Section-I State whether the following statements are True or False. (6 marks, 1

Question

Section-I State whether the following statements are True or False. (6 marks, 1 Mark Each) 1. A fair coin is tossed 6 times. The probability of it lands tails up exactly 3 times is 10x ( 2. A frequency distribution groups data into classes showing the number of observations in each class. 3. If probability sampling is done, each item in the population has a chance of being chosen. 4. A critical value is a Z-score separating unlikely value from those that are likely to occur. 5. A point estimate is a single value or point used to approximate a population parameter. 6. The number of women taller than 68 inches in a random sample of 5 women is an example of continuous random variable.

Explanation / Answer

1. The probability of landing tails exactly 3 times out of 6

= 6C3 * 0.53 * 0.53

= 20 * 0.56

= 20 * 0.5 * 0.55

= 10 * 0.55

(Note the question is incomplete.).

2. A frequency distribution groups data into classes showing the number of observations in each class.

True.

3. If probability sampling is done, each item in the population has a chance of being chosen.

True.

4. A critical value is a z-score separating unlikely value from those that are likely to occur.

True.

5. A point estimate is a single value or point used to approximate a population parameter.

True.

6. The number of women taller than 68 inches in a random sample of 5 women is an example of continuous variable.

False.

The number is a discrete value.

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