Exam 3: Statistical Parameters: Measures of Central Tendency and Variation

The "unbiased" aspect of an unbiased estimator indicates that

The following is a list of annual salaries (in dollars) for a group of mid-level managers in a large company. 98,000 115,000 75,000 88,000 65,000 107,000 72,000 71,000 88,000 57,000 88,000 73,000 97,000 85,000 87,000 73,000 93,000 88,000 71,000 65,000 87,000 83,000 75,000 44,000 81,000 76,000 81,000 89,000 -What is the mode salary (rounded to a whole number)?

The following is a list of annual advertising expenses (in dollars) for a group of states' mental health centers. 1500 11,000 7500 800 600 2350 3000 3800 500 6000 8000 500 1750 1250 50 3400 9000 890 1600 2200 -What is the standard deviation of the advertising expenses (rounded to a whole number)?

Approximately how many students will have IQs greater than 100?

The following is a list of annual advertising expenses (in dollars) for a group of states' mental health centers. 1500 11,000 7500 800 600 2350 3000 3800 500 6000 8000 500 1750 1250 50 3400 9000 890 1600 2200 -What is the mode advertising expense (rounded to a whole number)?

Approximately how many students should have IQs greater than 130?

The following is a list of annual salaries (in dollars) for a group of mid-level managers in a large company. 98,000 115,000 75,000 88,000 65,000 107,000 72,000 71,000 88,000 57,000 88,000 73,000 97,000 85,000 87,000 73,000 93,000 88,000 71,000 65,000 87,000 83,000 75,000 44,000 81,000 76,000 81,000 89,000 -What is the standard deviation of the salaries (rounded to a whole number)?

What is the median for the previous set of scores?

Which of the following is NOT true of the mean?

What is the mode score, and what is its frequency?

Approximately how many students will have at least an IQ of 100 but not greater than 115?

With respect to the mean and the median values of the previous set of scores, which of the following is true?

The following is a list of annual salaries (in dollars) for a group of mid-level managers in a large company. 98,000 115,000 75,000 88,000 65,000 107,000 72,000 71,000 88,000 57,000 88,000 73,000 97,000 85,000 87,000 73,000 93,000 88,000 71,000 65,000 87,000 83,000 75,000 44,000 81,000 76,000 81,000 89,000 -What is the median of the salaries (rounded to a whole number)?

What is the variance (rounded to one decimal place) of the previous set of scores?

The following is a list of annual advertising expenses (in dollars) for a group of states' mental health centers. 1500 11,000 7500 800 600 2350 3000 3800 500 6000 8000 500 1750 1250 50 3400 9000 890 1600 2200 -What is the mean of the advertising expenses (rounded to a whole number)?

What is the range of the previous set of scores?

The most common IQ tests have a standardized mean of 100 and a standard deviation of 15.Based on this information, use the empirical rule to answer the following question: If approximately 348 prospective college students are tested for their IQ, approximately how many will fall within one standard deviation of the mean?

The following is a list of annual advertising expenses (in dollars) for a group of states' mental health centers. 1500 11,000 7500 800 600 2350 3000 3800 500 6000 8000 500 1750 1250 50 3400 9000 890 1600 2200 -What is the median of the advertising expenses (rounded to a whole number)?

What is the standard deviation (rounded to one decimal place) for the previous set of scores?

The following is a list of annual salaries (in dollars) for a group of mid-level managers in a large company. 98,000 115,000 75,000 88,000 65,000 107,000 72,000 71,000 88,000 57,000 88,000 73,000 97,000 85,000 87,000 73,000 93,000 88,000 71,000 65,000 87,000 83,000 75,000 44,000 81,000 76,000 81,000 89,000 -The top salary in the previous set was $115,000.Would you consider that salary