Question

For your summary statement try to explain in a paragraph for each variable, in statistical terms,

what the 90% confidence interval means for each of these variables.

In other words, how do we interpret these numbers in our SPSS

output?

HRSRELAX (hours per day respondents have to relax)

Mean:                            90% confidence interval lower and upper

Lower class 4.20                2.89/5.51

Working class 3.10           2.87/3.33

Middle class 3.75              3.43/4.08

Upper class 3.36                2.51/4.20

EDUC (highest year of school completed)

Mean:                            90% confidence interval lower and upper

Lower 12.04        11.05/13.03

Working 13.03   12.68/13.37

Middle 15.36      15.03/15.69

Upper 16.86        15.69/18.03

HRS1 (number of hours worked last week)

Mean:                            90% confidence interval lower and upper

Lower 35.72        31.48/39.96

Working 41.80   40.32/43.29        

Middle 42.85      40.98/44.72

Upper 42.86        34.66/51.05

MAEDUC (highest year of school completed, mother)

Mean:                            90% confidence interval lower and upper

Lower 9.48          7.89/11.07

Working 11.31   10.84/11.79

Middle 13.06      12.06/13.52

Upper   14.50     12.38/16.62

Answer 1

HRSRELAX (hours per day respondents have to relax):

If we happen to collect total of 100 random samples from Lower class people and compute sample mean for the no. of relaxation hours per day for each of those 100 samples, we will approximately get 90 sample means out of total 100 as falling within the range of 2.89 to 5.51. Similar interpretation carries through to Middle, working and upper class.

EDUC (highest year of school completed)

If we happen to collect total of 100 random samples from Lower class people and compute sample mean for the highest year of school completed for each of those 100 samples, we will approximately get 90 sample means out of total 100 as falling within the range of 11.05 to 13.03. Similar interpretation carries through to Middle, working and upper class.

HRS1 (number of hours worked last week)

If we happen to collect total of 100 random samples from Lower class people and compute sample mean for the no. of hours worked last week for each of those 100 samples, we will approximately get 90 sample means out of total 100 as falling within the range of 31.48 to 39.96. Similar interpretation carries through to Middle, working and upper class.

MAEDUC (highest year of school completed, mother)

If we happen to collect total of 100 random samples from Lower class people and compute sample mean for the highest year of school completed by mother of the respondent for each of those 100 samples, we will approximately get 90 sample means out of total 100 as falling within the range of 7.89 to 11.07. Similar interpretation carries through to Middle, working and upper class.

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