall rabbit population as a predictor of the following spring's fox population. In the fall of 2005 the rabbit population was 500 rabbits and in the spring of 2006 the fox population was 90. The statistical analysis predicted that there would be 104 foxes. Calculate the residual for that data point.
a) 410
b) 396
c) 90
d) 14
Based on past data, the Student Recreation Center knew that the proportion of students who prefer exercising outside over exercising in a gym was 0.734. To update their records, the SRC conducted a survey. Out of 95 students surveyed, 76 indicated..
Describe a situation in which correlation analysis or regression analysis can be (or was) misused to explain cause and effect relationship in a case of fortuitous correlation.
Why is it significant to be familiar with frequency distributions in the business world? Provide examples by using a distribution chart from a set of data.
Make sure you include a complete ANOVA summary table. Also, report the appropriate null and research hypotheses and the critical value (alpha = 0.05).
Average number of mosquitoes in pond is 80 per square meter with a standard deviation of 12. If 16 square meters are choses at random for a mosquiot count, find probabilty that the average of those counts is more than 83.0 mosquitoes per square me..
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
Answer the following three questions based on what you know about statistics now.
The data consists of random sample of 30 households from the 2007 American Community Survey. Construct a frequency distribution and a histogram for each data set.
Some people who bought X-game gaming systems complained about having received defective systems. The industry standard for such systems has been 98% non-defective systems.
A random sample of n = 16 scores is selected from a normal distribution with a mean of μ = 50 and standard deviation of σ = 10. a) What is the probability that the sample mean will have a value between 45 and 55?
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.
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