Confidence Interval Estimation MCQ with Answers PDF Download – Test 56

MCQ 276: If the point estimate is 8 and the margin of error is 5 then the confidence interval is:

1. 3 to 13
2. 4 to 14
3. 5 to 15
4. 6 to 16

MCQ 277: The three times of difference between mean and median is divided by standard deviation to calculate coefficient of skewness by method of:

1. Professor Keller
2. Professor Bowley
3. Karl Pearson
4. Professor Kelly

MCQ 278: The probability distribution of discrete random variable is classified as:

1. probability mass function
2. posterior mass function
3. interior mass function
4. continuous mass function

MCQ 279: The standard normal probability distribution has mean equal to 40, whereas the value of random variable x is 80 and the z-statistic is equal to 1.8 then the standard deviation of standard normal probability distribution is:

1. 120
2. 80
3. 40
4. 20

MCQ 280: If a brown sack consists of 4 white balls and 3 black balls then the probability of one randomly drawn ball will be white is:

1. 4 ⁄ 7
2. 1 ⁄7
3. 4 ⁄ 4
4. 4 ⁄ 3