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1. Calculate all measures of central tendency for data that are interval or ratio in measurement2. Calculate the standard deviation for data that are interval or ratio in measurement3. Assume this is a sample of students, calculate a t-test that compares boys and girls on the number of absences (you can assume equal variances). Is there a significant difference in absences between gender?4. Assume this is a sample of students and that students receive an A grade if their score is 90 or above.1. Calculate a chi-square test to determine whether girls achieve more A grades than boys in math.2. Calculate a chi-square test to determine whether girls achieve more A grades than boys in reading.
Standard Test Scores
Name Gender Absences PE Math Writing ReadingAlex Boy 5 49 85 86 80Anthony Boy 18 51 39 71 75Douglas Boy 1 82 74 78 79Jorge Boy 4 56 66 68 60Joshua Boy 5 83 79 78 77Luke Boy 0 94 89 84 84Robert Boy 17 36 36 56 50Rupert Boy 4 24 55 56 52Seth Boy 0 61 92 89 83Wayne Boy 1 65 92 96 91Blair Girl 3 94 59 66 90Brooke Girl 2 75 35 43 46Carmen Girl 0 49 91 91 90Charlita Girl 16 23 49 55 49Kim Girl 2 71 90 92 95Li Girl 1 73 98 93 95Rachel Girl 2 92 87 92 91Sara Girl 3 33 87 93 94Sheetal Girl 0 18 100 97 97Tawayna Girl 14 31 65 55 63
Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 10 classes.
A United Nations report shows the mean family income for Mexican migrants to the United States is $27,000 per year. A FLOC(Farm Labor Organizating Committee) evaluation of 25 Mexican family units reveals a mean to be $30,000 with a sample standard..
What is the sample proportion from an American Express sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?
For each of the following three populations, indicate what the sampling distribution for samples of 25 would consist of: Travel expense vouchers for a university in an academic year.
Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?
LINEAR PROGRAMMING MODELS
A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both.
A plus four 95% confidence interval for the difference between the two population proportions of wrist injuries is: A. 0.2909 ± 0.1674. B. 0.2909 ± 0.1069. C. 0.2909 ± 0.0907. D. 0.2909 ± 0.1275
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
The mean age of adult learners in a chosen class of 31 students is 33.8 years. The standard deviation is equal to 7 years.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
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