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A hypothesis test is to be used to help determine if there is a difference between the proportion of 2 year college students and private university students that work at least 20 hours per week. Give the test value if a recent survey reported that in a sample of 300 student who attended two year colleges, 105 work at least 20 hours a week and a sample of 225 students attending private universities only 20 students work at least 20 hours per week.
They estimated the proportion of students at the university who prefer outdoor exercise as (0.5745, 0.8217), with 95% confidence. Which of the following is an appropriate interpretation of this confidence interval?
Random samples of 25 observations were selected from each of 3 populations. For these data, SSTR= 120 and SSE = 216.
Forecast the number of deliveries utilizing exponential smoothing constant for different values also compare it. A hospital records the number of floral deliveries its patients receive every day.
To test whether there is significant mean difference between two groups using independent sample t test.
Define the Linear programming problem (LPP)
Create a scatter diagram and consider the correlation for the given data. Create a scatter diagram and sketch the line you think best fits the data.
Illustrate what was the lowest score earned on the exam. Explain how many students scored within 3 standard deviations of the mean.
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
A population has mean 325 and variance 144. Suppose the distribution of sample means is generated by random samples of size 36.
Illustrate is the range of values for a coefficient of correlation. Illustrate degree of relationship do values of the correlation coefficient (r)with magnitudes close to 1.00 indicate.
If true explain and if false give an example. a. The significance level of a statistical test is equal to the probability that the null hypothesis is true. b. If the significance level of a test is decreased, the power of the test would be expected t..
Based on this sample information find out what percent of variation in starting salaries is described by GPA, and find out the equation that would forecast salary from GPA. Give a scatter plot.
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