One of the questions on a survey of 1,000 adults asked if today's children will be better off than their parents. Representative data are shown in the file named childoutlook. A response of yes indicates that the adult surveyed did think today's children will be better off than their parents. A response of no indicates that the adult surveyed did not think today's children will be better off than their parents. A response of not sure was given by 23% of the adults surveyed.

Explanation:

The missing representative data include the file named Childoutlook is an excel spreadsheet showing the response to the survey. The missing file is shown in the document attached below.

From the first question in the attached file below:

a) To find the point estimate, we use the formula:

where;

x = number of adult that said "yes" = 240

n = total adults = 1000

b)

To find the margin of error at 95% confidence interval.

The Margin of Error

At 95% C.I ; The level of significance = 1 - 0.95 = 0.05

The critical value at

Then, the margin of error

M.O.E =/ 1.96 × 0.013506

The Margin of Error M.O.E = 0.0265

c)

To determine the 95% C.I for the adults who thought that today children will be better than their parents.

i.e.

C.I =

C.I = 0.24 ± 0.0265

C.I = (0.24 - 0.0265, 0.24 + 0.0265)

C.I = (0.2135

, 0.2665

)

C.I = ( 0.214, 0.267)   to 3 decimal places

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i think this is right, if not and you know better let me know.

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