jamessinatraaa
2022-01-19
Answered

What are the mean and standard deviation of a binomial probability distribution with n=9 and $p=\frac{11}{32}$ ?

You can still ask an expert for help

Alex Sheppard

Answered 2022-01-19
Author has **36** answers

mean =np

$s.d.=\sqrt{npq}$

Explanation:

Using the formula for mean and s.d. above ...

$mean=9\times \frac{11}{32}=\frac{99}{32}\approx 3.09$

$s.d.=\sqrt{9\times \frac{11}{32}\times (1-\frac{11}{32})}\approx 1.425$

Explanation:

Using the formula for mean and s.d. above ...

twineg4

Answered 2022-01-20
Author has **33** answers

Formula:

$\mu =n\cdot p$

$=9\cdot \frac{11}{32}$

=3.06

${\sigma}^{2}=np(1-p)$

$=9\cdot \frac{11}{32}(1-\frac{11}{32})$

=2.01

And finally, taking square root to the variance we get that the population standard deviation is:

$\sigma =\sqrt{{\sigma}^{2}}=\sqrt{2.01}=1.42$

=3.06

=2.01

And finally, taking square root to the variance we get that the population standard deviation is:

asked 2021-03-18

A population of values has a normal distribution with

Find the probability that a single randomly selected value is between 133.6 and 134.1.

Write your answers as numbers accurate to 4 decimal places.

asked 2021-02-21

We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 192 had kids. Based on this, plot a

Express your answer in the form of three inequalities. Give your answers in decimal fractions up to three places

asked 2021-11-04

Compute the distribution of X+Y in the following cases:

X and Y are independent normal random variables with respective parameters$({\mu}_{1},{\sigma}_{1}^{2}){\textstyle \phantom{\rule{1em}{0ex}}}\text{and}{\textstyle \phantom{\rule{1em}{0ex}}}({\mu}_{2},{\sigma}_{2}^{2})$ .

X and Y are independent normal random variables with respective parameters

asked 2022-01-17

What are the mean and standard deviation of a binomial probability distribution with n=11 and

asked 2022-01-28

How do you find the variance and standard deviation of {2,3,4,6,8,9}?

asked 2022-01-27

The heights of a certain group of adult parrots were found to be normally distributed. The mean height is 36 cm with a standard deviation of 7 cm. In a group of 1200 of these birds, how many would be more than 29 cm tall?

asked 2022-01-27

A distribution has a mean of 10400.93 and a standard deviation of 5112.49. What is one standard deviation above the mean?