A survey from the Gallup organization asked, "What do you think is the ideal number of children for a family to have?" Go to www.pearsonhighered.com/sullivanstats to obtain the data file 10_5_21 using the file format of your choice for the version of the text you are using to get the survey results.
(a) Draw a dot plot of the data. Comment on the shape of the distribution.
(b) What is the mode ideal number of children?
(c) Determine the mean, median, standard deviation, and interquartile range ideal number of
children. Round your answers to the nearest thousandth.
(d) Explain why a large sample size is needed to perform any inference regarding this
population.
(e) In May 1997, the ideal number of children was considered to be 2.64. Do the results of this
poll indicate that people's beliefs as to the ideal number of children have changed? Use the 0.05
level of significance.