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Two different teaching procedures were used on two different groups of students. Each group contained 100 students of about the same ability. At the end of the term, an evaluating team assigned a letter grade to each student. The results were tabulated as follows.
Grade
Group
A
B
c
D
F
Total
I
15
25
32
17
11
100
II
9
18
29
28
16
If we consider these data to be independent observations from two respective multinomial distributions with k = 5, test, at the 5 percent significance level, the hypothesis that the two distributions are the same (and hence the two teaching procedures are equally effective).
How to find the weight with a height that does not fall on the SD line - Suppose the following girls fell exactly on the SD line. The table below gives their heights, you fill in their weights. (Don't type in "lbs.")
Plot a CDF based on these data. What kind of theoretical distribution do you think would be appropriate for these data? Why?
Let 3 trails (they may not be independent), each of which is either success or not. Let X denotes number of successes. Assume E[X] = 1.8. Determine the largest possible value of P(X=3)?
A coin is tossed 100 times. The difference "number of heads - number of tails" is like the sum of 100 draws from one of the following boxes. which one, and why?
1. Let P be a law on a separable normed vector space (S, · ), x ∈ S, and Px the translate of P by x , so that Px ( A) := P( A - x ) for all Borel sets A, where A - x := {a - x : a ∈ A}. Show that W ( P, Px ) = x.
Determine the standard deviation of the difference between the diameter of the hole and the diameter of the bolt. (Round your answer to 4 decimal places.)
a null hypothesis is that the mean nose lengths of men and women are the same. the alternative hypothesis is that men
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When the experiment is performed many times, the chain ends in state one approximately 20 percent of the time and in state two approximately 80 percent of the time. Compute a sensible estimate for the unknown parameter p and explain how you found ..
question as a student you probably have noticed a curious phenomenon. in every class there are some students who zip
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
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