Question

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Human measurements provide a rich area of application for statistical methods. In a longitudinal study the development of elementary school children explored the relationship between 1Q and private speech. Private speech is considered to be when children talk to themselves. It was thought that private speech would be related to 1Q, because 1Q is supposed to measure mental maturity, and it was known that private speech decreases as,students progress through the primary grades. The study included 34 students whose first-grade 1Q scores are given below " Use the R code to calculate the sample summary statistics, histogram and boxplot. # Can copy and paste directly to R script. 1Q data c(73, 87, 99, 102, 103, 103, 104. 105, 105, 105, 106, 106, 109, 109, 111, 111, 113, 113. 113, 114. 115, 115, 118, 118 125, 125, 126, 127, 127, 132, 136, 140, 140, 54) summary(tQ data) sd(TQ data) hist(1Q.data) boxplot(1Q. data, horizontal TRUE) Enter the values for the mean, standard deviation and five number summary. Round your answers to 1 deoimal place Hean Minimum Q1 Median 03 Maximum

Answer 1

Mean = 114.4, s = 15.6.

Minimum = 73.0, Q1 = 105.0, Median = 113.0, Q3 = 125.0, Maximum = 154.0

The options which are correct are -> 2, 4, 5, 8 and 12.