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# STA 201 CASE study Chest size

п»їChapter 6 Example: Chest scale Scottish Militiamen p. 295

a.

Chest size (in)

Regularity

Relative Regularity

33

three or more

0. 000523

34

19

0. 003315

35

81

0. 014131

36

189

0. 032973

37

409

0. 071354

38

753

0. 131368

39

1062

0. 185276

40

1082

0. 188765

41

935

0. 163119

42

646

0. 112701

43

313

0. 054606

44

168

0. 029309

45

50

0. 008723

46

18

0. 003140

47

three or more

0. 000523

48

one particular

0. 000174

5732

one particular

b.

(Ој=39. 85, Пѓ=2. 07)

The standard curve may be the one whose parameters are identical as the mean and standard deviation variable, which can be 39. 85 and installment payments on your 07, correspondingly. Thus the mandatory normal competition has parameters Ој=39. eighty five and Пѓ=2. 07.

c.

Chest size (in)

Consistency

Relative Frequency

33

three or more

0. 000523

34

nineteen

0. 003315

35

seventy eight

0. 014131

36

189

0. 032973

37

409

0. 071354

38

753

0. 131368

39

1062

0. 185276

40

1082

0. 188765

41

935

0. 163119

42

646

0. 112701

43

313

0. 054606

44

168

0. 029309

45

55

0. 008723

46

18

0. 003140

47

a few

0. 000523

48

1

0. 000174

5732

1

Utilizing saving money highlighted section above, the following was computed: 189+409+753+1062+1082+935 means 4430.

4430 is divided simply by 5732 to equal zero. 7728. The percentage of militiamen in the review with upper body circumference between 36 and 41 ins is 77. 28%.

d.

z sama dengan

unces =

= -2. 10

z . =

= 0. 80

Table II was used to find the area under the standard usual curve. The spot to the left of -2. 15 is zero. 0179. The location to the left of 0. 85 is 0. 7881. The location under the common normal competition that is between -2. 10 and 0. seventy nine is zero. 7881 -- 0. 0179 = 0. 7702. A great approximation for the percentage of militiamen in the survey with chest area between thirty-five. 5 and 41. a few inches is definitely 77. 02%. In comparing the percentage of 77. 02%militiamen in the review to 77. 28% seen in part c, both percentages are close and equally can round to 77%.