Do store-brand chocolate chip cookies have fewer chocolate chips per cookie than

Question

Do store-brand chocolate chip cookies have fewer chocolate chips per cookie than Keebler's Chips Deluxe Chocolate Chip cookies? To test this, a student randomly selected 21 cookies of each brand and counted number of c per cookie. The results are summarized below 8. hips No. of chips per cookie Keebler 32 23 28 28 28 29 25 20 25 22 21 5 24 21 24 21 26 28 24 33 20 31 Store brand 21 23 24 24 25 27 26 26 21 18 16 LCO 2421 30 17 23 28 31 27 33 29 a) Calculate the basic statistics for both brands. b) Draw a side-by-side Box plots. Show your intermediate steps c) Write the five number summary for each set Calculate basic (trimmed) statistics after trimming three observations from the left and right le. (14.285714% trimmed). X d) 2x 514 x2 -1288 x-533 Sx 3557 6x-3. x 44D3 miny l minx-20 01 21.5 Med = 25 Q11 Med 24 03 27.S moxX 33 maxX 33 mins 20 Q1 215225 323 Max: 33

Explanation / Answer

d)

To calculate basic statistics after trimming three observations from left and right

In this case you have to first arrange the data in ascending order

For ex. Keebler data is

32 23 28 28 28 29 25 20 25 22 21 24 21 24 21 26 28 24 33 20 31

Arrange it in ascending order we get

20 20 21 21 21 22 23 24 24 24 25 25 26 28 28 28 28 29 31 32 33

Now trim 3 values from left and 3 from right, we are left with

21 21 22 23 24 24 24 25 25 26 28 28 28 28 29

Calculate all statistical parameters for new dataset

Perform similar logic for other dataset and obtain values

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