A research study was conducted to examine the effect öf Fäcebook on perceived life satisfaction. eight subjects were selected who have never had a Facebook account and another eight subjects were randomly selected from a set of active Facebook users. AIl subjects were given a life satisfaction test known to have high reliability and validity. Scores are selected on a scale ranging from 0 to 60 with high scores indicating high life satisfaction; and low scores indicating low life satisfaction. The data are presented below. Use a= .01, and assume equal variances. No Facebook 45 38 52 48 25 39 51 46 Active Facebook 34 22 15 27 37 41 24 19 The alternative hypothesis for this study is: O a. HO: µ2 >0 Ob. HO: ul - p2 >0 C. HO: ul - p2 # 0 d. HO: ul =0
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.
Step by step
Solved in 2 steps