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Fit the linear regression model by using SPSS for bp against sodium. Do you think this is a model with the good fit? Why. Is sodium a significant predictor for blood pressure (bp)? Why?
The life span of battery is normally distributed, with mean of 2400 hours and standard deviation of 40 hours. What percent of batteries have the life span that is more than 2470 hours?
Let us further assume that there was good interrater reliability on these frequency counts of behaviors and that they're interval or ratio level of measure, normally distributed, and independent obs
The director of marketing resources from the RLS inc company which deals with production of high speed and very high capacity circuit cards employed exclusively for high end computers gathered the f
The football coach randomly chosen ten players and timed how long each player took to carry out the certain drill. The times (in minutes) were:
A researcher has conducted the 99% confidence interval that is 10 points wide, based upon the sample of 36 scores.
Sex differences in "openness to experience" were studied by administering the quantitative test of this characteristic to 7 men and 5 women (higher the score, less open to experience).
A developmental psychologist is determining problem solving capability in children. Random samples of 7, 9, and 11 year olds children are obtained with the n=8 in each sample and each child is given
Assume that 300 students who're fans of TV show "The Office" are sampled and 231 of them had GPAs higher than 2.5. Then 400 students who dislike that TV show are sampled and 272 of them have GPAs hi
On the standardized test of mathematical ability, Jorge scored 45 and Lisa scored a 39. The distribution of test scores for population is normal, with mean of 30 and standard deviation of 5.
75 Democrats and 60 Republicans were surveyed on their support of the gun control legislation using the standardized measure (high scores representing greater support of gun control).
The manager at lightbulb factory wants to find out whether there is any difference in mean life expectancy of bulbs manufactured on two different kinds of machines. The population standard deviation
The manager of 2 resort properties was interested in any significant difference in willingness of guests to return to the 2 properties.
Find out the critical value for the one-tailed hypothesis test in which a null hypothesis is tested at 5% level of significance based upon a sample size of 25?
A statistics department is holding alumni by telephone asking for donation to aid fund new computer laboratory. Past history describes that 40% of the alumni contacted in this manner will make the
A fraction nonconforming control chart with the centerline 0.10, UCL=0.19, and LCL=0.01 is employed to control the process.
A researcher, under the guise of participant, joined two "singles dating sites" to test advertised superiority of one over the other.
Describe the difference between sample and sampling distribution. Your response must be in complete sentences and you might use sketches to aid you.
You're interested in average number of months MSU graduates spend looking for jobs regarding graduation as compared to RU students.
As an MSU student, you would like to know average grade point average (GPA) for all students enrolled in the MSU in spring semester of 2007.
Compute the appropriate Test Statistic to test the hypothesis that the proportion of condominiums that sold in 30 days reduced from 2006 to 2007.
Is your sample of MSU students significantly different from population of MSU students in terms of number of classes they take per semester (employ alpha level .05)? To answer this question, f
An engineering firm bids on contracts for the short-term jobs where each job can generate the profit of $100,000 for the firm. Assume the probabilities of getting zero to five such jobs in the certa
Find out the probability that at least 10 households own DVD players. Do not use any Normal approximations.
Find out the following areas under standard Normal distribution curve: