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Quiz-Statistics & Probability-Week 4.2

Quiz by Kimberly Mae Isaac

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10 questions
Show answers
  • Q1
    Suppose the average time required to process the customers’ transaction in Landbank Meycauayan is 15 minutes with a standard deviation 5 minutes. If the processing time is normally distributed, what is the probability that the customer chosen at random will finish his/ her transaction in less than 10 minutes?
    15.87%
    34.13%
    84.13%
    65.87%
    120s
  • Q2
    Given X = 25, μ = 15, σ = 3, compute for the z-score.
    z = 3.33
    z = 1.47
    X = - 1.47
    z = - 3.33
    45s
  • Q3
    Given z = 2.00, μ = 34, σ = 3, what is the value of the normal random variable (X)?
    X = -28
    X = 71
    X = 40
    X = 65
    45s
  • Q4
    Given z = 2.50, μ = 23, σ = 2, what is the value of the normal random variable (X)?
    X = 55.50
    X = 59.50
    X = - 18
    X = 28
    45s
  • Q5
    Given X = 35, μ = 45, σ = 5, compute for the z-score.
    z = 0.67
    X = - 0.67
    z = 2.00
    z = - 2.00
    45s
  • Q6
    Given X = 54, μ = 60, σ = 10, compute for the z-score.
    z = 0.73
    z = 0.60
    z = - 0.60
    X = - 0.73
    45s
  • Q7
    Express this statement in Probability Notation: The probability that the z-score is below z = 2.36.
    P (z < 2.36)
    P (z = 2.36)
    P (z > 2.36
    P (0 < z < 2.36)
    30s
  • Q8
    Find the area at least z = -1.55.
    P (z>-1.55) = 0.0606
    P (z>-1.55) = 0.4394
    P (z>-1.55) = 0.9394
    P (z>-1.55) = - 0.0606
    60s
  • Q9
    Find the area at most z = 2.01.
    P (z<2.01) = 0.0222
    P (z<2.01) = 0.5222
    P (z<2.01) = 0.4778
    P (z<2.01) = 0.9778
    60s
  • Q10
    Express this statement in Probability Notation: The probability that the z-score is between -1.43 & -3.01.
    P (z = 2.36)
    P (-3.01 < z < -1.43)
    P (z > 2.36
    P (0 < z < 2.36)
    30s

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