Bias is a synonym for Mean Absolute Deviation.
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- What is the meaning of x ~ N (50, 20)? 1. Sampling distribution of x is distributed with a mean of 20 and a standard deviation of 50 2. x-bar is normally distributed with a mean of 20 and a standard deviation of 50 3. x is normally distributed with a mean of 50 and a standard deviation of 20 4. Sampling distribution of x is distributed with a mean of 50 and a standard deviation of 20As employees leave a company, they are asked to rate their level of job satisfaction during the time they were employed by the company. A sample set of scores (out of a maximum of 10) is provided below. 3 6 4 4 5 2 1 3 2 5 3 7 2 2 3 1 9 1 Use the information provided in the table to calculate: The median; The mode; The mean; The lower quartile (Q1); The upper quartile (Q3); The interquartile range (IQR); The standard deviation. State whether or not the ex-employees were likely to have left the company as a result of lack of job satisfaction. Use the statistics above to justify your conclusion. Discuss in which ways the company could benefit from making these statistics available to its current employees.Which 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
- What is the meaning of x ̅ ~ N (50, 2)? 1. The Sampling distribution is distributed normally with a mean of 50 and a standard deviation of 2 2. Sampling distribution of x is distributed normally with a mean of 2 and a standard deviation of 50 3. x is normally distributed with a mean of 50 and a standard deviation of 2 4. x-bar is normally distributed with a mean of 2 and a standard deviation of 50Mrs. Alaa works on developing staff training programs in Al Bustan Hotel to improve the services provided by the hotel She has been working their since 1990 and she mainly uses customers feedback on social media & customer complaints to forecast future training needs. The method used by Mrs. Alaa is a. Delphi b. Judgmental C Associative models d. Time seriesJenny Fox evaluates managers who have a cross-sectional population standard deviation of returns of 8%. If returns are independent across managers, how large of a sample does Fox need so, the standard error of sample means is 1.265%? 7. 30. 40.
- 21. Stratified random sampling is a method of sampling that involves the division of a population into smaller groups known as strataSelect one:TrueFalseA 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?The accuracy of the point estimate is measured by its a. sampling error. b. standard error. c. standard deviation. d. nonsampling error.
- Which of the following describes the data observation that occurs most frequently? 1. Mean 2. Median 3. Mode 4. Range 5. Standard deviation10-Which one of the following is not an example of non-probability sampling technique? a. Convenience sampling b. Quota sampling c. Judgement sampling d. Cluster samplingWhich of the following would be an advantage of using variables sampling ratherthan probability-proportional-to-size (PPS) sampling?(1) An estimate of the standard deviation of the population’s recorded amount isnot required.(2) The auditor rarely needs the assistance of a computer program to design anefficient sample.(3) The inclusion of zero and negative balances usually does not require specialdesign considerations.(4) Any amount that is individually significant is automatically identified andselected.