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A horticulturalist has been using brand A fertilizer on a certain variety of plant. A new brand B fertilizer has just been marketed, which purports to be superior to brand A. Two independent groups of n1 = n2 = 8 new plantings are to be treated (one with the brand A fertilizer and the other with the brand B fertilizer) and the times (in days) taken to achieve a certain height are recorded:
Brand A: 30 35 30 31 39 39 35 29Brand B: 30 33 29 33 35 28 30 29
Find a 99% confidence interval for the true mean difference in growth time (given that these times are approximately normally distributed and the variances are approximately equal).
Standard deviation of 5. suppose 100 golfers played the course today. Find the probability that the average score of the 100 golfers exceeded 74.
the claim is that the proportion of peas with yellow pods is equal to 0.25 or 25. the sample statistics from one
1. for a sample of 36 houses what would you expect the distribution of the sale prices to be? a real-estate agent has
The book has a program on page 153 for this, but the program was written is an unusual way. The subject should be mouse. So how should we dene mouse in the data?
In this assignment, you develop two purpose statements using the same data set (different purposes, same data) and will use regression and two sample hypothesis testing to analyze the same set of data. For example, you may want to determine if there ..
Company wishes to know how many pounds of each chemical ingredient to put into the bag of fertilizer to meet minimum needs of 20 ounces of nitrogen, 36 ounces of phosphate, and 2 ounces of potassium during minimizing cost.
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
The DBA asks for your help in planning the data archive for the following Premiere Products database:
a product is made up of two subsystems in series. the first subsystem consists of 15 components in series. the second
a new muscle relaxant is available. researchers from the firm developing the relaxant have done studies that indicate
an exit poll of 1000 randomly selected voters found that 515 favored candidate a. is the race too close to call? answer
consider these ratio scores from an experimentnbspnbspcondition 1nbspnbspnbspnbspcondition 2nbspnbspnbspnbspcondition
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