3 years ago

I need this I really really do

Mathematics

1 answer:

alexira [117]3 years ago

6 0

Answer:

but i cant see the question

Step-by-step explanation:

if not i would have helped

You might be interested in

There are 169 million registered voters in the us. determine an interval for the number (how many) of registered democrats in th

VashaNatasha [74]

Part A:

Given that in a sample of 400 registered voters, 204 were democrats, i.e. n = 400, $\hat{p}= \frac{204}{400} =0.51$

The 95% confidence interval for the proportion of registered democrats voters in the population is given by:

$95\%\ C.I.=\hat{p}\pm z_{\alpha/2}\sqrt{\frac{\hat{p}(1-\hat{p})}{n}} \\ \\ =0.51\pm1.96\sqrt{\frac{0.51(1-0.51)}{400}}=0.51\pm1.96\sqrt{\frac{0.2499}{400}} \\ \\ =0.51\pm1.96(0.025)=0.51\pm0.049=(0.51-0.049,\ 0.51+0.049) \\ \\ =\bold{(0.461,\ 0.559)}$

Part B:

Given that there are 169 million registered voters in the US, the interval for the number of registered democrats in the population is given by

[0.461(169,000,000), 0.559(169,000,000)] = (77,909,000, 94,471,000)

6 0

3 years ago

Two sets of the sum of a number and eight are added to five times the same number

pantera1 [17]

13+13
That’d be
26!!!!

7 0

3 years ago

Ruby and her friends are going into a restaurant. How much would it cost to buy 3

Gnoma [55]

Answer:

Step-by-step explanation:

3x2.25=6.75

4x4=16

16+6.75=22.75

8 0

3 years ago

Which ordered pair is a solution of the equation? -4r +7= 2y - 3

Mars2501 [29]

Answer:

y=-8, r= 2. this is your answer

6 0

3 years ago

How to remove Dec in casio calculator? 0

vladimir1956 [14]

Answer:

htgjyk

Step-by-step explanation:

8 0

3 years ago