One item on a questionnaire asks \"How many siblings (brothers and sisters) did

Question

One item on a questionnaire asks "How many siblings (brothers and sisters) did you have when you were a child?' A researcher computes the mean, the median, and the mode for a set of n = 50 responses to this question. Which of the following statements accurately describes the measures of central tendency? a. Because the scores are all whole numbers, the mean will be a whole number b. Because the scores are all whole numbers, the median will be a whole number c. Because the scores are all whole numbers, the mode will be a whole number d. All of the other options are correct descriptions. A researcher is measuring problem-solving times for a sample of n = 20 children. However, one of the children fails to solve the problem so the researcher has an undetermined score. What is the best measure of central tendency for these data? a. The mean b. The median c. The mode d. Central tendency cannot be determined for these data Which of the following samples would have the largest value for sample variance? a. 1, 3, 5 b. 11, 13, 15 c. 51, 53, 55 d. All the samples would have exactly the same variance Under what circumstances a score that is 15 points above the mean would be considered an extreme score? a. When the population mean is much larger than 15 b. When the population standard deviation is much larger than 15 c. When the population mean is much smaller than 15 d. When the population standard deviation is much smaller than 15 Indicate whether each of the statements is true or false by placing either a T or F in the space provided at the end of the statement. Each question is worth 1 point. The goal of descriptive statistics is to simplify, summarize, and organize data ___. To compute (Sigma X)^2 you first sum the scores and then square the total _________.

Explanation / Answer

10). D: All of the other options are correct description .

( Because all of the statement accurately describes the measure of central tendency.)

11). A : The mean ( using time unit)

12). D : All the sample would have exactly the same variance. (Dispertion are same between value )

13). D : When the population standard deviation is much smaller than 15.

# true or False

1 ). True

2). True

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