HONORS STATISTICS

CH1

In an observational study, analysts simply watch characteristics and take measurements, as in an example survey.

In a designed experiment, researchers impose therapies and handles and then observe characteristics and take measurements.

Data from an example of citizens of a certain region yielded the next estimates of average TELEVISION SET viewing period per month for the citizens. Response: Inferential, since the statistics prefer make inference about the citizenry.

5. 50 children are divided into 2 organizations. One is exposed to a vid on intimidation. The different isn't. Following one week, both groups happen to be questioned of the attitudes about violence. This is certainly a designed experiment

a few state officials: Governor (G), Secretary of State (S), Attorney (A), Representative В®, Press (P) a) list 10 possible samples w/out replacement of size 2

b) if the simple unique sampling process is used to secure a sample of two representatives, what are the probabilities it's the initial sample?

GS, GA, GR, GP, SA, SR, SP, AR, AP, RP

1/10

CH 2

1 . According into a technology organization, 5 countries cost within a certain area. Identify kind of data: Rank| Country| Cost

1| Country a | $54

2| Country b| $332

3| Country c| $99

4| Country d| $98

5| Country e| $221

Solution:

Ranking: Quantitative, Under the radar

Country: Qualitative

Cost: Quantitative, Continuous

installment payments on your original info is data about order or list given on a scale including 1, a couple of, 3.. or maybe a, B, C, … will the following adjustable yield ordinal data?

Locks color

Simply no, because the data isn't bought in some way

three or more. For a examine, a student bought 3 hand bags of colored candy from stores and counted every color. The average number of each color inside the three hand bags was distributed as displayed.

Color| Frequency

Brown| 556

Yellow| 118

Red| 344

Orange| 57

Green| 87

Blue| 34

a) obtain a relative – consistency distribution

College| Frequency| Comparable frequency

Brownish | 157|. 296

Yellow| 118|. 223

red| 102|. 192

orange| 57|. 108

green| 48|. 091

blue| 48|. 091

a) RF = FN/(F1 + F2 + F3 + …. )

b) identify quiche chart ( has same percentages while relative freq) c) tavern chart ( not connected height combined relative freq. )

some. Questionaire with score effects:

37| 15| 44| 24| 16

22| 46| 53| 12| 52

31| 35| 43| 18| 53

38| 30| 44| 45| 46

21| 17| 44| 37| 35

a) determine consistency distribution:

Anxiety | Rate of recurrence

12-18| 5

19-25| three or more

26-32| two

33-39| a few

40-46| 7

47-53| 3

Grouping is given by one, group different ones like previously mentioned. Then PROPERLY tally them for the right line

b) obtain relative regularity:

Anxiety | Relative Frequency

12-18|. two

19-25|. doze

26-32|. '08

33-39|. a couple of

40-46|. 28

47-53|. doze

RF = FN / (F1+ F2 +F3…)

c) frequency histogram (connected, top point amount for frequency) d) compar freq. histogram (connected, maximum point number for rel. frequency)

your five. average elevation:

29. 5 28. some 29. you 27. two a) control + leaf 27 2 30. one particular 30. 1 29. 5 28. 5 28 several 4

29 you 2 5

40 1 1

B) stem + tea leaf (two lines per stem)

272

283 4

291 2

295

3011

(all numbers 0-4 on one range, 5-9 in another)

6/7. know shapes of distribution plus the skews

eight. know gradation of distribution, plan the control and tea leaf graph

CH3

1 . a) find the mean and median

c) replace one quantity with a bigger number and find the suggest and typical again (mean changes, median stays the same)

d) which middle of measure works better?

The median

2 . four cars cost $....

a) find the mean of the cost ( put all and divide by simply number of things) b) find the typical --- BE SURE TO...

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