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On opening day one season, 10 major league baseball games were played and they lasted the following numbers of minutes.
167 211 187 176 170 169 198 218 145 232
Find the sample variance. Round your answer to two decimal places
Assuming a normal distribution, What is the z-score associated with the second quartile? If we wish to have 95% confidence interval, what would be the value of the confidence coefficient?
Use a scatter plot to determine the relationship between the x values and the y values.
In order to compare the mean charges for the three groups, the data will be subjected to an analysis of variance. Write the null hypothesis tested by the ANOVA.
At the level of significance, is there evidence that the population mean force is greater than 1500 pounds?
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
At the 0.05 significance level, can Ms. Bridgend conclude that she is earning an average of more than $20 in tips?
Which probability distribution is suitable when sampling without replacement?
You are concerned about wait times at the cash registers in the supermarket. You collect data and have a sample size of 10, which test would you use a Z or a T test and why?
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years.
Two events are mutually exclusive: If their intersection is 1, If they have no sample points in common.
The area under a normal curve is always equal to 1, no matter what the mean and standard deviation are.
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