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Exercise and heart rate. A student project measured the increase in the heart rates of fellow students when they stepped up and down for three minutes to the beat of a metronome. The explanatory variables are step height (Lo= 5.75 inches, Hi =11.5 inches) and metronome beat (Slow= 14 steps/minute, Med =21 steps/minute, Fast= 28 steps/minute). The subject's heart rate was measured for 20 seconds before and after stepping. The response variable is the increase in heart rate during exercise.12 The data file has resting and final heart rates as well as the increase in heart rate for this study. If the randomization worked well, there should be no significant differences among the 6 groups in mean resting heart rate (variable HRrest in the data file).
(a) How many pairwise comparisons are there among the means of 6 populations?
(b) Use Tukey's method to compare these means at the overall 10% significance level.
He argues that the regression effort says people who perform very poorly in their previous job tend to perform well in their next job. Is this what the regression effect says? Explain.
What type of survey method the researcher could use and why and what sampling method could the researcher use to select his/her sample and why
Analyze (T Test), Analyze (Chi Square), Improve (DOE), Improve (Scatter Diagram), Scatter, Control (XmR Chart), and Control (Pp Ppk) from the manufacturing project?
at a certain university the average attendance at basketball games has been 2825. this year the attendance for the
Overall, the amount of work-hours involved in the festival preperation is normally distributed around 100 hours withn a standard deviation of 12 hours.
Suppose Napoleon were using Bayes' theorm to revise his information. To do so, he would have had to make some judgements about P(Prussian and English Join forces |Napoleon Wins) and P(Prussian and English Join forces |Napoleon loses).
We can assign probabilities to values of using the normal density curve with mean 0.30 and standard deviation 0.023. Use this density curve to find the probabilities of the following events.
What is the probability that the auto dealer will need to order more transmissions? You should take your calculations to 4 decimal places.
Probability of a flush. Poker player holds flush when all 5 cards in hand belong to same suit (clubs, diamonds, hearts, or spades).
By using this data and incorporating seasonal effects, predict quarterly turnover for 2010.
the quality control manager at a light globe factory needs to estimate the mean life of a large shipment of
an applicant must score at least 80 points on a particular psychological test to be eligible for the peace corps. from
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