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An exhaustive survey of all users In a wilderness park taken in 1980 revealed that the average number of persons per party was 2.6. In a random sample of 25 parties taken in 2005, the average was 3.2 persons, with a standard deviation of 1.08. Test the hypothesis that the number of persons per party has changed in the intervening years.
Construct a 95% confidence interval for the proportion and calculate the P value for the given test.
What is the critical F value for a sample of four observations in the numerator and seven in the denominator? Use a one-tailed test and the .01 significance level.
For a population containing N=902 individuals, what code number would you assign for:
derive expression for a and b in terms of standard deviation of x and y mean of x and y and the correlation bw x and y.
Compute the probability of seven consecutive points falling above the centerline given a stable process. Is this probability associated with type I or type II error?
These data represent the ages of drivers and the number of accidents reported for each age group in Pennsylvania for a selected year. Find the equation of the regression line for the given data.
The experiment indicates a sample average diameter x BAR = 5.027 millimeters. Does this sample information appear to support or refute the engineer's conjecture?
A sample of 16 consumers is taken. The average age in the sample was 22.5 years with a standard deviation of 5 years. Construct a 95% confidence level.
Recognize independent variable and dependent variable for this experiment. Think in your head what influences what? Or, what causes what? Cause is independent variable.
in an experiment die is rolled continually until a 6 appears at which point the experiment stops. what points of the
The critical value of F at 95% confidence when there is a sample size of 21 for the sample with the smaller variance, and there is a sample size of 9 for the sample with the larger sample variance is:
Is the proportion of men who felt that division of housework was fair greater than the proportion of women who felt the division of housework was fair? Use alpha = .05 for the test.
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