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A random sample of 11 statistics students produced the following data where x is the third exam score, out of 80, and y is the final exam score, out of 200.
THIRD EXAM SCORE (X) FINAL EXAM SCORE (Y)65 17567 13371 18571 16366 12675 19867 15370 16371 15969 15169 159 A) Predict the final score if the person obtains a third exam score of 68.
B) Calculate the standard error of the estimate.
C) Give the percentage of variation explained by regression. 2. The regression line = 3 + 2x has been fitted to the data points (4,8) , (2,5) and (1,2). The sum of the squared residuals will be
the national freshman-to-sophomore retention rate has held steady at 74. a certain college has 499 of the 585 freshman
a major chain of food stores wants to determine the proportion of customers who buy on impulse. the company decided to
It is known from previous studies that the population variances are 4.1 and 5.0 respectively. Using a level of significance of .05, is there evidence that the first year female high school teachers are receiving lower salaries? Fully explain your ..
1. the mean of a normal distribution is 408 pounds. the standard deviation is 13 pounds. what is the area between 424
Construct a 95 percent confidence interval for the true mean. (b) Why might normality be an issue here? (c) What sample size would be needed to obtain an error of ±10 square millimeters.
Give an example of when the F-statistic would be a useful value in data analysis. Provide details of what you would measure and how the F-statistic would be used.
If the supermarket begins each morning with a stock of 61 cartons of eggs, approximately what percentage of days will there be a surplus of eggs?
Develop 95% confidence intervals for the proportion of all students, the proportionof male students, and the proportion of female students who were involved in sometype of cheating.
Using suitable probability model, calculate the probability of producing more than 3 faulty chips per hour.Explain the reasons for choosing your probability model.
suppose a point xy is chosen at random from the disk x2 y2 is less than and equal to 1. find the a marginal density of
If appropriate, use the Marascuilo procedure and α = .01 to determine which, if any, year groups are significantly different in the proportion of passengers who book tickets online.
a researcher designs a study to test the hypothesesnbsph0 u gt 28 versusha u lt 28. a ran- dom sample of 50
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