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3 years ago

PLEASE HELP ASAP! Will give BRAINLIEST! Please answer correctly! No guessing!

Mathematics

1 answer:

lesya [120]3 years ago

6 0

Answer:

jghj

Step-by-step explanation:

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Is a ratio of 2 to 3 equal to a ratio of 2 to 5

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It is not equal to a ratio of 2 \ 5 it is equal to 6 to 1,5 to 1, 3 to 2,
2 to 3 ,1 to 6

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3 years ago

There are 3,525 freshmen at a university. All freshman must attend one orientation session, and there are 15 different sessions

saw5 [17]

Answer:the answer is b

Step-by-step explanation:

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3 years ago

Can someone explain how to get the answer I’m confused on how to solve

Allisa [31]

Answer:

x=29

Step-by-step explanation:

The square notation indicates 90 degrees.

90=(x+3)+(x-1)+(x+1)

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2 years ago

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What is the ordered pair for k?

Morgarella [4.7K]

Answer:

(4, -5)

Step-by-step explanation:

Start from the origin, (0, 0). Go 4 units right and 5 units down.

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3 years ago

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Use the information provided to determine a 95% confidence interval for the population variance. A researcher was interested in

Leno4ka [110]

Answer:

The 95% confidence interval for the population variance is (8.80, 32.45).

Step-by-step explanation:

The (1 - α)% confidence interval for the population variance is given as follows:

$\frac{(n-1)\cdot s^{2}}{\chi^{2}_{\alpha/2}}\leq \sigma^{2}\leq \frac{(n-1)\cdot s^{2}}{\chi^{2}_{1-\alpha/2}}$

It is provided that:

n = 20

s = 3.9

Confidence level = 95%

⇒ α = 0.05

Compute the critical values of Chi-square:

$\chi^{2}_{\alpha/2, (n-1)}=\chi^{2}_{0.05/2, (20-1)}=\chi^{2}_{0.025,19}=32.852\\\\\chi^{2}_{1-\alpha/2, (n-1)}=\chi^{2}_{1-0.05/2, (20-1)}=\chi^{2}_{0.975,19}=8.907$

*Use a Chi-square table.

Compute the 95% confidence interval for the population variance as follows:

$\frac{(n-1)\cdot s^{2}}{\chi^{2}_{\alpha/2}}\leq \sigma^{2}\leq \frac{(n-1)\cdot s^{2}}{\chi^{2}_{1-\alpha/2}}$

$\frac{(20-1)\cdot (3.9)^{2}}{32.852}\leq \sigma^{2}\leq \frac{(20-1)\cdot (3.9)^{2}}{8.907}\\\\8.7967\leq \sigma^{2}\leq 32.4453\\\\8.80\leq \sigma^{2}\leq 32.45$

Thus, the 95% confidence interval for the population variance is (8.80, 32.45).

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3 years ago