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The average weight of 40 randomly selected minivans was 4150 pounds. The standard deviation was 480 pounds. Find the 99% confidence interval of the true weight of the minivans.
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
Develop the estimated regression line. Jensen expects to use the machine 30 hours per week, develop a 95% prediction interval for the company's annual maintenance expense.
Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations
When sampling is done for the proportion of defective items in a large shipment, where the population proportion is 0.18 and the sample size is 200, what is the probability that the sample proportion will be at least 0.20?
In a class of 40, 16 driver a car made outside the United States. What is the confidence interval for the total population of students at the 95% level?
For population with mean of µ=60 and a standard deviation of s=24. Determine the z score corresponding to each of following samples.
The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?
To find the necessary sample size to achieve the given level of accuracy of prediction.
With the test statistic you chose, work out the problem with solution using .05 level of significance if it applies.
The flashlight batteries produced by one of the northern manufacturers are known to have an average life of 60 hours with a standard deviation of 4 hours. Use Chebyshev's theorem to answer the following questions.
Correlation based on Scatter Plot - Draw the scatter plot for the variables.
What is the probability that there will be more than three trucks either being loaded or waiting?
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