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1. What value of Cronbach's alpha coefficient indicates acceptable interitem reliability?
2. Why are researchers sometimes not able to test the reliability of their measures?
3. What steps can be taken to increase the reliability of measuring techniques?
The number of items rejected daily by a manufacturer because of defect for the last 30 days are 22, 21, 8, 17, 25, 20, 18, 19, 14, 13, 11, 6, 21, 23, 4, 19, 11, 12, 16, 16, 10, 28, 24, 6, 21, 20, 25, 5, 17, 9. Complete this frequency table for the..
questiona if a person is randomly selected find the probability that his or her birthday is october 18 which is
carter motor company claims that its new sedan the libra will average better than 21 miles per gallon in the city.
For each of the following parametric tests, identify the appropriate non-parametric counterpart: This problem belongs to Statistics and it discusses about identifying appropriate non-parametric counter parts for various tests
We suspect that the average fasting blood sugar level of Mexican Americans is 108. A random sample of 225 clinic patients (all Mexican American) yields a mean blood sugar level of 119 (S2 = 100). Test the hypothesis that µ. = 108. What is the ..
In a sample of 450 students from different countries, we found that the number of students in private school in that sample was 50 students.
Let sales be the independent variable and earnings be the dependent variable. Draw a scatter plot. Compute the coefficient of correlation Compute the coefficient of determination.
In a surgey of 280 adults over 50.80%; said they were taking vitamin supplements. Find the margin of error for this survey if we want a 99% confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
new car design specifications are being considered to control the variation of the head injury measurements. use the
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
The administration of Midwest State University wants to know if arrangement of chairs affects student participation in classrooms. What would be a good operational definition of the dependent variable in an experiment designed to measure this rela..
the mean and the standard deviation of the sample of 40 trash bag breaking strengths are 50.575 and 1.6438
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