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Following a significant one-way between-subjects ANOVA in which k > 2, what is the next appropriate step?
Each student in a class of 80 rolls 8 dice in order to perform inference about the mean of all dice rolls (which happens to be 3.5).Suppose each student uses his or her sample to test the true null
A box contains 4 red balls, 3 orange balls, and 2 yellow balls; and each ball has the same size. In how many ways can you remove (without replacement) 2 red, 2 orange, and 2 yellow balls (in any ord
If 30%of the students have never taken a statistics class, 60% have taken only one semester of a statistic class, and the rest have taken only two or more semesters of statistic, what is the probabi
The table below shows five baskets containing different quantities of oranges. (Baskets) Number of oranges (1) 30 (2) 18 (3) 30 (4) 33 (5) 36
The inflection points of a bell curve are at x = 40 and x = 52. What is the area under the bell curve between the inflection points?
Assumed that it is reasonable to believe that the population is approximately normal and the population standard deviation 63. what is the upper bound of the 95% confidence interval for the battery
A researcher uses analysis of variance to test for mean differences among four treatments with a sample of n = 8 in each treatment. The F-ratio for this analysis would have what df values?
Collect a data set with two related variables. You can create your own data set or can download a data set from a web or to use data sets that posted on project organizer. Calculate descriptive stat
Calculate the point estimate of the population proportion of those who believe that low crime is most important. (Round your answer to 2 decimal places.) Point estimate
An accounting professor is notorious for being stingy in giving out good letter grades. In a large section of 140 students in the fall semester, she gave out only 5% As, 23% Bs, 42% Cs, and 30% Ds a
A judge chooses a jury of n people out of a pool of N people. The choice is uniform among all subsets of n elements of the pool. Unhappy with an outcome, he dissolves this jury (returning the people
The ability to taste the compound phenylthiocarbamide (PTC) is a genetically controlled trait in humans. Researchers are planning a study to estimate the proportion of these "tasters." For their pur
The higher the score, the higher the hypnotizability. Assume the data violate the assumptions required for use of the F test, but are at least of ordinal scaling. Using 0.05, what is your conclusion
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The population standard deviation of the
The National Safety Council reported that 52 percent of American turnpike drivers are men. A sample of 300 cars traveling southbound on the New Jersey Turnpike yesterday revealed that 170 were drive
At the .025 level, has Holdlonger increased the shelf life of the chlorine? Estimate the p-value. State the null hypothesis and the alternate hypothesis. State the decision rule for .025 significanc
A trucking firm delivers appliances for a large retail operation. The packages (or crates) have a mean weight of 305 lb. and a variance of 2916. (Give your answers correct to four decimal places.)
A 95% confidence interval for the true proportion of potatoes in the truck that have major defects is
Suppose telephone calls arrive at an emergency hotline at a rate of 5 per hour , and you begin monitoring calls at time t = 0 ( in hours )
An airline company is considering a new policy of booking as many as 281 persons on an airplane that can seat only 270. Past studies have revealed that only 88% of the booked passengers actually arr
Use normal approximation to estimate the probability of getting exactly 47 girls in 100 births. Assume that boys and girls are equally likely.
The Capital Asset Pricing Model is a financial model that assumes returns on a portfolio are normally distributed. Suppose a portfolio has an average annual return of 14.7% (i.e. an average gain of
From their 50 data points (Washington DC not in the study), the researchers calculated a correlation of 0.988. Based on this study, can we say that individuals who spend a lot on groceries also spen
A set of 200 score is normally distributed with a mean of 60 and a standard deviation of 12 . What are the z scores corresponding to the raw scores of 76,38,and 50?