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A statistician working for the Department of the Interior is constructing a systematic random sample of trees in a forest preserve. All trees have been identified and numbered with a non-invasive number attached to the bark. The statistician wishes to estimate the mean height of the trees in the forest preserve, and has calculated an appropriate sample size of n=43 trees. The 587th of the 731 trees in the preserve was selected as the first observation in the sample. What is the tree number of the second observation in the sample?
A. 588B. 544C. 604D. 630
Find the midrange for the following group of data items: what is the midrange rounded to the nearest tenth?
After a certain candidate announced his intention for running for the premiership of a province, many polls were conducted to assess his chanced for success.
Test the hypothesis, at the 0.05 level of significance, that the size of a family is independent of the level of education attained by the father.
However one of the children fails to solve the peoblems, so the researcher has an undetermined score. what is the best measure of central tendency for these data?
College students are a major target for advertisements for credit cards. At a university, 65% of students surveyed said they had opened a new credit card account within the past year.
The quality control department of Widgets Manufacturing needs your help. They can't decide which significance level is appropriate for testing the claim that fewer than 50% of widgets from a production run are defective.
Which confidence interval has the most variability?
Describe five data collection techniques in your own words. Be sure to cite any sources you used. Explain why the examination of collected data is so important.
A contractor is considering a sale that promises a profit of $31,000 with a probability of 0.7 or a loss (due to bad weather, strikes, and such) of $13,000 with a probability of 0.3. What is the expected profit?
Recently, students in a marketing research class were interested in the driving behavior of students. Specifically, the marketing students were interested if exceeding the speed limit was related to gender.
You will investigate four different scenarios of population growth also decline in this town. Graph the model as well as investigate it by four different growth models.
I have 400 feet of lumber to frame a rectangular patio. I want to maximize the area of the patio. What should the dimensions of th patio be.
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