mode 4 practice 1

Which of the following are best used to display categorical data? a) Histogram b) Dot Plot c) Pie Chart d) Stem Plot

The correct answer is c. A pie chart is used to display categorical data. All of the other choices are used to display quantitative data.

Stem plots display which type of data? a) Quantitative b) Categorical c) Neither Quantitative nor categorical d) Quantitative and categorical

Quantitative Stem plots display quantitative data.

It is important to start the frequency scale on a bar chart at which value to be certain not to overemphasize a difference in values? a) Zero b) The lowest measured value c) The smallest frequency d) As long as the scale is even, it doesn't matter where you start it.

The correct answer is a. A vertical scale that does not start at zero can exaggerate the differences in a data set.

When observing a box plot, what percentage of the measured data lies between Q1 and the maximum value in the list? Correct Answer Checked a) 75% b) 50% c) 25% d) Cannot determine.

The correct answer is a. Twenty-five percent of the data is to the left of Q1, so that leaves 75% to the right

Determine the interquartile range (IQR) for the following set of resting pulse rates.{60,47,65,85,81,77,70,56,47,84,75} a) 25 b) 57 d) 80

k: The correct answer is a. IQR = Q3 - Q1. {47, 47, 56, 60, 65, 70, 75, 77, 81, 84, 85}. Q1 = 56. Q3 = 81. 81 - 56 = 25.

Determine Q3 for the sorted list of patient ages. {3,8,8,10,16,20,20,23,27,37,44,45,62,71} a) 27 b) 37 c) 44 d) 45

The correct answer is c. There are 14 data points so Q2 falls between 20 and 23. The upper half of the data includes the following 7 data points: 23,27,37,44,45,62,71. Therefore, Q3 = 44

You ask your patients to determine the number of grams of protein they consume for a particular meal. Which of the following would be the best choice to illustrate the shape of the data you collect? a) Bar chart b) Pie Chart c) Box plot d) None of the above

The correct answer is c. As the data you are collecting is quantitative data, from the choices below a box plot would be your best choice to illustrate the shape of the data.

Of the following sets of data, which would you assume should have the greatest range? a) Age when a baby gets their first tooth. b) Age of first-year medical students c Age of death. d) Age of patient getting an appendectomy.

The correct answer is c. Death can happen at any age, therefore this choice would have the greatest range. The other answer choices have narrower ranges when it comes to age.

Determine any outliers in the following data set. {1,24,26,28,32,36,38,40,65} a) 1 b) 65 c) A and B d) None

The correct answer is c. Q1 = 25, Q3 = 39. IQR = Q3 - Q1 = 14. Using the 1.5 IQR Criterion Rule, outliers would be less than Q1 - 1.5IQR = 25 - 1.5(14) = 4, or greater than Q3 + 1.5IQR = 39 + 1.5(14) = 60. Since 1 is less than 4 and since 65 is more than 60, these two values (1 and 65) are outliers by definition.

Use the bar graph to answer the following question. Determine the best estimate for the total number of ice creams sold on Monday and Tuesday. Bar a) 100 b) 112 c) 137 d) 148

The correct answer is c. The best answer is between 135 and 140.

Which of the four different sets of numbers would have the greatest standard deviation? a) 5,5,5,5,5 b) 5,6,7,8,9 c) 1,8,16,25,33 d) 40,43,45,47

The correct answer is c. The values in this list are far more spread out than the values in the other lists.

Determine the range for the following data set. {1,24,26,28,32,36,38,40,65} a) 1 to 65 b) 64 c) 65 d) Cannot determine

The correct answer is b. Range is equal to the difference between the minimum and maximum value in a given measurable set. The maximum value of this set is 65. The minimum value is 1. Therefore, range for this data set is 64.

Determine the median for the following set of resting pulse rates.{60,47,65,85,81,77,70,56,47,84,75} a) 67 b) 70 c) 47 d) 67.9

The correct answer is b. The median is the middle value if the list is sorted. {47, 47, 56, 60, 65, 70, 75, 77, 81, 84, 85}.

Use the pie chart to answer the following question. If 200 people are surveyed, how many claim to have had no exercise? a) 18 b) 36 c) 72 d) Cannot determine

The correct answer is c. 200 x 0.36 = 72.

Please use the dot plot below to answer the following question. Determine the median for the data. a) 7 b) 7.5 c) 8 d) Cannot determine.

The correct answer is c. 8 Ordering the data set yields the following:5, 6, 6, 7, 8, 8, 8, 9, 9, 10. There are 10 data points in the data set. The median is the "halfway" point of a set of values. This point falls between the fifth and sixth data point in this data set. The value of both of these points is 8. Therefore, the median value is 8.

Body fat percentage in a sample population ranged from 8% to 23%. What percentage of the sample will fall within 1 standard deviation above the mean? Assume the data is normally distributed. a) 47.5% b) 13.5% c) 68% d) 34

The correct answer is d. The Standard Deviation Rule says that 68% of the values will fall within 1 standard deviation of the mean. Since we are looking for the percentage that will fall 1 standard deviation above the mean, we divide this value in half. Therefore, the answer is 34%.

Arrange the mean, median, and mode in order from least to greatest in a distribution that it is positively skewed. a) Median, mode, mean b) Mean, median, mode c) Mean, mode, median d) Mode, median, mean

The correct answer is d. The median will always remain in the middle for skewed data, and the mean goes towards the skew. The mode goes in the opposite direction of the skew.

Cholesterol levels in a sample population ranged from 177 mg/dL to 231mg/dL. What percentage of adults will fall within 2 standard deviations of the mean? Assume the data is normally distributed. a) 34% b) 68% c) 95% d) 99.7%

The correct answer is c. 95 The Standard Deviation Rule says that 95% of the values will fall within 2 standard deviations of the mean.

What is the most significant difference between histograms and bar charts? a) The number of bars used b) The use of labels on the axes c) The type of data depicted in the graph d) The coloring used for each bar

The correct answer is c. A bar chart measures categorical data. A histogram displays quantitative data.