2. a survey of first-time home buyers found that the sample mean annual income was $46,300. assume that the survey used a sample of 28 first-time home buyers and that the sample standard deviation was $1,100. compute and explain a 90% confidence interval estimate of the population mean.

the confidence interval is from 46641.96 to 45958.04

Step-by-step explanation:

Using this formula X ± Z (s/√n)

Where

X = 46300 Mean

S = 1100 Standard Deviation

n = 28 Number of observation

Z = 1.645 The chosen Z-value from the confidence table below

Confidence Interval Z

80%. 1.282

85% 1.440

90%. 1.645

95%. 1.960

99%. 2.576

99.5%. 2.807

99.9%. 3.291

Substituting these values in the formula

Confidence Interval (CI) = 46300 ± 1.645(1100/√28)

CI = 46300 ± 1.645(1100/5.2915)

CI = 46300 ± 1.645(207.8806)

CI = 46300 ± 341.9636

CI = 46300 + 341.9636. ~. 46300 - 341.9636

CI = 46641.96. ~. 45958.04

In other words the confidence interval is from 46641.96 to 45958.04

a line is an defined derm because it

a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.