C784 Pre-Assessment Guide

C784 Pre-Assessment Guide

Name

 Western Governors University

C784 Applied Healthcare Statistics

Prof. Name

Date

1. Given the following set of numbers: 3.3, –2.3, –16, 25

What are the square roots of the whole number?

• ± 2.3
• ± 3.3
• ± 5.0
• ± 4.0

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2. Given the following set of numbers: 10, 2.5, –4, –4.5, 5

What is the sum when adding together only the whole numbers?

• 5.5
• 11.0
• 12.5
• 15.0

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3. Given the following expression: 4 + 7 × (6 – 3)²

What is the answer using proper order of operations?

• 25
• 67
• 46
• 99

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4. Given the following expression: 5 × (30 – 27)² + 4

What is the correct answer using the proper order of operations?

• 49
• 34
• 65
• 81

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5. What is the greatest common factor of 132 and the square root of 121 using prime factorization?

• 1
• 2
• 10
• 11

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6. What is the greatest common factor of 24 and 84 using prime factorization?

• 2
• 4
• 12
• 8

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9. A patient’s protein intake for today has been 15.76 g, 8.49 g, and 22.58 g.

What is the total protein intake rounded to the nearest tenth of a decimal?

• 46.5 g
• 46.8 g
• 46.9 g
• 47.0 g

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10. Given the equation: (not fully shown)

What is the solution rounded to the nearest thousandth?

• 0.03675
• 0.0368
• 0.368
• 0.037

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11. An intravenous drip is infused at a rate of 4.5 milliliters per minute.

How many milliliters are infused per hour?

• 0.075 mL
• 2.700 mL
• 270.000 mL
• 75.000 mL

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12. A patient’s medication was increased by 40 milligrams.

What is the percent increase if the original medication was 180 milligrams?

• 2.2%
• 4.5%
• 22.2%
• 45.0%

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13. What is the Fahrenheit equivalent for a patient’s room that needs to be kept at 25 degrees Celsius?

• 70°
• 77°
• 75°
• 80°

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14. What is the Celsius equivalent for a patient who is running a fever of 102 degrees Fahrenheit?

• 37.9°C
• 38.9°C
• 39.9°C
• 40.9°C

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15. What is the value of x in this equation? 2x + 3 = 13

• 5
• 10
• 76
• 106

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24. A survey asked residents to rate their community hospital on a scale of 1 to 10, with 10 being the most happy with the hospital services. The data shows a positively skewed distribution. How are the mean, median and mode related?

• Mode < Median < Mean
• Mean < Median < Mode
• Mean < Mode < Median
• Median < Mode < Mean

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25. An intensive care unit patient has frequent systolic blood pressure measures: 140, 150, 154, 154, 170, 176, 180

What is the mode?

• 140.00
• 154.00
• 160.57
• 170.00

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26. Given data collected from research on cancer patients, what is the skew of the distribution?

• Normal
• Bimodal
• Skewed right
• Skewed left

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27. Given this chart, what is true about the shape of the distribution?

• The distribution is positively skewed.
• The distribution is negatively skewed.
• The distribution is symmetric.
• The distribution is bimodal.

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28. Given the pie chart with CCU, pediatric, surgery, and NICU, which percentage of patients acquired an infection in the surgery department?

• 16%
• 18%
• 24%
• 42%

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29. The following weights were recorded for children: 93, 84, 70, 48, 59, 66, 88, 94, 84, 67, 74, 58, 82

Which method of display should be used to see the distribution and individual values?

• Box plot
• Stem plot
• Bar chart
• Pie chart

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30. Heart rates recorded: 98, 88, 74, 83, 76, 99, 81, 73, 60, 66, 88, 94

Which display is appropriate to see exact values of individual observations?

• Stem plot
• Pie chart
• Bar chart
• Histogram

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31. Hours of overtime worked by nurses: 3, 7, 2, 4

What should be used to display the data?

• Box plot
• Stem plot
• Bar chart
• Histogram

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32. Given a pie chart showing percentages of hepatitis A, B, and C:

What causes this information to be misleading?

• Hepatitis B should be bigger in size.
• Hepatitis B should be smaller in size.
• The percentages add up to more than 100%.
• The percentages add up to less than 100%.

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33. A clinic claims a dramatic increase in vaccines given over two years.

How is the clinic misrepresenting data?

• By starting the vertical axis at 10
• By showing only two years of data
• By ending the vertical axis at 30
• By creating a positive skew

C784 Pre-Assessment Guide

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34. Which conclusion can be drawn from this distribution?

• The distribution is positively skewed
• The distribution is negatively skewed
• The distribution is bimodal
• The distribution is symmetric

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35. A study on the relationship between gender and exercise type.

Which type of classification is this?

• Categorical to categorical
• Categorical to quantitative
• Quantitative to quantitative
• Quantitative to categorical

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36. A study on the relationship between age and diastolic blood pressure.

Which type of classification is this?

• Categorical to categorical
• Quantitative to categorical
• Categorical to quantitative
• Quantitative to quantitative

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37. A study on a categorical variable and a quantitative variable.

Which graphical display is appropriate?

• Scatterplot
• Two-way table
• Decision table
• Side-by-side box plot

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38. Study on blood pressure among sleep apnea patients using CPAP and those who do not.

Which numerical measure is appropriate?

• Regression analysis
• Five-number summary
• Correlation coefficient
• Conditional percentages

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39. Study on gender and hypertension.

Which numerical measure is appropriate?

• Regression analysis
• Five-number summary
• Correlation coefficient
• Conditional percentages

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40. Study on blood pressure and hemoglobin A1c.

Which numerical measure is appropriate?

• Standard deviation
• Five-number summary
• Correlation coefficient
• Conditional percentages

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41. Physician collects retrospective data on smoking and lung cancer.

Which data indicate the relationship?

• Smokers are more likely than nonsmokers to have lung cancer because 77% is greater than 22%.
• Nonsmokers are less likely because 78% is greater than 77%.
• Nonsmokers are less likely because 23% is less than 77%.
• Smokers are more likely because 23% is greater than 22%.

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42. Study comparing surgery survival rates at two hospitals.

What is true about the relationship?

• Hospital B has a higher survival rate because 98% is higher than 97%.
• Hospital A has a higher survival rate because 3% is higher than 2%.
• Hospital A has a higher survival rate because 97% is higher than 3%.
• Hospital B has a higher survival rate because 98% is higher than 2%.

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43. Study on physician attire preference by setting.

What is true about patient preference?

• Patients prefer formal clothes and white coat because 67% > 17%.
• Patients prefer scrubs because 65% > 17%.
• Patients do not prefer scrubs because 7% < 9%.
• Patients do not prefer scrubs instead of formal clothes because 65% < 67%.

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44. Given a scatterplot:

What accurately describes the distribution and relationship?

• Weak, no relationship
• Strong, linear relationship
• Weak, linear relationship
• Strong, no relationship

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45. Given a scatterplot:

What accurately describes the distribution and relationship?

• Weak, linear relationship
• Strong, linear relationship
• Weak, nonlinear relationship
• Strong, nonlinear relationship

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46. Given a scatterplot with an outlier:

How does the outlier impact the relationship?

• It weakens the negative relationship.
• It weakens the positive relationship.
• It strengthens the positive relationship.
• It strengthens the negative relationship.

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47. Given a scatterplot with an outlier:

What effect would removal of the outlier have?

• It would strengthen a positive relationship.
• It would weaken a positive relationship.
• It would weaken a negative relationship.
• It would strengthen a negative relationship.

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48. Given a scatterplot:

What number of work days missed contains an outlier?

• 3
• 5
• 8
• 10

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55. A pediatric practice has six physicians, four are male. A newborn patient is assigned randomly.

What is the probability assigned to a non-male physician?

• 0.17
• 0.33
• 0.50
• 0.67

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56. Given scatterplot & regression equation, what is the anxiety score for someone practicing yoga 3 hours per day, 2 days per week?

• 10
• 8
• 21
• 26

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57. Fair coin flipped again. Probability of heads?

• 0.17
• 0.2
• 0.25
• 0.5

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58. Surveyed 100 patients; preferences: 35 Infusions, 30 Incision/drainage, 25 Wound care, 10 Vital signs.

Relative frequency for wound care?

• 0.10
• 0.25
• 0.30
• 0.35

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59. Coin flipped 3 times, probability of exactly 2 heads?

• 0.250
• 0.375
• 0.500
• 0.875

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60. Box with red, purple, blue balls. Two draws without replacement. Probability red ball is second?

• 0.33
• 0.50
• 0.67
• 0.83

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61. Three pregnant women with one child each. Possible baby sex outcomes (M or F)?

• MMM, MMF, MFM, MFF, FMM, FMF, FFM, FFF

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62. Patient has elevated temperature 20%, high cholesterol 72%, both 14.4%. What’s true?

• The values are independent (0.2 × 0.72 = 0.144)

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63. Cold climates: 30% get influenza, 15% appendicitis. Probability of both (approximate)?

• 5%
• 15%
• 30%
• 45%

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64. Probability of running outside 0.45, joining gym 0.40, both 0.25. Probability either running or gym?

• 0.60
• 0.65
• 0.70
• 0.85

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65. 27 patients: 7 have diabetes, 9 have heart disease, 3 both.

How to find probability of diabetes or heart disease?

• P(D or H) = P(D) + P(H) − P(D and H) = (7/27) + (9/27) − (3/27)

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66. Clinic sees 8 patients/hour; probability patient has high BP = 0.63; probability none have high BP?

• (1 − 0.63)^8 = (0.37)^8

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67. 625 group physician practices: 300 primary care, 225 specialty care, 100 both.

Probability of primary or specialty?

• (300/625) + (225/625) − (100/625)

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68. 35% patients Medicare, 15% Medicaid; 10% of Medicare patients also have Medicaid.

Probability patient has both?

• 0.35 × 0.10 = 0.035

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69. 14% get Virus A, 18% Virus B, 10.62% both.

Probability that a person who contracts Virus B also contracts Virus A?

• P(A|B) = 0.1062 / 0.18 ≈ 0.59 or 59%

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70. 37% patients had sore throat, 36% itchy eyes, 51% of itchy eyes patients had sore throat.

Probability patient had both?

• 0.36 × 0.51 = 0.1836 or 18.36%