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QMB3250 EXAM 1 QUESTIONS WITH CORRECT ANSWERS
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QMB3250 EXAM 1 QUESTIONS WITH CORRECT ANSWERS
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QMB3250 EXAM 1 QUESTIONS WITHCORRECT ANSWERS
Graphs for 1 Categorical Variable - ANSWER: ➡ Pie Charts and Bar Charts
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2 Categorical Variables - ANSWER: ➡ Contingency Table
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Graph for 1 Quantitative Variable - ANSWER: ➡ Histograms, Dot Plots, Stem and Leaf Plots,
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Box Plot
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Graphs for 2 Quantitative Variables - ANSWER: ➡ Scatterplot
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Graphs for 1 Quantitative Variable with Multiple Categories - ANSWER: ➡ Boxplots
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Residual - ANSWER: ➡ residual = observed value - predicted value
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Correlation Coefficient - ANSWER: ➡ a statistical index of the relationship between two things
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(from -1 to +1); can be found by taking the square root of r-squared and then determine sign
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from graph
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JMP Standard Deviation - ANSWER: ➡ File -- New -- Data Table -- Insert Data -- Analyze --
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Distribution -- Drag Column Required -- Stack (Small tab next to Distribution)
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Find Test Statistic for Significance Test - ANSWER: ➡ Enter two columns of data -- Analyze --
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Specialized Modeling -- Matched Pairs -- Drag each column into Y, Paired Response -- OK -- t-
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Ratio ** o
, What value of t would you use for 95% confidence interval for μd? - ANSWER: ➡ Help --
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Sample Data -- Teaching Scripts -- Interactive Teaching Modules -- Distribution Calculator --
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Central Probability -- Probability: 0.95
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Skewed Right - ANSWER: ➡ mean > median
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Normal/Symmetric - ANSWER: ➡ mean = median o o oo o o o
Skewed Left - ANSWER: ➡ mean < median
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One mean sample statistic symbol - ANSWER: ➡ ȳ
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One mean population parameter symbol - ANSWER: ➡ μ
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Two sample means: independent samples; sample statistic symbol - ANSWER: ➡ ȳ1 - ȳ2
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Two sample means: independent samples; population parameter symbol - ANSWER: ➡ μ1 -
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μ2
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Two sample means: matched pairs; sample statistic symbol - ANSWER: ➡ ȳd
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Two sample means: matched pairs; population parameter symbol - ANSWER: ➡ μd
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One proportion; sample statistic symbol - ANSWER: ➡ p̂
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One proportion; population parameter symbol - ANSWER: ➡ p
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Two independent proportions sample statistic - ANSWER: ➡ p̂ 1 - p̂ 2
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