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On page 336 of the text we are given a formula to calculate the minimum necessary sample size n. When we do not know the estimates p hat and q hat, we are told to use a value of 0.5 for each of them. Why?
When modelling E(y) with single qualitative independent variable, number of 0 - 1 dummy variables in model is equal to number of levels of qualitative variable.
Two different simple random samples are drawn from two different populations. The first sample consists of 20 people, with 10 having a common attribute.
Crete a 90% confidence interval for mean Secchi dish measurement.
Decide whether experiment is binomial, Poisson or neither based on info given. Each week man plays game in which he has a 21% chance of winning.
This shuttle component functions successfully provided that at least one of the n systems functions properly. Find the probability that this shuttle component functions successfully if n - 2.
Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? Let p1 refer to the urban population.
The distribution is normal. The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
A population of scores forms a normal distribution with a mean of μ = 40 and a standard deviation of σ =12.
Based on long term experience, the standard deviation can be taken to be $2.92. Find a 90% confidence interval for the average amount left by all groups.
Can you describe in detail the differences in ANOVA and the five-step hypothesis testing method?
A competitive school requires an applicant to have an IQ score in the top 10% of adults. What is the cutoff score?
Discuss how a t test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students.
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