US far nlversityfenuhythe r of Data, 2e, Cu PLUS Course Statistlical (STA296) NE

Question

US far nlversityfenuhythe r of Data, 2e, Cu PLUS Course Statistlical (STA296) NEXT Ants on a Sandwich How many ants will climb on a piece of a peanut butter sandwich left on the ground near an ant hill? To study this, a student in Australia left a plece Table 1. (In fact, he also conducted an experiment to see if there is a difference in number of ants based on the sandwich filling.) for several minutes, then covered it with a jar and counted the number of ants. He did this eight times, and the results are shown in Number of ants 43 59 22 25 36 47 19 21 Table 1 Number of ants on a sandwich to What Is the Use of Experiments Conducted by Statistics Students? Journal of Statistics Education, 1994, http://www.amstat.org/publications/jse/v2n1/m htm (a) Find the mean and standard deviation of the sample. Round your answer for the mean to one decimal place and the answer for the standard deviation to two decimal places 34 13.68 Standard deviation

Explanation / Answer

#a)

d=c(43,59,22,25,36,47,19,21)

> d

[1] 43 59 22 25 36 47 19 21

> mean(d)

[1] 34

> sd(d)

[1] 14.62874

>Result: mean is 34 and standard deviation is 14.63

#d)

Here in question want confidence interval for parameters in part b).

Which is not provided in question.

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