3 years ago

BRAINLIEST! Please help me out!

Mathematics

1 answer:

Oduvanchick [21]3 years ago

8 0

Answer:

The question is what does x mean. And x = 2/25 and in decimal form x equals 0.08.

Step-by-step explanation:

Hope this helps:) May I have brainliest?

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A data set has a mean of 720 and a standard deviation of 6. which is closest to the z-score for an element of this data set with

lisabon 2012 [21]

Mean = u = 720
Standard deviation = s = 6
Data Value = x = 709

The formula to calculate the z score is:

$z= \frac{x-u}{s}$

Using the values, we get:

$z= \frac{709-720}{6} \\ \\ 
z=-1.83$

Thus the z score for the data value will be -1.83.

7 0

3 years ago

A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these so

otez555 [7]

Answer: (0.132132, 0.274368)

Step-by-step explanation:

Given : A simple random sample of 123 people living in Gastown and finds that 25 have an annual income that is below the poverty line.

i.e. n= 123

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Critical value for 95% confidence interval : $z_{\alpha/2}=1.96$

Confidence interval for population :

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

i.e. $0.203252\pm (1.96)\sqrt{\dfrac{0.203252(1-0.203252)}{123}}$

$0.203252\pm (1.96)\sqrt{\dfrac{0.203252(1-0.203252)}{123}}\\\\\0.203252\pm0.071118\\\\=(0.20325-0.071118,\ 0.203252+0.071118)\\\\=(0.132132,\ 0.274368)$