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1we are establishing a quality control program for a process and need to establish the mean and standard deviation for the process the first 10
1a restaurant monitors its customers complaints here are the percent of customers with the following complaintswith this information which of the
1when using past data i have found that the proportion of items rejected by quality control personnel is about 3 we normally make 5000 items per day
1a company is studying their processes and for one of them the acidity of the mixture is critical they have obtained the following control
1a company makes molded plastic toys they study the plastic injection process into the molds a common cause of variation isathe exact temperature of
1consider a small experiment to investigate if biofeedback can reduce blood pressure six subjects were randomized to the treatment group n2 and the
1an inventor claims that a device increases gas mileage by 4 a test of the device was done by randomly selecting 10 cars of the same make and model
1the following is the number of chocolate chips found in each of eight cookies7 9 1 6 13 10 3 5we wish to estimate the median and the standard error
1in which of the following situations is bootstrapping and other resampling methods often usedawhen data have been collected using a probability
1an advantage of the permutation test over the t test for a difference in means is thatait gives accurate p-values even when the distributions are
1my bootstrap distribution after 1000 resamples is shown in the histogram and summary statistics belowbased on this information which would be better
1bias of a statistic refers toathe difference between a statistic and the actual parameterbwhether or not questions were worded fairlycthe difference
1the bootstrap method of inference relies onaresampling with replacement from the original samplebresampling from the original sample leaving one
1a pediatrician is interested in studying the effect of motrin on reducing temperature in young children four children with influenza have their
1makers of generic drugs are required to demonstrate that their generic drug does not differ significantly from the reference drug it is intended to
1some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and soil treatment an experiment
1several years ago some colleagues and i did an experiment to see if avons skin-so-soft was as good as off in repelling mosquitoes we recruited 10
1a sample of breakfast cereals yields the following data on the grams of carbohydrates per servingnbspnbspnbsp 19nbsp 23nbsp 26nbsp 21nbsp 25
1one characteristic of billiard balls is their elasticity - the bounce they get when striking one another a manufacturer of billiard balls is testing
real estate agents always say location location location is the most important thing in buying a house we want to know if the sales prices of homes
1real estate agents always say location location location is the most important thing in buying a house we want to know if the sales prices of homes
1nonparametric tests are used whenathe data are normalbthe data are skewedcthe data are counts2the kruskal-wallis rank test is a nonparametric
1a researcher was interested in determining whether incentives and how they were offered affected the response rate in surveys a simple random sample
a researcher was interested in determining whether incentives and how they were offered affected the response rate in surveys a simple random sample