4

Question 1

35. A recent survey of a sample of 250 High School students reported the average weight of 54.3 kg. Is the statement describing a parameter or statistic?

Answer 1

STATISTIC

Question 2

36. Average age of students in Northills College of Asia, Labo Campus. Is the statement describing a parameter or statistic?

Answer 2

PARAMETER

Question 3

37. Classify random variable as Discrete Random Variable or Continuous Random Variable: Scores of a student in a 10 - item test.

Answer 3

DISCRETE RANDOM VARIABLE

Question 4

38. Classify random variable as Discrete Random Variable or Continuous Random Variable: Duration (in minutes) of a movie that does not exceed 2 hours.

Answer 4

CONTINUOUS RANDOM VARIABLE

Question 5

39. Classify random variable as Discrete Random Variable or Continuous Random Variable: Length (in cm) of a shoelace that is not longer than 2 meters.

Answer 5

CONTINUOUS RANDOM VARIABLE

Question 6

40. Classify random variable as Discrete Random Variable or Continuous Random Variable: Number of pages a Statistics book has.

Answer 6

DISCRETE RANDOM VARIABLE

Question 7

41. Classify random variable as Discrete Random Variable or Continuous Random Variable: Number of heads in 4 flips of a coin.

Answer 7

DISCRETE RANDOM VARIABLE

Question 8

42. Determine the area BELOW z = 2.14

Answer 8

LEFTMOST: 2.1

TOPMOST: 0.04

INTERSECTION: 0.9838

Question 9

43. Determine the area BELOW z = - 0.12

Answer 9

LEFTMOST: -0.1

TOPMOST: 0.02

INTERSECTION: 0.4522

Question 10

44. Determine the area ABOVE z = - 1.64

Answer 10

LEFTMOST: -1.6

TOPMOST: 0.04

INTERSECTION: 0.0505

AREA: 1 - 0.0505 = 0.9495

Question 11

45. Determine the area ABOVE z = 2.33

Answer 11

LEFTMOST: 2.3

TOPMOST: 0.03

INTERSECTION: 0.9901

AREA: 0.9901 = 0.0099

Question 12

46. Find the area BETWEEN z = - 2.35 and z = 1.68

Answer 12

LEFTMOST: -2.3

:1.6

TOPMOST: 0.05

:0.08

INTERSECTION: 0.0094

:0.9535

AREA: 0.9535 -0.0094 = 0.9441