MMGT6012 - Practice Final Exam - MC Answers

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PRACTICE EXAM Page 2 Section A. Multiple Choice Questions (20 questions worth 2 marks each). Circle the correct answer. 1. What is a type I error? a. Not rejecting the null when the null is false b. Rejecting the null when the null is false c. Rejecting the null when the null is true d. Not rejecting the alternative when the alternative is false e. None of the above 2. A real estate agent sells a house for $520,000, but on average houses, in the area sell for $845,000 with a standard deviation of $220,000. What is the standardised (Z) score for the sale price of the house? a. 1.877 b. 1.477 c. -1.877 d. -1.477 e. None of the above 3. For children between the ages of 18 months and 29 months, there is approximately a linear relationship between “height” and “age”. The relationship can be represented by: Y = 64.93 + 0.63(x), where Y represents height (in centimetres) and X represents age (in months). Joseph is 22.5 months old and is 80 centimetres tall. What is Joseph’s residual? a. 79.1 b. -0.9 c. +0.9 d. 56.6 e. 64.93 4. For children, there is approximately a linear relationship between “height” and “age”. One child was measured monthly. Her height was 75 cm at 3 years of age and 85 cm when she was measured 18 months later. A line was fit to her data. The slope of this line is approximately: a. 0.55 cm/month b. 10 cm/month c. 25 cm/month d. 1.57 cm/month e. 2.1 cm/month 5. Preference for mode of transport (where commuters are required to place car, bus and train in order of most preferred to least preferred) is an example of what kind of data? a. Nominal b. Normal c. Ratio d. Ordinal e. Interval
PRACTICE EXAM Page 3 6. There is an approximate linear relationship between the height of females and their age (from 5 to 18 years) described by: height = 50.3 + 6.01(age) Where height is measured in cm and age in years. Which of the following is not correct? a. The estimated height of a child who is 10 years old is about 110 cm. b. The estimated intercept is 50.3 cm which implies that children reach this height when they are 50.3/6.01=8.4 years old. c. The average height of children when they are 5 years old is about 50% of the average height when they are 18 years old. d. My niece is about 8 years old and is about 115 cm tall. She is taller than average. e. On average, children between 5 and 18 grow 6.01 cm per year. 7. In hypothesis test, the null hypothesis is: a. Always false. b. A change from the accepted state. c. Never accepted. d. Results in something dying. e. Defines the current state of nature. 8. What is the standard deviation for the following number range? 4 41 11 17 7 47 10 16 17 32 36 a. 14.6 b. 14.8 c. 10.8 d. 11.1 e. None of the above 9. Which of the following are properties of ratio data? a. Additive b. Divisable c. Fixed zero point d. All of the above e. None of the above 10. Boxplots are useful in identifying? a. Intervals b. Medians c. Homoskedasticity d. Multicolinearity e. None of the above
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