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Question

1089% SmartArt Paragraph Styles Emphasis Ul Heading 1 L Nomad Strong subtitle Multiple Choices: Choose the best answer. 1. Without doing any calculations, describe the relationship for the following pains of observations. 118 12 109 144 10 111 1 142 a) positive b) negative c) or no relationship d) impossible to describe 2. Although there are exceptions, a value of r in excess of .50, in either a positive or negative direction, would represent a) an unimportant relationship in most areas of behavioral research. b)a weak relationship in most areas of behavioral research. c)avery strong relationship in most areas of behavioral research. d)a virtually perfect relationship in most areas of behavioral research. 3. there is a correlation between the age of schoolchildren and their reading comprehension. you could speculate about the basis for this relationship. Probably the most reasonable speculation is that a) age causes reading comprehension. b) age could cause reading comprehension, or both could be effects of some more basic cause. c) some more basic combination of factors, such as intellectual maturation and educational background, causes the relationship. d) Done of the above 4. Regression toward the mean refers to a tendency for a) moderate scores to deviate from the mean b) moderate scores to move toward the mean. c) extreme scores to deviate from the mean. d) extreme scores to move toward the mean, 5. When testina a hvoothesis. reiection reaions are located in the 1 of 6 Words: 23 of 1675 L

Explanation / Answer

1) The relationship between X and Y is negative because the small values of X have larger values of the corresponding Y values and vice - versa.

So correct option is b)

2) If the value correlation coefficient are closed to -1 or 1 then the relationship between two variable is very strong

here r is excess of 0.5 in either direction so there is strong relationship

so correct option is c).

3) The correct option is C because some other factors(variables) are affect reading comprehension and not only age is on of the variable of them.

4) The correct option is d) Because extreme values affect the regression line and if the move toward central then regression move toward central.

5) The correct option is a) because for two tail test rejection region is the extreme area from +/- test statistic value and middle area is nothing but the probability of acceptance.

6) Level of significance is nothing but the probability of rejecting H0 when it is actually true.

So it is rarely reject null hypothesis when it is actually true so the correct option of question 6 is d)

7) The given critical values are - 1.96 and 1.96

Since -2.40 is not lies in between -1.96 and 1.96 so we reject null hypothesis.

So correct option is b) reject the null hypothesis.

8) Variability of the sampling distribution depend on sampling size and it is inversely proportion with the square root of sample size so when we increase sample size then the variability of sampling distribution decreases.

So correct option is b)

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