The mean response time on a task for 10 younger children (6-10 y.o.a.) is 45 and the mean response time for 14 older children (11-16 y.o.a.) is 30. What is the weighted mean for the two groups (round to nearest tenth)? -> SHOW YOUR WORK ON YOUR SCRAP PAPER!!! 36.25 37.5 38.75 answer not listed- see work on scrap paper
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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The
mean response time on a task for 10 younger children (6-10 y.o.a.) is 45 and the mean response time for 14 older children (11-16 y.o.a.) is 30. What is the weighted mean for the two groups (round to nearest tenth)?-> SHOW YOUR WORK ON YOUR SCRAP PAPER!!!
36.25
37.5
38.75
answer not listed- see work on scrap paper
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