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Addition and Complementary law of probability.
Show some work for each part. A diagram can be helpful. A survey of adults found the following: 65 percent of the adults drink coffee. 35 percent drink tea. 80 percent drink coffee or tea (or both). If we choose a surveyed adult at random, find the probability that the adult?
Use this information to construct a probability table, and then calculate each of the following probabilities:
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
Heights of 18-year-old men are approximately normally distributed, with mean 68 inches and standard deviation 3 inches.
Using the following data on 15 workers, construct an exact 95% confidence interval for µ.
Plot a scatter diagram of the results with Depth of Water as the independent variable.
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
Solve the mean and standard deviation equations
If a complete failure occurs, calculate the probability that the fault occurred in:
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Which of the following would produce a new confidence interval with smaller width based on these same data and produce a new confidence interval
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
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