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The data to the right represents the number of days of the growing season over the last 10 years in a certain area It is known that the data are normally distributed and s=23.89 days. Using these values as a simple random sample, construct an 80% confidence interval for the population standard deviation of the number of days in the growing season. 164, 188,206, 212, 168, 145, 208, 192, 212,210
the quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes
Is there evidence of a significant difference between males and females in the proportion who enjoy shopping for clothing at the 0.01 level of significance?
In solution during a filtering process is given by the equation P(x)=800(2)^-0.4n, where n is the number of filtering steps. Find the amounts left for n= 0 and n = 5. Round to the nearest whole number.
the machining center at a production facility has three lathes of differing ages and thus precision. the oldest machine
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
a sample of 16 items provides a sample standard deviation of 9.5. test the following hypotheses using a .05.? 0 s 2
Seven employees were included from Area A, 9 from Area B and 12 from Area C. The test statistic was computed to be 4.91. What can we conclude at the 0.05 level?
q1. the discussion surrounding the anova is very important. this is a widely utilized statistical tool. what is the
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
Ethics The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase?
For each of the following sampling scenarios, determine which test statistic is appropriate to use when making inference statements about the population mean.
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students
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