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Quiz-Statistics & Probability-Week 4

Quiz by Kimberly Mae Isaac

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10 questions
Show answers
  • Q1
    Which of the following is NOT a property of Standard Normal Distribution
    The total area under the standard normal curve is equal to 1.
    The mean, median and mode are equal.
    The tails of a standard normal curve are asymptotic relative to the horizontal line.
    The standard deviation is equal to 0 and mean is equal to 1.
    30s
  • Q2
    In a normal distribution, changing the mean shifts the distribution to
    up or down
    steep or flat slope
    not shifting at all
    left or right
    30s
  • Q3
    Which of the following is at the center or peak of the normal distribution?
    Mean
    Probability
    Standard Deviation
    Variance
    30s
  • Q4
    Using the z-table, find the area that corresponds to z = - 2.18.
    0.4857
    0.4850
    Cannot be determined
    0.4854
    30s
  • Q5
    Using the z-table, find the area that corresponds to z = 0.56.
    0.2190
    0.2157
    0.2123
    0.2088
    30s
  • Q6
    Using the z-table, find the area that corresponds to z = 2.03.
    0.4783
    0.4793
    0.4788
    0.4778
    30s
  • Q7
    Using the z-table, find the area that corresponds to z = - 1.17.
    0.3810
    0.3770
    0.3790
    Cannot be determined
    30s
  • Q8
    The random variable X is best described by a normal distribution with µ= 30 and σ = 6. Find the z-score that corresponds to X = 21.
    z = - 1.50
    z = 0.50
    z = - 0.50
    z = 1.50
    45s
  • Q9
    The random variable X is best described by a normal distribution with µ= 30 and σ = 6. Find the z-score that corresponds to X = 42.
    z = 1.20
    z = - 2.00
    z = 2.00
    z = - 1.20
    45s
  • Q10
    Given: µ = 30, σ = 4.50. What is the raw score when z = 1.25?
    X = - 6.39
    X = - 24.38
    X = 136.25
    X = 35.63
    60s

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