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Detecting insects in farm fields. To detect the presence of harmful insects in farm fields, we can put up boards covered with a sticky material and examine the insects trapped on the boards. Which colors attract insects best? Experimenters placed six boards of each of four colors at random locations in a field of oats and measured the number of cereal leaf beetles trapped. Here are the data:
Because the samples are small, we will apply a nonparametric test.
(a) What hypotheses does ANOVA test? What hypotheses does Kruskal-Wallis test?
(b) Find the median number of beetles trapped by boards of each color. Which colors appear more effective? Use the Kruskal-Wallis test to see if there are significant differences among the colors. What do you conclude?
Assume you have the following data: Ho: u = 2,450, S = 400, n = 100, and X = 2,300. Conduct a hypothesis test at the .01 significance level.
according to most estimates 10 of the people in the general population are left-handed and 90 are right-handed. a
use the normal approximation to the binomial to determine what is the probability that: 100 or more murder are committed with a firearm? a. 0.452 b. 0.548 c. 0.367 d. 0.164.
You are a restaurant manager. You must pick 13 entrees for your menu. There are 11 meat offerings and 7 poultry offerings to choose from. (a) In how many ways can 13 entrees be randomly selected out of the 18 meat and poultry offerings? Show..
The height and diameter of 31 trees of a certain species were measured, the trees were cut down, and the volume of usable lumber was determined. Find the explanatory variable(s) in this study are
Translate the following statements into symbolic form using capital letters to represent affirmative English statements.- The Packers' winning most of their games implies that Aaron Rodgers is a great quarterback.
an inspector obtains four samples with three observations in each. the actual measurements in centimeters are shown
1. suppose an experiment has five equally likely outcomes e1 e2 e3 e4 e5. assign probabilities to each outcome and
Under what conditions is the median a more meaningful measure of central tendency than the mean?- Why do researchers prefer the standard deviation as a measure of variability over the range?
find the z value to the right of the mean so that 62.93 of the area under the distribution curve lies to the left of
question describing data frequency distribution and graphic presentationsyou are the parts manager for a local dumb
Produce a random sample by taking all columns of randu, and reproduce Figure.- Show that the triplets randu[i,] lie on one of 15 parallel hyperplanes.
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