STA1501 ASSIGNMENT 01 OF 2025 EXPECTED ANSWERS

SOLUTIONS




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for FAC MAC ECS DSC TAX QMI FIN INV BNU STA tutorials

, QUESTION 1
Statement: The lecturer will use the number of enrolled students as a population because it is difficult to
locate every student.
Answer: False (The enrolled students are a sample, not the entire population.)

QUESTION 2
Statement: The cumulative frequency for the given soccer player data is correctly calculated.
Answer: True (Calculations match: Gauteng=100, Western Cape=550, etc.)

QUESTION 3
Statement: The scale of measurement for service ratings (1-5) is a discrete variable.
Answer: True (Ratings are whole numbers, making them discrete.)

QUESTION 4
Statement: Approximately 67% of students passed the exam (marks ≥ 50%).
Answer: False (Only 9/15 passed = 60%, not 67%.)
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QUESTION 5 TUTOR
Statement: The frequency for the class "10 to less than 20" is 49. oscardiura@g
Answer: True (97 cumulative − 48 prior = 49.) mail.com
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QUESTION 6 for FAC MAC
ECS DSC
Statement: The predicted y-value when x =1 is −4.20.
TAX QMI FIN
Answer: False (y = 34.68 − 4.20(1) = 30.48, not −4.20.) INV BNU STA
tutorials
QUESTION 7
Statement: The distribution of times students fell in love before age 11 tails to the right.
Answer: True (Right-skewed due to outliers like 6 and 9.)

QUESTION 8
Statement: The variance of Y (Sy2 ) is 34.6 given r = 0.85, Sxy = 15, and Sx = 3.
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Answer: False (Correct Sy2 = 34.6 requires Sy = 5.88, but calculation yields Sy2 ≈ 34.6. Accept True if
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assuming rounding.)

QUESTION 9
Statement: The given graphical representation is a bar chart.
Answer: False (It’s a histogram; bars represent continuous intervals.)