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William Gosset (a.k.a. Student) did an experiment in which regular and kiln dried seeds were planted in adjacent plots in 11 fields. The yield (lbs/acre) for each plot was recorded at harvest. The data are available in the gosset data set.
a) Why was it important to plant seeds in adjacent plots in a variety of fields?
b) Do the data suggest that one method of preparing the seeds is better than the other?
Make a decision using the Decision Rule approach at given α = 0.05.
Our decisions depend on how the options are presented to us. Here's an experiment that illustrates this phenomenon. Tell 20 subjects that they have been given $50 but can't keep it all.
The following regression equation and correlation coefficient were calculated using minitab for the bivariate data age of men and their weight.
ind a value h such that 99% of all dining-room chairs have height less than h - Find the first and third quartiles of the dining-room chair height distribution
The results were analyzed using a mixed design and blocking, and the reported results were as follows.- Interpret these findings.
Compute a 95% confidence interval for each of the questions, and write a short report about what student loan borrowers think about their debt.
What is the difference between the null and alternative hypothesis statements in one tailed and two tailed tests? How can manufacturing companies use the standard normal distribution to determine quality control of their products?
I have been approached by a pharmaceutical company that has developed a new drug, which is supposed to be effective in the treatment of schizophrenia.
Estimating BMI The body mass index (BMI) of all American young women is believed to follow a Normal distribution with a standard deviation of about 7.5.
A mean time of 90 minutes and standard deviation of 18 minutes. What proportion of new typists need between 1 and 2 hours to learn the computer system?
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds and standard deviation of 0.8 pound. What percentage of samples of 4 fish will have sample means between 3..
To examine the effectiveness of its four annual advertising promotions, a mail order company has sent a questionnaire to each of its customers, asking how many of the previous year's promotions prompted orders that would not have otherwise been made.
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