b) How many total firstborn babies were there? (Enter your answer rounded to the nearest whole number.) firstborn babies: (c) By hand, make a histogram and using this histogram select the correct description of the age at which women have their first child. The distribution is: (d) In which age classes do the median and quartiles fall in the ordered list of all maternal ages? Median falls within: Q1 falls within: Q3 falls within:
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
![(a) For comparison with other years and with other countries, we prefer
a histogram of the percents in each age class. A histogram of the percents in each age class is best to use for
comparison with other years and other countries because a histogram can only be made using percents.
O a histogram of the percents in each age class. A histogram of the percents in each age class is best to use for
comparison with other years and other countries because if different years and countries have very different
numbers of babies born, the distributions across age group will be difficult to compare because the scale will be
determined by the larger counts.
O a histogram of the counts in each age class. A histogram of the counts in each age class is best to use for comparison
with other years and other countries because if different years and countries have very different percentages of
babies born, the distributions across age group will be difficult to compare because the scale will be determined by
the larger percentages.
O a histogram of the counts in each age class. A histogram of the counts in each age class is best to use for comparison
with other years and other countries because a histogram can only be made using counts.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff77a0880-874e-4103-b42e-ddb1f97e93ef%2F2e52fda2-a8ec-49c7-9682-ef519c5c6b06%2Fwdcyx7n_processed.png&w=3840&q=75)
![How old are women when they have their first child? The table displays the distribution of the age of the mother for all
firstborn children in the United States in 2014.
Age
Count
10 to 14 years
2,769
15 to 19 years
205,747
20 to 24 years
445,523
25 to 29 years
428,762
30 to 34 years
326,391
35 to 39 years
114,972
40 to 44 years
23,941
45 to 49 years
2,169
The number of firstborn children to mothers under 10 or over 50 years of age represent a negligible percentage of all first
births and are not included in the table.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff77a0880-874e-4103-b42e-ddb1f97e93ef%2F2e52fda2-a8ec-49c7-9682-ef519c5c6b06%2Fvv4kfdo_processed.png&w=3840&q=75)
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