Share
In 2019, 15.9% of Broadway actors were acting in their first role on Broadway. Suppose we took a survey of 38 Broadway actors and found that
Question
In 2019, 15.9% of Broadway actors were acting in their first role on Broadway. Suppose we took a survey of 38 Broadway actors and found that 18.4% of the actors we surveyed were first-timers. What are the mean and standard deviation for the sampling distribution of pÌ p^? 1. Mean: 0.159, Standard Deviation: 0.0592. Mean: 0.159, Standard Deviation: 0.36573. Mean: 0.184, Standard Deviation: 0.0634. Mean: 0.184, Standard Deviation: 0.0595. Mean: 0.159, Standard Deviation: 0.063In 2019 the CDC reported that 14.0% of US adults are smokers. Suppose you take a random sample of 30 smokers and find that the proportion of them who are current smokers is 16.7%.What is the mean and the standard deviation of the sampling distribution of pÌ p^ ?1. mean = 0.140, standard deviation = 0.0682. mean = 0.167, standard deviation = 0.0633. mean = 0.140, standard deviation = 0.0634. mean = 0.167, standard deviation = 0.068
in progress
0
Mathematics
3 years
2021-08-05T07:27:27+00:00
2021-08-05T07:27:27+00:00 1 Answers
41 views
0
Answers ( )
Answer:
For the Broadway actors acting in their first role on Broadway, mean: 0.184, Standard Deviation: 0.063.
For the proportion of smokers, mean = 0.167, standard deviation = 0.068
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean
and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean
and standard deviation ![Rendered by QuickLaTeX.com s = \sqrt{\frac{p(1-p)}{n}}](https://documen.tv/wp-content/ql-cache/quicklatex.com-00023124723f30bde741bd4eedc6930c_l3.png)
Suppose we took a survey of 38 Broadway actors and found that 18.4% of the actors we surveyed were first-timers.
This means that![Rendered by QuickLaTeX.com p = 0.184, n = 38](https://documen.tv/wp-content/ql-cache/quicklatex.com-dd638547d71b21ffb2a9df58e2c8e7ad_l3.png)
What are the mean and standard deviation for the sampling distribution of p^?
Mean:
Standard deviation:
Suppose you take a random sample of 30 smokers and find that the proportion of them who are current smokers is 16.7%.
This means that![Rendered by QuickLaTeX.com n = 30, p = 0.167](https://documen.tv/wp-content/ql-cache/quicklatex.com-0fc5dd6c2e3655e3d2e6e0c5d2c0357a_l3.png)
What is the mean and the standard deviation of the sampling distribution of p^ ?
Mean:
Standard deviation: