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Employees of a local company are classified according to gender and job type. The following table summarizes the number of people in each job category.
Job Male (M) Female (F)
Administrative (AD) 110 10
Salaried staff (SS) 30 50
Hourly staff (HS) 60 40
If an employee is selected at random, what is the probability that the employee is female given that the employee is a salaried staff member.
Graph one shows a number of observations that all are directly on trend line that moves from the top left of the graph to the bottom right.
(a) Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to (a) and (b) to someone who has never had a course in statistics.
For a binomial probability experiment, with n=150 and p=.2, it is appropriate to use the normal approximation to the binomial distribution.
Test the mean cholesterol content in the egg is greater than 2.5 percent
Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0.
Clouds were randomly seeded or not with silver nitrate. Rainfall amounts were recorded from the clouds. The purpose of the experiment was to determine if cloud seeding increases rainfall. The following data is obtained:
A battery manufacturing plant normally operates two eight-hour shifts per day and 6 days per week. The manufacturer can produce 375 units per hour.
What is the smallest level of significance at which you could reject the null in favor of the alternative hypothesis?
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
Using a 1% level of significance, can we say that there is a difference in the average waiting time between the two shops? Find the critical value(s).
The Texas Transportation Institute at Texas A&M University conducted a survey to determine the # of hours per year drivers waste sitting in traffic.
Would you play this game if you wanted to make money? What do we expert the value of the results of the game to be?
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