Lab 2 Answer key

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University of Ottawa *

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3101

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Statistics

Date

Feb 20, 2024

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QUESTION 1: Repeat the above steps to generate a frequency table for the variable mage35 (Note: this is different from the variable mage). Copy the frequency table into a Word document and write a sentence describing the proportion of mothers over the age 35, excluding those with missing values. Note: Refer to the data dictionary at the top of this document to interpret the values in your frequency table. 10.5% of mothers in this sample were over the age of 35 years. QUESTION 2: Provide an image of the frequency table and a sentence interpreting these results. 11.9% of the sample of babies were born preterm. 1

QUESTION 3: Repeat the steps above to create a bar graph for maternal age 35 (mage35). Include individuals will missing values in your graph. Provide an image of your graph. QUESTION 4: Generate a table of descriptive statistics (mean, min, max and number of cases) for the following variables in this order: gestation, birthweight, length, headcirc. Provide an image of your table along with a few sentences describing these descriptive statistics. Descriptive Statistics N Minimum Maximum Mean Std. Deviation Gestation 42 33 45 39.19 2.643 Birthweight 42 1.92 4.57 3.3129 .60390 Length 42 43 58 51.33 2.936 Headcirc 42 30 39 34.60 2.400 Valid N (listwise) 42 Students should include a few sentences stating the means and standard deviations for each of the variables listed above. They may also present min and max and indicate that there were no missing values. 2

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