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The average verbal sat score of all students is 540 and the population standard deviation is 30 sat points. what is the probability that a random sample of 36 students will have a mean verbal sat score that is great than 535?
When calculating correlation coefficient, what does a value of -2 indicate? Strong negative correlation, Weak negative correlation.
One sample has a variance of s2=6 and a second sample has a variance of s2=8. If the two samples are the same size (n1=n2), then what is the pooled variance for the two samples?
A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
How would you use the "margin of error" in estimating the percentage of all adults who think that Venetian blinds are the hardest to clean?
The director of quality for Harley Davidson is conducting his weekly spot check of the transmission gear box of the newly introduced Wind Phantom series motorcycle.
Assume that a single radar unit used to detect incoming missiles has a probability of 0.90 of correctly detecting an incoming missile attack.
Air-America has a policy of booking as many as 14 people on an airplane that can seat only 12. (Past studies have revealed that only 92% of the booked passengers actually arrive for the flight.)
Build a scatter plot, Find the value of the linear correlation coefficient r, and find the critical value of r using α=0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables.
If you are performing a hypothesis test using a z statistic in which you sampled 50 people and found an average SAT verbal score of 542 (assume we know the population mean to be 500 and the standard deviation to be 100)
Discuss why the standard error for the distribution of sample means is smaller than the standard deviation of sample scores. Distinguish between within-group designs and between-group designs.
A Taguchi experiment is to be performed on the effects of lift, bore, stroke, and compression on engine performance with horsepower as the outcome variable. The factors were tested at each of the following levels in hopes of improving engine horse..
If the oven gets hotter than 475 degrees F, the core is defective. What is the probability that the oven will cause a core to be defective?
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