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A random sample of 17 wolf litters in Ontario, Canada, gave an average of x1=4.9 wolf pups per litter with estimated sample standard deviations1=1.0. Another random sample of 6 wolf litters in Finland gave an average of x2=2.8 wolf pups per litter with sample standard deviation s2 =1.2(a) Find an 85% confidence interval for m1-m2, the difference in population mean litter size between Ontario and Finland.(b) Examine the confidence interval and explain what it means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At the 85% level of confidence, does it appear that the average litter size of wolf pups in Ontario is greater than the average litter size in Finland?(c) Test the claim that the average litter size of wolf pups in Ontario is greater than the average litter size of wolf pups in Finland. Use a = 0.01.
During the first part of a trip, a canoeist travels 97 miles at a certain speed. The canoeist travels 3 miles on the second part of the trip at a speed 5mph slower. The total time for the trip is 2 hrs. What was the speed on each part of the trip?
Suppose that 166 ft of fencing are used to enclose a corral in the shape of a rectangle with a semicircle whose diameter is a side of the rectangle. What is the diameter of the semicircle and the side of the rectangle?
Find the slope-intercept form of a line that is the perpendicular bisector of a line segment connecting (-7,3) and (1,17)
What are the break even values? In other words, how many boxes of golf balls must they sell to break even?
a statistics teacher plans classes so carefully that the lengths of her classes are uniformly distributed between 45.0 and 55.0 minutes. Find the probability that a given class period runs less than 50.75 minutes.
Also, the number of radio ads must be at least as great as the number of television ads. How many ads of each type should be used? How many people will this reach?
A 25-by-33-inch sheet of paper is to be used for a poster, with the shorter side at the bottom. The margins at the sides and top are to have the same width, and the bottom margin is to be twice as wide as the other margins. Find the width of the m..
A segment has endpoints with coordinates (2,-7) and (5,1). Find the length and midpoint of the segment.
The strength of a rectangular beam is proportional to the product of its width and the square of its depth. Find the dimensions of the strongest beam that can be cut from a circular cylindrical log of radius r.
The two formulas f(t)=Pa^t and f(t)=Pe^rt provide two models for the same exponential growth or decay function. How are the exact values of a and r related? (Find a formula for a as a function or r.
A norman window has the shape of a rectangle surmounted by a semicircle as shown in figure to the left. A Norman window with perimeter 30 ft is to be constructed.
Find the p value and at 0.07 level of significance, test above hypothesis.
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