Uppgiftsinlämning 7

Ludvig Londos och Kalle Palm (laddy_ludde@msn.com, kalle.palm@gmail.com)

11.01

(a)

Sant

(b)

Sant

(a)

Kvantilfråga

qnorm(0.01, mean = 100, sd = 15)

## [1] 65.1

65

(b)

Percentile

©

qnorm(c(0.25, 0.75), mean = 100, sd = 15)

## [1]  89.88 110.12

(d)

qnorm(c(0.1, 0.9), mean = 100, sd = 15)

## [1]  80.78 119.22

(e)

pnorm(120, mean = 100, sd = 15) - pnorm(100, mean = 100, sd = 15)

## [1] 0.4088

11.02

(a)

B

(b)

A

©

C

11.05

(a)

B

(b)

A

©

D

(d)

D

(e)

C

11.10

(a)

C

(b)

A

©

C

11.23

(a)

A

(b)

D

©

C

(d)

A

(e)

A

(f)

B

(g)

A

12.01

(a)

point.estimate

(b)

margin.of.error

©

confidence.level

12.02

(a)

C

(b)

B

12.04

B

12.10

1.

kidB = subset(kids, sex == "B")
confint(kidB)

##                method estimate    lower   upper level
## name             none       NA       NA      NA    NA
## birthmonth     t.test     6.30  4.66389  7.9361  0.95
## birthyear      t.test    87.75 87.54208 87.9579  0.95
## length         t.test    25.11 24.53554 25.6745  0.95
## width          t.test     9.19  8.97856  9.4014  0.95
## sex        binom.test     1.00  0.83157  1.0000  0.95
## biggerfoot binom.test     0.55  0.31528  0.7694  0.95
## domhand    binom.test     0.25  0.08657  0.4910  0.95

9.19+/-0.211

2.

confint(kids)

##                method estimate    lower   upper level
## name             none       NA       NA      NA    NA
## birthmonth     t.test   6.1026  5.01264  7.1925  0.95
## birthyear      t.test  87.8205 87.69449 87.9465  0.95
## length         t.test  24.7231 24.29597 25.1502  0.95
## width          t.test   8.9923  8.82712  9.1575  0.95
## sex        binom.test   0.5128  0.34780  0.6758  0.95
## biggerfoot binom.test   0.5641  0.39621  0.7219  0.95
## domhand    binom.test   0.2051  0.09296  0.3646  0.95

8.99+/-0.16

3.

kidG = subset(kids, sex == "G")
confint(kidB) - confint(kidG)

## Warning: - not meaningful for factors

##            method estimate    lower    upper level
## name           NA       NA       NA       NA    NA
## birthmonth     NA  0.40526  0.35876  0.45176     0
## birthyear      NA -0.14474 -0.20069 -0.08879     0
## length         NA  0.78395  0.85564  0.71225     0
## width          NA  0.40579  0.43225  0.37933     0
## sex            NA  1.00000  0.83157  0.82353     0
## biggerfoot     NA -0.02895 -0.01972 -0.02806     0
## domhand        NA  0.09211  0.05275  0.09526     0

0.406+/-0.3