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If the correlation coefficient r is equal to 0.726, find the coefficient of determination and the coefficient of non-determination.
If the correlation coefficient r is equal to 0.476, find the coefficient of determintation.
If the equation for the regression line is y'=7-9X, then a value of x=-1 will result in a predicted value for y of
Determine the number of recorders the manager should order each month to meet 90% of customer demand.
Hannah selected a simple random sample of all adults in her town and, based on this sample, constructed a confidence interval for the mean salary of all adults in the town. However, the distribution
Suppose that you are conducting a study on the effectiveness of a new teaching method and that you wish to use a hypothesis test to support your claim regarding the mean test score under this method
Determine the most conservative critical value for a one sided Smith-Satterthwaite test at alpha=0.05 given var1=4, n1=4, var2=8, n2=4?
Part b Using the information from the previous problem, what is the probability that no more than 1 person will say they have a smart phone?
Should you use a binomial distribution? Please give a reason for your answer. In a random sample of students X is the number of hours a person studies.
A software developer is interested in finding what the best color theme should be for an engine diagnostic program for the flight line.
A normal population has a mean of 20. after an experimental treatment, a sample yields the following scores: 15,25,30,20 and 22. What is the t-score for a hypothesis test for the effect of the treat
A manufacturer of automobile purchases machine bolts from a supplier who claims that no more than 5% of suppliers bolts are defective. From a sample of 400 bolts, it is found that 28 are defective.
An equiprobable approach goodness of fit test with 9 cells for sample data that is normally distributed with a mean of 10 and a std of 2, would have how many degrees of freedom for the critical valu
Let W1 and W2 be independent geometric random variables with parameters 0.2 and 0.4. Find
Estimate the average life expectancy in the United States in the year 1956 according to the linear model in part (a). Average life expectancy in 1956?
Additionally, a random sample of 1000 registered voters in the southern half of the state is selected, of which 475 support the candidate. Reference: Ref 20-1 The estimate for the proportion of regi
If you collect data at any ONE restaurant, the correlation between the amount of food served per person and the price paid for it should be:
A confidential and voluntary survey conducted in STA 3024 in the Spring of 1999 asked the students questions about their sex life. A simple linear regression analysis was conducted to predict the nu
Find the equation of the Least Squares Regression line if:
A survey of Statistics undergraduate at Prosperity University completed a survey that asked for their Verbal and Math SAT scores. They wanted to predict the verbal score based on the math score. The
If you collect data at SEVERAL restaurants, mixing both the expensive "gourmet" type and the cheap cafeteria type, the correlation between the amount of food served per person and the price paid for
From 1975 to 1986, the General Social Survey asked its participants if they favored or opposed capital punishment. A least squares regression line was calculated to predict the percent that favored
Someone is interested in studying property tax rates in the United States. He randomly selects 25 homes and looks up their property tax rate. He is interested in studying the center, shape and sprea
A study of cats and dogs found that 25 of 45 cats and 44 of 60 dogs slept more than 10 hours per day. At the .05 level of significance, is there sufficient evidence to conclude that a difference exi