Back to quiz

6. mode>median>mean means that the distribution is

  • normal
  • negatively skewed
  • symmetrical
  • positively skewed

7. If Q2-Q1<Q3-Q2 then the distribution is

  • positively skewed
  • negatively skewed
  • symmetrical
  • uniform

8. For a histogram data needs to be

  • coded
  • continuous
  • discrete
  • qualitative

9. A tree diagram shows

  • skewness
  • distribution of data
  • probability of events
  • a normal distribution

10. Mutually Exclusive events have

  • no outcomes in common
  • one repeated outcome
  • three outcomes happening at the same time
  • several outcomes in common

11. Events are independent if they have

  • no effect on each other
  • no outcomes in common
  • a positive effect on each other
  • a negative effect on each other

12. The Product Moment Correlation Coefficient is not affected by coding

  • True
  • False

13. r=-1 implies

  • weak negative correlation
  • no correlation
  • perfect negative correlation
  • perfect positive correlation

14. The equation of the line of regression is

  • y=a+bx
  • y=a-bx
  • x=bx+a
  • y=mx+c
  • y=b+ax

15. Extrapolation is unreliable because

  • the value is inside the range of the data
  • the value is outside the range of the data
  • the data set is too small
  • the values are rounded

16. A Sample Space is

  • a list of all possible outcomes
  • an event
  • a set of discrete data

17. A Random Variable may be

  • discrete or continous
  • discrete
  • continuous
  • neither discrete or continuous

18. E(aX+b) =

  • a E(X)
  • E(a)+E(X)+E(b)
  • aE(X)+b
  • a squared E(X)
  • b squared E(X) +a

19. When all the probabilities are the same the discrete random variable is

  • outfit
  • binomial
  • uniform
  • normal

20. The normal distribution Z has

  • any mean and standard distribution
  • mean 1 and standard distribution 1
  • mean 0 and standard distribution 1
  • mean 0 and standard distribution 0