STATISTICS (STAT-101) Marks- 30 Answer all the Questions on the same question pa

Question

STATISTICS (STAT-101) Marks- 30 Answer all the Questions on the same question paper 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) (a) Standard Normal has mean = 0, variance = 1

2) (a) 10% of 35 = 3.5

3) (b) the sample size will decrease

4) (b) one (standard deviation of normal distribution =1)

5) (d) n-1

6) (d) standard dev * z score + mean = 30.1

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