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A role as a statistical consultant. You are the statistical expert for a graduate student planning her PhD research. After you carefully present the mechanics of significance testing, she suggests using α = 0.20 for the study because she would be more likely to obtain statistically significant results and she really needs significant results to graduate.
Explain in simple terms why this would not be a good use of statistical methods.
a chi-square test for independence is used to evaluate the relationship between two variables. if both variables are
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?
a researcher knows that the population mean among college students taking social conformity test is neutral100. scores
A medical researcher estimates that no more than 55% of U.S. adults eat breakfast every day. In a random sample of 250 U.S. adults, 56.4% say they eat breakfast every day.
An independent testing laboratory found that a random sample of 44 of these phones worked over an average distance of 142 feet, with a standard deviation of 12 feet. Is there evidence that the manufacturer s claim is false?
the student newspaper called campus press polled a simple random sample of 280 undergraduate students in order to study
GB Flash Memory Card After scanning the UPC code of a 4 GB flash memory card using his smartphone, Michael Sullivan received the following prices for the goods at a variety of online retailers. What happens to the interval as the level of confidenc..
An article in BusinessWeek discusses the salvage value of bankrupt hedge funds compared with the salvage value of bankrupt consumer lenders.7 Suppose the following data are the value a shareholder can salvage, in cents per invested dollar, for ran..
State the decision rule, compute the pooled estimate of the population variance, compute the test statistic, and state your decision about the null hypothesis and estimate the p-value.
A ski gondola carries skiers to the top of a mountain. It bears a plaque stating that the maximum capacity is 14 people or 2324 lb. That capacity will be exceeded if 14 people have weights with a mean greater than 2324 lb/14 = 166 lb. Assume that..
Find out the estimate of the population mean.The mean daily sales at the Stop and Go are $20,000 for a sample of 40 days. The standard deviation of the sample is $3,000.
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