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Using the same research question and data from the Learning Team Meeting Two assignment, conduct the equivalent, nonparametric test of hypothesis using the 5-step process.
An election poll reported that candidate had approval rating 31% with margin of error E of 4%. Construct a confidence interval for proportion of adults who approved of the candidate.
What is the critical value at the 0.05 level of significance for a goodness-of-fit test if there are six categories.
A company auditor was interested in estimating the total number of travel vouchers that were incorrectly filed. In a SRS of size n =50 oft of the group of N = 250, were filed incorrectly.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life
Data from the MTF 2006 survey reveal that 71.5 percent (432 out of 604) of males and 74 percent (562 out of 756) of females reported trying alcohol.
Six infants were involved in a study to evaluate the effectiveness of two medications for the treatment of diaper rash. For each baby two areas of approximately the same size and rash severity
Since a small surcharge would be added to the phone bills to pay for the extra installation costs the company has decided to survey customers and proceed only if the survey strongly indicates that m
A certain brand of eggs claims that the eggs have reduced cholesterol content, with an average of only 2.5 percent cholesterol. A concerned health group wants to test whether the claim is true
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernel
Find out the minimum sample size required using prior study which found that 34% of the respondents said they support abolishing penny?
A sample of 20 pages was taken without replacement from the 1,591 page phone directory Ameritech Pages plus Yellow Pages. On each page, the mean area devoted to display ads was measured (a display a
At the Olympic level of competition, even the smallest factors can make the difference between winning and losing. For instance, Pelton (1983) has shown that Olympic marksmen shoot much well if they
Referring back to item 3, assume the critical value for this test is 6.73, and you obtain a computed statistical value of 11.27. Is there evidence to accept the null hypothesis.
The operations manager of musical instrument distributor feels that deman for bass drums might be related to the number of television appearances by popular rock group green shades throughout the pr
There is some evidence that men have an enzyme that begins to metabolize alcohol in the stomach. Women have lower levels of the enzyme, which means that alcohol passes directly through the stomach a
The following data are from a research study comparing two treatment conditions. Do the data indicate a significant difference between treatments? Utilize a two-tailed test with ∝ = .05.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why.
The stimulant Ritalin has been shown to increase attention span and progress academic performance in children with ADHD (Evans, Pelham, Smith, et al., 2001).
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
A study shows that children who attended a high-quality daycare program before they enter school perform better on math tests than children who do not have daycare experience. The data showed that a
People's handshakes seem to be related to other aspects of their personalities (Chaplin, Phillips, Brown, Clanton, & Stein, 2000). For example, a firm handshake is negatively related to shyness.
Most adolescents experience a growth spurt when they are between 12 and 15 years old. This period of dramatic growth generally occurs around age 12 for girls and around age 14 for boys.
A researcher would like to find out how physical endurance is affected by a common herbal supplement. The researcher measures endurance for a sample of n = 9 participants.
In selecting simple random sample of size n from a normal population, the sampling distribution of the sample mean appropriated by a normal distribution as the sample size becomes large.