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Fear of darkness is a common emotion. The following data were obtained by asking 200 individuals in each age group whether they had serious fears of darkness. At α = 0.01, do we have sufficient evidence to reject the hypothesis that "The same proportion of each age group has serious fears of darkness"?
Age Group
Elementary
Jr. High
Sr. High
College
Adult
No. Who Fear Darkness
83
72
49
36
114
a. The above table is an incomplete contingency table even though at first glance it might appear to be multinomial. Explain why. (Hint: The contingency table must account for all 1000 people.)
b. Solve using the p-value approach.
c. Solve using the classical approach.
Calculate the mean salary of the CFOs and based on measures of the center of the data; determine if the CFO salary data are skewed.
Suppose that a deformation of the unit cube Ω = (0, 1)3 is given by x(X, t) = ((1 + t)X1 +(t2 - t3)X2 +2 tX3, (1 - t)X2, (t - t2)X2 + X3)T. Find the deformation gradient F and its determinant J
Pick any one method that can be used here, just name the method you used and explain how you will find the polynomial that will represent the length of the deck? Hint: Area of deck = length * width.
Kent worked in the housewares section of a department store. This year he set a record high for vacuum sales with 567 vacuums sold. The previous high was last year, when 540 vacuums were sold. What is the percent of increase in sales from last yea..
Discuss any specific statistical results that would help the Beltway Shoes Marketing Department understand the regional shoe market.
Use partial decomposition to integrate. (2x^2-x-20)/(x^2+x-6 ). (sint)(4cos^2t-1)/(cost)(1+2cos^2t+cos^4t)
The police department of a major city has found that the average height of their 1,200 officers is 71 inches (µ = 71 in.) with σ = 2.6 inches. What is the z score for an officer who is 72 inches tall? Based on the z score and the z table, what is th..
Find the curvature and radius of curvature of the plane curve at the given value of x. (Give your answers correct to 3 significant figures.) y = 5x + 2/x, x = 3.
The consequences of not believing the biblical concept that you have chosen.
Does every graph have a spanning tree? If not, then can you tell from the number of nodes and the number of edges a graph has whether it has a spanning tree, or do you need more information?
The hypotenuse of a right triangle is 13cm. One arm of the right angle is bigger by 7cm than the other leg. Find the length of the arms of the right angle.
Draw the state transition diagram for this chain. If we know P(X1 =1)= P(X1= 2)=1/ 4. find P(X1= 3) and Is this chain irreducible?
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