You work for a pharmaceutical company that has just created a drug that reduces anxiety. You have decided to test this drug on a standardized anxiety measure and you expect the drug to decrease anxiety scores. The population mean and standard deviation for the anxiety test were (population mean = 26) (population standard deviation = 3.5). you have a sample of 35 participants who take the drug and are tested on the anxiety measure. The sample mean of this group is M= 24.2. perform the six steps of hypothesis testing necessary to determine whether the drug produces lower anxiety score in your sample compared to the general population (using an alpha level of p < .05). then calculate the 90% confidence interval and effect size.
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.
You work for a pharmaceutical company that has just created a drug that reduces anxiety. You have decided to test this drug on a standardized anxiety measure and you expect the drug to decrease anxiety scores. The population mean and standard deviation for the anxiety test were (population mean = 26) (population standard deviation = 3.5). you have a sample of 35 participants who take the drug and are tested on the anxiety measure. The sample mean of this group is M= 24.2. perform the six steps of hypothesis testing necessary to determine whether the drug produces lower anxiety score in your sample compared to the general population (using an alpha level of p < .05). then calculate the 90% confidence interval and effect size.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
