A medical researcher says that less than 25% of U.S. adults are smokers. In a simple random sample of 300 U.S. adults, 20% were smokers. Can we conclude that less than 25% of U.S. adults are smokers? Use 10% to decide. Round to the fourth Ho:P 0.25 HA:P 0.25 What's the minimum population size required? | Enter an integer or decimal number [more..] How many successes were there? 60 Test Statistic: P-value: Did something significant happen? (Significance Happened
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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![A medical researcher says that less than 25% of U.S. adults are smokers. In a simple random sample of 300 U.S.
adults, 20% were smokers. Can we conclude that less than 25% of U.S. adults are smokers? Use 10% to decide.
Round to the fourth
Ho:p
O° 0.25 V
HA: P
0.25 V o
<
What's the minimum population size required?O
Enter an integer or decimal number [more..]
How many successes were there? 60
Test Statistic:
P-value:
Did something significant happen? ( Significance Happened
Select the Decision Rule: [ Reject the Null
There is
enough evidence to conclude ( that less than 25% of U.S. adults are smokers](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4adca0a7-54cd-45f6-bf8d-3920200fbf67%2F2c2ef5e0-d174-4dfe-938e-89803c965c12%2F18u5sxh_processed.jpeg&w=3840&q=75)
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