Bias is a synonym for Mean Absolute Deviation.
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- what is Probability sampling and non-probability sampling?A survey of 40 retail store reported the following amount of sales (in thousand) held in the month of September. Number of Sales Frequency 10-14 3 15-19 5 20-24 12 25-29 9 30-34 8 35-39 3 What is the standard deviation? What is the sample variance?You want to provide an overview of the characteristics of the respondents in your sample. Which of the following would you use to provide insight in the age of your respondents? a. A frequency table and a bar chart b. The mode, median and the standard deviation c. The mean and the variance. d. The mean, the median, and the mode
- Sample variance: sample standard deviation:#8 A cracker manufacturer wants to know how a new cracker she wants to make compares to the competition, so she has people in a sample of supermarkets across the country ask people to compare three crackers: one of her crackers and two competing crackers. This is an example of what kind of statistical study? Experiment Survey Observational StudyI need help explaining probability and non-probability sampling and describing the different types of each?
- Failing to identify a hypothesized difference using a sample result when a difference really does exist in the population is a ____ error. options are primary secondary type I Type IICalculate the mean and standard deviation for the following distribution Class 1 2 5 6-10 10-20 20-30 30-50 50-70 70-100 f 3 4 10 23 20 20 15 3 2Which of the following involves a test of two-related samples? Multiple Choice Test of whether the mean salary of professors at Metro University is higher than the national average for university professors Test of differences in the percent of men and women who are or are not members of Greek organizations on campus Test of whether a change occurred in the proneness for heart disease among people who switched to a diet high in fish Test of the average incomes of subscribers of Southern Living and Better Homes and Gardens Test of differences in ad recall among three experimental groups (each of which saw a different advertisement) and a control group
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