HIUS 222 EXAM 1 EXAMPREP 2026 COMPLETE
QUESTIONS AND ANSWERS ALREADY PASSED
◉ Sampling can be done...
Answer: With or without replacement
◉ Benefits of Simple Random Sampling
Answer: -DOES remove selection bias from sample
-DOES NOT affect the natural variability of data
-DOES NOT guarantee a representative sample
◉ Quantitative Data
Answer: -Data that are numerical and allow the use of arithmetic
operations
-discreet and continuous data
◉ Observational Study
Answer: -A study that measures a characteristic in a sample
WITHOUT controlling the experimental units or the treatment
-Ex post study (after the fact) because the value of the characteristic
had already been established
-Can determine association but not causation
,-Ex. Height of students in a class
◉ Experimental Design
Answer: -A study that measures a characteristic in a sample WITH
controlling the experimental units or the treatment
-Ex. Weight gain of three females v. males while on high protein diet
for one week
◉ Response Variable
Answer: -A quantitative or qualitative variable that reflects the
characteristic of interest
◉ Relative Frequency
Answer: -The percent, or proportion, of data in each category
-Frequency/sum of all frequencies
◉ Cumulative Frequency
Answer: -The sum of frequency up through, and including, the
category of interest
-The number of observations less than or equal to the category value
◉ Histogram
, Answer: -A graph of a set of data made the same way as a bar chart
except
-The rectangles DO touch
-The value of each class is marked at the middle of each rectangle
◉ Histogram (Continuous Data)
Answer: -A graph of a set of data made the same way as a bar chart
except:
-The rectangles DO touch
-The value of each class is marked at the left side of each rectangle
◉ Stem-and-Leaf Plot
Answer: -A graph to summarize continuous data by dividing each
data point into a stem part and a leaf part and listing these parts
-Is a histogram turned sideways with the data values listed instead
of bars to show frequency
◉ Skewed Right
Answer: -The tail of the chart is on the right side of the peak
◉ Skewed Left
Answer: -The tail of the chart is on the left side of the peak
QUESTIONS AND ANSWERS ALREADY PASSED
◉ Sampling can be done...
Answer: With or without replacement
◉ Benefits of Simple Random Sampling
Answer: -DOES remove selection bias from sample
-DOES NOT affect the natural variability of data
-DOES NOT guarantee a representative sample
◉ Quantitative Data
Answer: -Data that are numerical and allow the use of arithmetic
operations
-discreet and continuous data
◉ Observational Study
Answer: -A study that measures a characteristic in a sample
WITHOUT controlling the experimental units or the treatment
-Ex post study (after the fact) because the value of the characteristic
had already been established
-Can determine association but not causation
,-Ex. Height of students in a class
◉ Experimental Design
Answer: -A study that measures a characteristic in a sample WITH
controlling the experimental units or the treatment
-Ex. Weight gain of three females v. males while on high protein diet
for one week
◉ Response Variable
Answer: -A quantitative or qualitative variable that reflects the
characteristic of interest
◉ Relative Frequency
Answer: -The percent, or proportion, of data in each category
-Frequency/sum of all frequencies
◉ Cumulative Frequency
Answer: -The sum of frequency up through, and including, the
category of interest
-The number of observations less than or equal to the category value
◉ Histogram
, Answer: -A graph of a set of data made the same way as a bar chart
except
-The rectangles DO touch
-The value of each class is marked at the middle of each rectangle
◉ Histogram (Continuous Data)
Answer: -A graph of a set of data made the same way as a bar chart
except:
-The rectangles DO touch
-The value of each class is marked at the left side of each rectangle
◉ Stem-and-Leaf Plot
Answer: -A graph to summarize continuous data by dividing each
data point into a stem part and a leaf part and listing these parts
-Is a histogram turned sideways with the data values listed instead
of bars to show frequency
◉ Skewed Right
Answer: -The tail of the chart is on the right side of the peak
◉ Skewed Left
Answer: -The tail of the chart is on the left side of the peak
