Question

The following data are 40 measurements of head width (biparietal diameters, in mm) of fetuses in a sample of pregnant women infected with the Zika virus. The measurements were obtained using ultrasound at 33 to 36 weeks of gestational age at a clinic in Rio de Janeiro, Brazil.

61 69 70 80 80 80 81 82 82 82 82

83 84 84 84 84 85 85 85 85 85 85

85 85 86 86 86 86 87 87 87 88 88

89 89 89 90 90 90 92

1. Create a table that shows head width ranges (mm) and Frequency (number of fetuses). Show your calculation in determining the range and the number of ranges (bins).
2. Based on the table, create a histogram to present the data properly. Mind the width and number of the bins. Not too many, not too few.
3. Describe the entire histogram in scientific words, assuming the graph is not available to your audience (a group graduate students in Statistics major). Try to describe the shape, mode, skewness, outliers, general trend, uniqueness, etc.

Answer 1