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Suppose for a random sample of 1046 people age 15 or? older, the mean amount of time spent eating or drinking per day is 1.54 hours with a standard deviation of 0.74 hour. How would I determine and interpret a 99?% confidence interval for the mean amount of time Americans age 15 or older spend eating and drinking each day.
when we say a statistical test procedure is not robust that meansa. it requires a sophisticated level of
A chi-square test for goodness of fit is used to examine the distribution of individuals across three categories, and a chi-square test for independence is used to examine the distribution of individuals in a 2´3 matrix of categories. Which test h..
Why do we have exert witnesses? What is his/her role and what separates them from a regular witness?
when a survey calls residential telephone numbers at random only 25 of the calls reach a live person. you watch the
What type of sample (sample method) do we need in order to obtain a representative sample from the larger population?
What statistical test would you use?- What is the null hypothesis? The research hypothesis?- What is the Type I error? The Type II error?
Total housing costs as a percent of monthly income, five years ago and now. The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
A sample of approx 25 students enrolled in the university points out that X (bar) = $315.4 and s = $43.20.
Find the probability that exactly two people will name "talking on cell phones".p(2)
Regarding four scales referring to levels of measurement: Nominal, Ordinal, Interval and Ratio. Please pick one and discuss one level of measurement, and briefly describe how you would use that type of measurement in a study.
an elevator in the apm building can carry about 20 people with a total weight of 3000 lbs. suppose that the average
a banks loan officer rates applicants for credit. the ratings are normally distributed with a mean of 200 and a
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