Statistic problem

Using the CIELO data, calculate 95% and 99% confidence intervals for the


Percentage intending to purchase the CIELO



Test the hypothesis that more one-third of the general driving
population would

be willing to purchase the CIELO

To solve problem 3 & 4 use the table below.

The in the table below was collected by a large car manufacturer
concerning a new prototype car called CIELO. Thirty carefully selected
respondents were shown the car and carefully briefed about its
capabilities.

Here is the data which include age (intervally scaled), sex (nominal),
social status (interval scale ranging from 10, low status to 30, high
status), attitude toward CIELO (interval scale from 6, negative to
attitude to 30, positive attitude) and the intention to purchase CIELO
(nominal, yes or no).

A – Is there any difference in male and female attitude toward CIELO?

B – What is the relationship between intention to purchase and
gender?

C- Is there anything unusual about this data?





Social Attitude intention

Respondent Age Sex Status Score to purchase

1 20 M 15.6 16 Y

2 19 F 17.5 17.5 Y

3 34 M 28.2 14 N

4 23 M 24.6 6 N

5 42 M 16.5 28 N

6 55 F 12.2 24 N

7 24 F 12.5 19 Y

8 26 M 29.6 14 N

9 35 F 27.6 23 N

10 41 M 23.2 16 N

11 43 F 21.2 26 Y

12 51 M 20.2 28 N

13 56 M 19.4 14 N

14 62 F 18.6 12 Y

15 43 F 10.2 11 Y

16 51 F 14.3 10 N

17 28 M 12.6 22 Y

18 19 M 14.8 24 N

19 24 M 29.6 19 N

20 26 F 26.5 18 Y

21 28 F 23.2 20 N

22 35 M 17.9 23 N

23 38 F 19.9 23 N

24 23 M 20.1 25 Y

25 42 F 18.6 17 N

26 41 F 18.6 17 N

27 30 F 24.6 16 Y

28 29 M 26.6 13 N

29 19 M 14.5 22 Y

30 26 F 12.9 21 N