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For each of the following, indicate whether the variable is ordinal or not. If the variable is not ordinal, indicate its variable type.
a. Opinion about a new tax law (favor or oppose).
b. Letter grade in a statistics course (A, B, and so on).
c. Heights of men (in inches).
Create a stem-and-leaf display of these data.- Write a brief description of the distribution. Be sure to discuss the overall shape as well as any unusual features.
Now we would like to evaluate regression equation for X using Y as independent variable.
When groups are more alike than different, ANOVA assesses the significance of the difference between two groups. When groups are unalike, will findings be more significant?
Perform exploratory data analysis on all variables in the data set. Realizing that you have six groups, be sure that your exploratory analysis is broken down by group. When possible, include appropriate graphs to help illustrate the dataset.
suppose that a particular candidate for public office is in fact favored by 48 of all registered voters in the
a national survey of 40000 adults in the us in 1992 found that 26 of adults were current smokers. a similar survey of
abc company just completed a business strategy for the next 5 years that is planned to result in increasing sales
a draw a scatter plot of arm span x versus height y and the regression line.b obtain the correlation coefficient r the
The sample mean is 60 kilograms (kg). Suppose that the mean weights of male runners follow a normal distribution with unknown mean mu and standard deviation of 5 kg (sigma). What is the 95% confidence interval for mu?
Find out the probability distribution of blood types by gender in the group of 1000 individuals.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
during a recent year the average cost of making a movie was 54.8 million. this year a random sample of 15 recent action
suppose that the random variable x is the time taken by a garage to service a car. these times are distributed between
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