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A film developer claims that the mean number of pictures developed for a camera with 24 exposer is less than 22. If the hypothesis test is preformed, how should you interpret a decision a)reject the null hypothesis and b) fail to reject the null hypothesis.
A computer diskette manufacturer is concerned that some diskettes have bad sectors that would cause a diskette to hold less information than it was intended to hold.
Compute the mean, median, and mode. Which of these measures of central tendency do you think most accurately describes the lifestyle variable you are looking at?
Comparing the experimental and theoretical probabilities, can you say the die used in this experiment is a fair die? Why or why not?
The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the department needs to estimate the average number of vehicles that pass an intersection each day. A random sample of 64 ..
Find out the mean sum of squares of the treatment in one way ANOVA.The profits of individual traders in three departments, labelled by A, B and C, in a medium sized firm were recorded on one day.
At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
What sample size would be needed to estimate the true proportion of students at your college
It is impossible to get a negative value for an F -ratio.
The Johnson family uses a propane tank for cooking on their gas grill. During the summer they need to replace their tank on average every 30 days.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
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