MATH 114 SEQUENCES AND SERIES
PROBLEM SOLVING PRACTICE TEST 2026
◉ Cumulative Frequency
Answer: For a class is the sum of the frequencies for that class and
all previous classes
◉ Stem-and-Leaf Plots
Answer: Method of exploratory data analysis that is used to rank-
order and arrange data into groups
◉ Mode
Answer: The most frequent number
◉ Median
Answer: • Middle Number
• Subtract the two and divide by 2
◉ Median in Large Data Sets
Answer: (n+1)÷2 = The position of the median
◉ Mean
, Answer: Sum of all entries ÷ Number of entries
◉ Range
Answer: Largest value - Smallest value
◉ Coefficient of Variance
Answer: (S÷Mean) • 100
(Population Standard Deviation ÷ Population Mean) • 100
◉ How to Compute Quartiles
Answer: 1. Order from smallest to largest
2. Find the median (Q2)
3. The first quartile is then the median of the lower half of data
3. The third quartile is the median of the upper half of the data
◉ Box-And-Whisker Plot
Answer:
◉ Properties of a Normal Curve
Answer: • The curve is bell-shaped, with the highest point at µ
• The curve is symmetrical about a vehicle line through µ
PROBLEM SOLVING PRACTICE TEST 2026
◉ Cumulative Frequency
Answer: For a class is the sum of the frequencies for that class and
all previous classes
◉ Stem-and-Leaf Plots
Answer: Method of exploratory data analysis that is used to rank-
order and arrange data into groups
◉ Mode
Answer: The most frequent number
◉ Median
Answer: • Middle Number
• Subtract the two and divide by 2
◉ Median in Large Data Sets
Answer: (n+1)÷2 = The position of the median
◉ Mean
, Answer: Sum of all entries ÷ Number of entries
◉ Range
Answer: Largest value - Smallest value
◉ Coefficient of Variance
Answer: (S÷Mean) • 100
(Population Standard Deviation ÷ Population Mean) • 100
◉ How to Compute Quartiles
Answer: 1. Order from smallest to largest
2. Find the median (Q2)
3. The first quartile is then the median of the lower half of data
3. The third quartile is the median of the upper half of the data
◉ Box-And-Whisker Plot
Answer:
◉ Properties of a Normal Curve
Answer: • The curve is bell-shaped, with the highest point at µ
• The curve is symmetrical about a vehicle line through µ
