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3 years ago

2 x (10 + 5) 2 x 10 + 5 Which one is equivalent if not fine the value

Mathematics

1 answer:

dmitriy555 [2]3 years ago

5 0

Answer:

They are not equivalent, the second equation should be 2 x 10 + 2 x 5

Step-by-step explanation:

distributive property

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3 years ago

find the value of cos theta, if sin theta= 1/2; 0 degrees greater than or equal to theta < 90 degrees

vagabundo [1.1K]

Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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What is the interquartile range for the data set??

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Answer:

Step-by-step explanation:

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3 years ago

The proportion of left handed people in the population is about 0.10. Suppose a random sample of 300 people is observed. (a) Wha

pantera1 [17]

Answer: $(\hat{p})\sim N(0.10,\ 0.017)$

Step-by-step explanation:

Sampling distribution of the sample proportion $(\hat{p})$ :

$(\hat{p})\sim N(p,\ \sqrt{\dfrac{p(1-p)}{n}})$

The sampling distribution of the sample proportion $(\hat{p})$ has mean = $\mu_{\hat{p}}=p$ and standard deviation = $\sigma_{\hat{p}}=\sqrt{\dfrac{p(1-p)}{n}}$ .

Given : The proportion of left handed people in the population is about 0.10.

i.e. p=0.10

sample size : n= 300

Then , the sampling distribution of the sample proportion $(\hat{p})$ will be :-

$(\hat{p})\sim N(0.10,\ \sqrt{\dfrac{0.10(1-0.10)}{300}})$

$(\hat{p})\sim N(0.10,\ \sqrt{0.0003})$

$(\hat{p})\sim N(0.10,\ 0.017)$ (approx)

Hence, the sampling distribution of the sample proportion $(\hat{p})$ is $(\hat{p})\sim N(0.10,\ 0.017)$

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3 years ago