Complete the partial ANOVA table. Is the corresponding p-value greater or less than 5%? Justify your response.
At what age do babies learn to crawl? Does it take longer to learn in the winter when babies are often bundled in clothes that restrict their movement? Data were collected from parents who brought their babies into the University of Denver Infant Study Center to participate in one of a number of experiments between 1988 and 1991. Parents reported the birth month and the age at which their child was first able to creep or crawl a distance of four feet within one minute. The resulting data were grouped by month of birth. The data are for January, May, and September
Average
Birth month crawling age SD n
January 29.84 7.08 32
May 28.58 8.07 27
September 33.83 6.93 38
Crawling age is given in weeks. Assume the data come from three independent simple random samples, one from each of the three populations (babies born in a particular month) and that the populations of crawling ages have
Analysis of Variance for crawling age
Source df Sums of squares Mean square F-ratio
Birth month XX 505.26 XXXXXX XXXX
Error XX XXXXXX XXXXXX
Total XX 5529.56
Note the following: F2,94,0.05 = 3.09.
-Complete the partial ANOVA table. Is the corresponding p-value greater or less than 5%? Justify your response. (Note that this question is not asking you to write out all steps of the test…just answer the question and justify your response.)
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