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1. Construct a frequency distribution table to organize the following set of data:
109 114 111 109 109 106 110 114 114 112 111 110 114 114 110 113 114 105 107 107.
2. Construct a grouped frequency distribution for the following 28 scores using a class width of 4:
84 82 87 74 77 72 85 72 80 82 66 69 67 65 80 75 70 69 67 78 65 88 72 84 65 75 79 71.
3. Provide a different example for each of the following types of variables from your work or home life:
A) A continuous variable B) An ordinal level of measurement.
The data follow. Males Females 27 25 25 29 19 18 10 23 16 20 22 15 14 19 (a) What statistical test should be used to analyze these data?
(a) Give a 95% confidence interval for the mean ARSMA score of Mexicans. (b) What assumptions does your condence interval require?
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Study the effect of temperature on yield in a chemical process, four batches were produced at each of three temperature levels and construct an analysis of variance table
An olympic archer is able to hit the bull's-eye 70% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what is the probablitly that she never misses?
The Wall Street Journal reported some interesting statistics on the job market. One statistic is that 40% of all workers say they would change jobs for "slightly higher pay."
At the .10 significance level you will test to determine if there has been an increase in selling time. Is this a 1 or 2 tail test?
Use the population standard deviation along with the sample mean, S, and find a 92% confidence interval for the population mean. Is the true population mean contained in this interval?
Determine if you would reject or fail to reject the null hypothesis in each of the following cases: (a) z=1.06 (b) z=2.06 (c) A z score beyond which 7% of the data fall in each tail.
Many companies use sampling to determine whether a batch should be accepted. A (n, c) sampling plan consists of inspecting n randomly selected items from a batch and accepting the batch if c or fewer sampled items are defective.
The Air Transport Association of America published figures on the busiest airports in the United States. The following frequency distribution has been constructed from these figures for the year 2000.
What is the probability that fewer than 59 CEOs agree that it is attractive to have a joint venture to increase global competitiveness and what is the probability that between 53 and 61 (inclusive) CEOs agree with that assertion?
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