A sample of 15 observations has a standard deviation of 4. The sum of the squared deviations from… 1 answer below »
1. A sample of 15 observations has a standard deviation of 4. The sum of the squared deviations from the sample mean is: (Points: 2)A) 19B) 56C) 60D) 2242. A sample of 13 monthly sales figures (in thousands of dollars) are: 10, 6, 5, 10, 9, 7, 10, 9, 6, 8, 9, 6, and 6. What is the value of the sample standard deviation. (Points: 2)A) 2.81B) 3.18C) 1.83D) 2.113. A sample of 13 monthly sales figures (in thousands of dollars) are: 10, 6, 5, 10, 9, 7, 10, 9, 6, 8, 9, 6, and 6. What is the coefficient of variation? (Points: 2)A) 11.25B) 35.28C) 10.45D) 23.564. Chebyshev’s Theorem states that the percentage of observations in a data set that should fall within five standard deviations of their mean is: (Points: 2)A) 90%B) at least 90%C) 96%D) at least 96%5. If the coefficient of correlation r= 0 , then (Points: 2)A) the slope of the regression line is zeroB) there is no linear relationship whatsoever between the dependent variable y and the independent variable xC) the coefficient of determination is zeroD) All of the above are correct6. The Greek letters µ and s are examples of population parameters. (Points: 2)TrueFalse7. The convenience sample is an example of probability sampling where every person or element in the population may not have an equal chance for inclusion in the sample. (Points: 2)TrueFalse8. When the respondents to a questionnaire have different characteristics from those who did not choose to participate in the survey, the survey will likely suffer from: __________. (Points: 2)A) Sampling ErrorB) Response ErrorC) Non-response ErrorD) None-sampling Error9. Which of the following variables probably could be measured in an observational study of airline travelers? (Points: 2)A) The brand of coffee they drink at home.B) The occupation of the traveler.C) How many frequent traveler miles they have earned.D) The gender of the traveler.10. In a(n) _______ sample, the population is divided into layers; then a simple random sample of members from each layer is selected. (Points: 2)A) Simple RandomB) StratifiedC) SystematicD) Conveniece
