In Developing an Interval Estimate for a Population Mean,a Sample $\pm$

question 85

Multiple Choice

In developing an interval estimate for a population mean,a sample of 50 observations was used.The interval estimate was 19.76 $\pm$ 1.32.Had the sample size been 200 instead of 50,the interval estimate would have been:

• A) 19.76\(\pm\) .33
• B) 19.76 \(\pm\) .66
• C) 19.76 \(\pm\) 5.28
• D) None of these choices.

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Definitions:

T-tests

Statistical tests used to compare the means of two groups and determine if they are significantly different from each other.

Statistically Different

Being statistically different means that observed differences between groups or variables in a study are unlikely to have occurred by chance, according to statistical analysis. This distinction supports the idea that the observed effects reflect true differences in the populations being studied.

Correlation Coefficients

Statistical measures that quantify the direction and strength of the relationship between two numerical variables.

Continuous Variables

Variables that can take on an infinite number of values within a given range, representing quantities that can be divided into finer units.