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Create one confidence interval

Statistics

Create one confidence interval. Interpret your confidence interval in the context of your data.

  1. Clearly state what you are trying to estimate. (What question or claim about the data are you trying to answer?)
  2. Identify which variable(s) you are using for your confidence interval.
  3. State your level of confidence.
  4. State which distribution you are using (Normal distribution, Student t distribution, or Chi-Squared distribution).
  5. Find and state your confidence interval.
  6. Interpret your confidence interval in the context of the data. Be sure to use a complete sentence and include proper units as necessary.
  7. Comment on your conclusion: do the results surprise you, or is it what you expected? Why?

 

Row

CAR

SIZE

WEIGHT

LENGTH

BREAKING

CYLINDER

DISPLACEME

CITY

HIGHWAY

GHG

1

Chev Aveo

Small

2560

154

133

4

1.6

25

34

6.6

2

Honda Civic

Small

2740

177

136

4

1.8

25

36

6.3

3

Mitsubishi Land

Small

3610

177

126

4

2

22

28

7.7

4

VW Jetta

Small

3225

179

137

4

2

29

40

6.4

5

Hyundai Elantr

Small

2895

177

138

4

2

25

33

6.6

6

Kia Rio

Small

2615

167

132

4

1.6

27

35

6.1

7

Subaru Impreza

Small

3110

180

135

4

2.5

20

26

8.3

8

Ford Fusion

Midsize

3320

191

136

4

2.3

20

28

8

9

Nissan Altima

Midsize

3215

190

136

4

2.5

23

31

7.1

10

Nissan Maxima

Midsize

3555

191

128

6

3.5

19

26

8.3

11

Honda Accord

Midsize

3270

194

140

4

2.4

21

30

7.7

12

Volvo S60

Midsize

3465

180

140

5

2.5

19

28

8

13

VW Passat

Midsize

3465

188

135

4

2

19

29

8

14

Toyota Camry

Midsize

3530

189

137

4

2.4

21

31

7.3

15

Toyota Avalon

Large

3600

197

139

6

3.5

19

28

8

16

Hyundai Azera

Large

3835

193

134

6

3.3

18

26

8.7

17

Cadillac DTS

Large

4085

208

145

8

4.6

15

23

10.2

18

Lincoln Town

Large

4415

215

143

8

4.6

16

24

9.6

19

Dodge Charger

Large

4170

200

131

6

2.7

18

26

8.7

20

Merc Gr Marq

Large

4180

212

140

8

4.6

16

24

9.6

21

Buick Lucerne

Large

4095

203

143

8

4.6

17

25

10.2

 

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