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The professor is designing a multiple choice test. There are to be 10 questions. Each question is to have five choices for answers. The choices are to be designated by the letter a, b, c, d, and e. The professor wishes to use a random-number table to determine which letter choice should correspond to the correct answer for a question. Using the number correspondence 1 for a, 2 for b, 3 for c, 4 for d, and 5 for e.
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
Compute the range and interquartile range
Using the probabilities above what is the expected size of family you draw?
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
Iindicate all samples are approximately Normal with no outliers. Is the ANOVA appropriate?
Each egg was also measured for volume using a water displacement method. We wanted to know if the two methods agreed or not
each person received was determined by randomization. For each person who was sent one of the surveys, the researcher recorded whether or not a completed survey was returned.
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
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