All categories

3 years ago

Dr. King was born in Atlanta, Georgia. What is the distance in miles from Washington, DCto Atlanta, Georgia?

Mathematics

1 answer:

pochemuha3 years ago

4 0

Answer:

639.4 miles

Step-by-step explanation:

Gmaps

I don't know if you mean straight miles or road/highway miles.

You might be interested in

Given that sin(x)= 7/11, find cos(90-x)

marta [7]

Yes indeed it is 7/11

6 0

3 years ago

Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. Th

Verizon [17]

Answer:

$(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422$

$(21.9-19.8) -1.966 \sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 2.778$

And we are 95% confident that the true difference means are between $1.422 \leq \mu_1 -\mu_2 \leq 2.778$

Step-by-step explanation:

We know the following info:

$\bar X_1 = 21.9$ sample mean for group 1

$\bar X_2 = 19.8$ sample mean for group 2

$s_1 = 3.4$ sample standard deviation for group 1

$s_2 = 3.5$ sample standard deviation for group 2

$n_1 = 200$ sample size group 1

$n_2 = 200$ sample size group 2

We want to find a confidence interval for the difference of means and the correct formula to do this is:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

Now we just need to find the critical value. The confidence level is 0.95 then the significance is $1-0.95 =0.05$ and $\alpha/2 =0.025$ . The degrees of freedom are given by:

$df= n_1 +n_2 -2= 200+200-2= 398$

The critical value for this case would be : $t_{\alpha/2}=1.966$

And replacing into the confidence interval formula we got:

$(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422$

$(21.9-19.8) -1.966 \sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 2.778$

And we are 95% confident that the true difference means are between $1.422 \leq \mu_1 -\mu_2 \leq 2.778$

5 0

3 years ago

The sample means for three samples of 20 are shown in the table. graph Compute the variation of each predicted population mean f

Lyrx [107]

Answer:

Step-by-step explanation:

Sample 1 :1.5

Sample 2:-2.5

sample 3:5.5

6 0

3 years ago

Read 2 more answers

PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!

Semenov [28]

Answer:

1/20

Alternate from 0.05, 20 - 1

Hope this helps

7 0

3 years ago

Read 2 more answers

If a quadratic has x-intercepts at (-1,0) and (6,0), what would be the factored form of the equation?

Roman55 [17]

Answer:

(x+1)(x-6)

Step-by-step explanation:

3 0

3 years ago