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The purpose of the study was to compare the mean salivary flow rate among subjects with cerebral palsy and among
The purpose of the study was to compare the mean salivary flow rate among subjects with cerebral palsy and among subjects in a control group. Each group had 10 subjects.
The following table gives the mean flow rate in ml/minute as Well as the standard error of the estimate of the mean. Here are some descriptive statistics of the salivary flow rate for each group.
(a) Below we have comparative boxplots and overlayed normal probability plots for the salivary flow rate. Is it reasonable to assume that the populations are normal?
Is it reasonable to assume that the population variances are equal? (Discuss)
(b) Do we have significant evidence at a = 5% that the mean salivary flow rate are different between these groups?
(c) Give a 95% confidence interval for the difference in mean salivary flow between these two group.
Construct a 90 percent confidence interval for the true mean weight. Describe factors which might cause variation in the weight of Tootsie Rolls during manufacture.
The New York City Housing and Vacancy Survey showed a total of 59,324 rent-controlled housing units and 236,263 rent-stabilized units built in 194 or later.
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Document the 2NF and the 3NF stages by explaining how each table, and each field in that table complies with the appropriate normalization rule. Use your own words, incorporating normalization and functional dependency terminology.
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a biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the
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determine whether the distribution is a discrete probability distributionxnbspnbsp
A 2005 survey of Internet users reported that 22% downloaded music onto their computers. The ?ling of lawsuits by the recording industry may be a reason why this percent has decreased from the estimate of 29% from a survey taken two years before.
a box contains 24 yellow 32 green and 36 red jelly beans. if 15 jelly beans are selected at random what is the
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