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Let the ordered sample observations be denoted by being the smallest and yn the largest). Our suggested check for normality is to plot the pairs. Suppose we believe that the observations come from a distribution with mean 0, and let w1,..., wn be the ordered absolute values of the xi 9s. A halfnormal plot is a probability plot of the wi 9s. More specifically, since half-normal plot is a plot of the airs. The virtue of this plot is that small or large outliers in the original sample will now appear only at the upper end of the plot rather than at both ends. Construct a half-normal plot for the following sample of measurement errors, and comment
Measurements follow of the amount of HIV-1 RNA levels in the group whose partners who were initially uninfected became HIV positive during the course of the study: values are given in units of RNA copies/mL. Determine the mean, median, and standard..
a sociologist wants to determine the current percentage of households using e-mail. how many households surveyed in
the 70-year long-term record for weather shows that for new york state the annual precipitation has a mean of 39.81
Roll a pair of dice, what is the probability of rolling an even total or a total greater than 9?
If sales is the variable you are trying to explain and you have 2 independent variables of color and price. The color coefficient is 100, and the price coefficient is -200. You have an intercept coefficient of 999 and an r-squared value of .2706. ..
question during may a certain drawbrige over the intercoastal waterway is raised every half hour to allow boats to
the number of traffic accidents at a certain intersec- tion is thought to be well modeled by a poisson process with a
A sample of 30 students are tested (sample mean=58, standard error=3.2). Compute a 99 percent confidence interval based on this sample's data. How do these students compare to the national sample?
At a recent meeting of educational researchers comparison were made between the type of college freshmen attend and the numbers who drop out. Use a significance level of .05 and determine if the type of school and the drop out rate are independent.
When studying the simultaneous responses to two categorical questions, we should set up a:
Normal approximation to the Binomial distribution - Evaluate the probability that at least 195 of the students are female.
a. Are there any constraints on the choice of a for f(x) to be a probability density function? If so, precisely what are they? b. Is the random variable X a discrete or a continuous random variable? Why?
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