1. The quantity that is arrived at by taking the highest score minus the lowest

Question

1. The quantity that is arrived at by taking the highest score minus the lowest score is referred to as the? interquartile range range c. standard deviation d. variance 2. If two distributions of scores have the same mean, they have the same standard deviation. 3. The sum of all possible outcomes of an event is greater than one 4. The normal curve is statistically characterized by its an 5. Roughly percent of the area under the normal curve lies between the mean and two standard deviations above the mean. a. 50 b. 34 . 48 d. 65 6. Samples are used in order to make accuratea about a larger_ 7. The spread or dispersion of a distribution is commonly referred to as: a. the variance b. the range c. the standard deviation d. variability 8. The goal of all techniques for selecting random samples is to select samples that are a. very large c. easily located b. non-random d. representative

Explanation / Answer

1) Range=max of data - min of data

2) False,it is not complusory to have same standard deviation. because both datas will have different variation in them.

3)False, it can not exceeds one. it can sum upto 1 and even not below 0.

4) its mean and standard deviation

5) 48%

6)samples are used in order to make accurate inference about larger population size.

7)the variance

8)representative: it should represent population properly

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