Question

1. A survey will be given to 50 students randomly selected from the freshmen class at UOWD

A) The 50 students

B) All students at UOWD

C) All freshmen at UOWD

D) All students at the UK universities.

2. Researchers are concerned that the average age of a certain type of a bird is decreasing implying, among other things, that more environmental measures should be taken. If X is the age of the birds sampled in a nationwide study, then X is an example of

A) A categorical random variable.

B) A discrete random variable.

C) A continuous random variable.

D) A parameter.

3) A researcher is interested in the travel time of Utrecht University students to college. A group of 100 students is interviewed. Their mean travel time in 12.7 minutes. For this study, the mean of 12.7 minutes is an example of a(n)

A) Parameter

B) Sample

C) Population

D) Statistic

4. Ahmed needs an average of 80% to pass a qualification. The qualification consists of three equal parts having the same weight. He scored 60% and 91% in the first two parts respectively. What is the minimum score needed in part 3 for Ahmed to pass the qualification?

A) 89

B) 90

C) 91

D) 92

5. In left-skewed distributions, which of the following is the correct statement?

A) The distance between ?1and ?2is greater than the distance between ?2and ?3 .

B) The median is equal to the arithmetic mean.

C) The distance between ?1and ?2 is less than the distance between ?2and ?3.

D) The arithmetic mean is higher than the median.

6. Which of the following is most sensitive to extreme values?

A) The arithmetic mean

B) The interquartile range 3

C) The median

D) The first quartile

7. Which of the following statistics is a measure of central tendency?

A) Median

B) ?3

C) Range

D) Variance

8. If two events are NOT mutually exclusive, what is the probability that both occur at the same time?

A) 0

B) 0.50

C) 1.00

D) Cannot be determined from the information given

9. Given that events A and B are independent, P (A) = 0.25 and P (A and B) = 0.15. Find P (B).

A) 1.67

B) 0.60

C) 1.00

D) Cannot be determined from the information given

Answer 1

All Freshmen at vowo option 2 option © A contineous Random Variable Age is contineous L 3 option ® Statistics - X, +Xz+X37 80 91 +60+ X₂ >80 X₂=89 option (A - (5 Ophon The distance between a fo2 is greater than distance between 92 493

6 option ( Arithmatic mean (7 option median other options are measure of dispersion 8 ophon 9 PCA) = 0.25 & PCA AND B J = 0.15 PCA AND B) = PCA). PCB) [ Af Baze independent 0.15= 0.25 PCB) PCB)=/0.60 PCB option 6