Pregunta
You take a sample of size 35 from a very large population in which the true proportion of males is \( p=0.52 \). Which of the statements below best describes what is known about the sampling distribution of \( \hat{p} \), the sample proportion of males?
Ask by Fuentes Boone. in the United States
Feb 26,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
The sampling distribution of \( \hat{p} \) is approximately normal with a mean of 0.52 and a standard deviation of approximately 0.084.
Solución
To determine what is known about the sampling distribution of \( \hat{p} \), the sample proportion of males, we can use the properties of the sampling distribution of a proportion.
Given:
- Sample size \( n = 35 \)
- True proportion of males in the population \( p = 0.52 \)
The sampling distribution of \( \hat{p} \) is approximately normal with mean \( p \) and standard deviation \( \sqrt{\frac{p(1-p)}{n}} \).
Therefore, the sampling distribution of \( \hat{p} \) is approximately normal with mean \( 0.52 \) and standard deviation \( \sqrt{\frac{0.52(1-0.52)}{35}} \).
Let's calculate the standard deviation of the sampling distribution of \( \hat{p} \).
Calculate the value by following steps:
- step0: Calculate:
\(\sqrt{\frac{0.52\left(1-0.52\right)}{35}}\)
- step1: Subtract the numbers:
\(\sqrt{\frac{0.52\times 0.48}{35}}\)
- step2: Multiply the numbers:
\(\sqrt{\frac{0.2496}{35}}\)
- step3: Divide the terms:
\(\sqrt{\frac{156}{21875}}\)
- step4: Use the properties of radicals:
\(\frac{\sqrt{156}}{\sqrt{21875}}\)
- step5: Simplify the expression:
\(\frac{2\sqrt{39}}{25\sqrt{35}}\)
- step6: Multiply by the Conjugate:
\(\frac{2\sqrt{39}\times \sqrt{35}}{25\sqrt{35}\times \sqrt{35}}\)
- step7: Multiply the numbers:
\(\frac{2\sqrt{1365}}{25\sqrt{35}\times \sqrt{35}}\)
- step8: Multiply the numbers:
\(\frac{2\sqrt{1365}}{875}\)
The standard deviation of the sampling distribution of \( \hat{p} \) is approximately \( 0.084448 \).
Therefore, the statement that best describes what is known about the sampling distribution of \( \hat{p} \) is that it is approximately normal with mean \( 0.52 \) and standard deviation \( 0.084448 \).
Respondido por UpStudy AI y revisado por un tutor profesional
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