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The One-Way ANOVA applet lets you see how the F statistic and the P-value depend on the variability of the data within groups and the differences among the means.
(a) The black dots are at the means of the three groups. Move these up and down until you get a con?guration that gives a P-value of about 0.01. What is the value of the F statistic?
(b) Now increase the variation within the groups by dragging the mark on the pooled standard error scale to the right. Describe what happens to the F statistic and the P-value. Explain why this happens.
consider the minitab output shown below.two sample t-test and cisamplenmeanstdevse
To carry out a validation study, an I/O psychologist is developing a regression equation from data collected from those hired two years ago
The probability that the speed will be more than 70 words per minute is 0.15. Find the mean and the standard deviation of typing speed.
Find the center of mass of the region bounded by the parabola y = 8 -2x^2 and the x-axis
Validity is more critical to measurement than reliability. A valid measurement is reliable, but a reliable measurement may not be valid.
an important feature of golf cart batteries is the number of minutes they will perform before needing to be recharged.
the mean monthly rent for a sample of studio apartments in one city is 1260 with a standard deviation of 230. the
You need to hand in individual work. You may talk with each other about the problems. However, everything in the assignment must be your own work.
(a) Find an expression which serves as a linear approximation for l at h=1000 m. (b) Give two assumptions you think have been made in deriving the expression above.
How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
Choose a product you are familiar with as a consumer. Answer the following. What type of demand patterns would that product have - cyclical, secular, seasonal, etc. or a combination of several types? Explain.
two independent observations are selected randomly from a standard normal distribution. the probability that their
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