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A population mean on a math section of the SAT is 500 and the sd=100. 400 students are taking the SAT and their families income was 70,000 and 80,000 had a math SAT score of 511. I'm trying to find the point estimate for this group in addition to the 99% confidence interval.
consider x1 and x2 given in exercise 3-173 where if x1 and x2 are independent random variables with ex12ex25 vx12 vx210
The mill has the ability to run the same grade on multiple paper machines. Compare the relationship between the two instruments for the following (consider both average and variability):
The filter has a cutoff value for the point total; any message rated lower than that cutoff passes through to your inbox, and the rest, suspected to be spam.
After training, each employee completed a search report on 40 products. Analyze the data, which are in minutes, and write a conclusion about the new software package.
The problem now is to decide which contractor to choose. B has indicated that for an- other $20 million he could do the job in 18 months, and you have said that you would be indifferent between that and the original proposal.
A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose
Construct a 99% confidence interval for the standard deviation, σ, of the replacement times of all washing machines of this type.
A population has a mean of 53 and a standard deviation of 21. A sample of 49 observations will be taken what is the probability that the sample mean will be greater than 57.95?
Draw the Activity on Node (AON) network. Determine the total project completion time and activities along the critical path for the project
Based on this information and a hypothesis test of your choice, do the suspicions regarding Mr. Jones appear to be justified?
1. What is the possible range of scores for the data set? 2. Using the data set, open a data file in SPSS and enter the data in data and variable view. Participant #1 must have missing data for Variable #3. Code this.
suppose that you want to test for a difference in proportion between two groups. group 1 has 80 respondents and 40 of
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