STA301 Quiz 2

Q1. If we calculate the probability of an event and it turns out to be -.7, we know that:

1. the event is probably not going to happen
2. . the probability of it not happening is .3
3. the event is probably going to happen
4. we made a mistake

Q2. In regression analysis, the variable that is being predicted is the

1. None of these
2. Independent variable
3. Dependent variable
4. Intervening variable

Q3. In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?

1. 54
2. 63
3. 86
4. 156

Q4. What does the set comprising all possible outcomes of an experiment known as

1. None of the above
2. Null event
3. Sure event
4. Elementary event

Q5. In a five number summary, which of the following is not used for data summarization?

1. the largest value
2. the smallest value
3. the mean
4. the 25th percentile

Q6. Given the least squares regression line Y^= 5-2x:

1. as x decreases, so does y
2. the relationship between x and y is positive
3. None of the above
4. the relationship between x and y is negative

Q7. An event that contains only one sample points is called:

1. Compound event
2. Simple event
3. Normal event
4. Mutually exclusive event

Q8. For a symmetrical data set mean value is 150 and standard deviation 25. 99.73 %( approximately all) values will lie between

1. (125,180)
2. (100,200)
3. (75,225)
4. (125,175)

Q9. Empirical rule is considered when the data is

1. Negatively skewed
2. Positively skewed
3. Skewed
4. Symmetrical

Q10. If a fair coin is tossed 2 times then probability that two heads appear is equal to:

1. 1/3
2. 1/2
3. 1/5
4. 1/4