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3 years ago

I need help asap send in answers please idk what this is

Mathematics

1 answer:

igomit [66]3 years ago

6 0

Answer:

I think it is B...

Step-by-step explanation:

Because of the Alternating Interior angles on both of the parallel lines

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We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando

coldgirl [10]

Answer: $(9.27025,\ 11.12975)$

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : $\overline{x}=10.2$

sample standard deviation : $s= 1.5$

Significance level ; $\alpha= 1-0.90=0.10$

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = $t_{\alpha/2, df}=t_{0.05 , 8}=1.8595$

Confidence interval for the population mean :

$\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

90% confidence interval for the mean value will be :

$10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}$

$10.2\pm (1.8595)\dfrac{1.5}{3}$

$10.2\pm (1.8595)(0.5)$

$10.2\pm (0.92975)$

$(10.2-0.92975,\ 10.2+0.92975)$

$(9.27025,\ 11.12975)$

Hence, the 90% confidence interval for the mean value= $(9.27025,\ 11.12975)$

6 0

3 years ago

( 19, 6), (15. 16). what is the slope?

Brrunno [24]

Answer:

-5/2

to find slope you have to do y2-y1 over x2-x1 so it would be

16-6/15-19 ect.

5 0

3 years ago

The one above me is right

igomit [66]

Huh? What’s above it?

6 0

3 years ago

To convert 2/3 into an equivalent fraction with a denominator of 18, we could multiply only the denominator of 2/3 by.

Naya [18.7K]

Answer:

the answer is true

Step-by-step explanation:

3 0

3 years ago

In the kite, the orange diagonal is 10 units and the purple diagonal is 14 units. What is the area of the kite?

Vlada [557]

Answer: 70 square units

Step-by-step explanation:

Area of kite = (one diagonal * another diagonal) / 2

10 * 14 = 140

140 / 2 = 70

3 0

3 years ago