In developing an interval estimate for a population mean, a sample of 50 observations was used. The interval estimate was 19.76 ±1.32. Had the sample size been 200 instead of 50, the interval estimate would have been O A. 4.94 + 1.32 о В. 19.76 + 0.66 OC. 19.76 + 0.33 O D. 9.88 ± 1.32 In developing an interval estimate for a population mean, the interval estimate was 62.84 to 69.46. The population standard deviation was assumed to be 6.50, and a sample of 100 observations was used. The mean of the sample was O A. 13.24 о В. 6.15 о с. 56.34 O D. 62.96
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
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