sa normal approximation appropriate? Why or Why not? No, because np < 10 or nq < 10 What is the mean of the sampling mean? What is the standard deviation of the sampling proportion? (round to thousan Find the probability that the average time spent on social media of the sample is less than 2 P(ī < 2) =
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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Instructions: Using the information given, determine whether a normal approximation is appropriate,
and then answer the questions.
According to recent research, internet users spend an average of 2.3 hours per day on social media, with
a standard deviation of .3. It is thought that internet usage follows a normal distribution. A random
sample of 5 internet users is selected.
Is a normal approximation appropriate? Why or Why not?
No, because np < 10 or nq < 10
What is the mean of the sampling mean?
What is the standard deviation of the sampling proportion?
(round to thousandths)
Find the probability that the average time spent on social media of the sample is less than 2 hours.
P(T < 2) =
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