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Question: PestFree Chemicals has developed a new fungus preventative that may have a significant market among potato growers. Unfortunately, the actual extent of the fungus problem in any year depends on rainfall, temperature, and many other factors. To test the new chemical, Pest Free has used it on 500 acres of potatoes and has used the leading competitor on an additional 500 acres. At the end of the season, 120 acres treated by the new chemical show significant levels of fungus infestation, whereas 160 of the acres treated by the leading chemical show significant infestation. Do these data provide statistical proof that the new product is superior to the leading competitor?
A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
a) T- shirts at a store: price each, number sold. b) Real estate: house price, house size (square footage). c) Economics: Interest rates, number of mortgage applications. d) Employees: Salary, years of experience.
What was the total sample size used?- Is the overall ANOVA statistically significant?- Interpret the results of the further analysis. Explain.
on saturdays cars arrive at sami schmitts scrub and shine car wash at the rate of 6 cars per fifteen-minute interval.
using the following data to establish a 95 lower prediction bound for a sample mean to be taken based on three
a family managed to decrease their energy consumption from 145 kilowatt-hours to 136 kilowatts-hours. what percent of
Then comment on the effectiveness of the presentation: Were the frequency distributions used effectively to report the results? Why or why not?
1. A statement of purpose for the firm's compensation plan specific to the department described, including rank of employees addressed. 2. A detailed explanation of employment eligibility for employment, rank, overtime and incentives.
Construct and interpret a 90 percent confidence interval for the mean of the population of half-liter diet cola bottles.
Company wishes to exceed on-time rate of competitors at new hub. Hundreds of flights arrive at location daily. Determine the main advantages and disadvantages of employing sampling in application?
From the test data, can we determine whether the oven has an effect on the cake's density? The null hypothesis should be: Oven has no effect on density.
Draw a cumulative frequency distribution. - Forty percent of the buses were driven fewer than how many miles? -How many buses were driven less than 850 miles?
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