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3 years ago

What is vertical angles congruence theorem

2 answers:

8 0

This mean that vertical angles, angles that are opposite each other and formed by two intersecting straight lines, are congruent.

gizmo_the_mogwai [7]3 years ago

7 0

I don’t really know bro

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Which point plotted below has coordinates (4, -2)?

Lady bird [3.3K]

Point d that is option d

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3 years ago

Read 2 more answers

Need help ASAP

iragen [17]

Answer:

Step-by-step explanation:

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2 years ago

what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

$\sigma_x = \frac{16}{8}$

$\sigma_x = 2$

Next, calculate the sample mean $\bar_x$

$\bar x = \mu$

So:

$\bar x = 20$

So, we have:

$\sigma_x = 2$

$\bar x = 20$

$x = 21$

Calculate the z score

$x = \frac{x - \mu}{\sigma}$

$x = \frac{21 - 20}{2}$

$x = \frac{1}{2}$

$x = 0.50$

So, we have:

$P(x \le 21) = P(z \le 0.50)$

From the z table

$P(z \le 0.50) = 0.69146$

So:

$P(x \le 21) = 0.69146$

4 0

3 years ago

A survey shower that 82% of adults need correction for their eyesight. If 18 adults are randomly selected, find the probability

Ksju [112]

Answer: yes.

Step-by-step explanation:

18 people × .82 percent = 14.76

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3 years ago

A sales manager gathered information on the number of sales calls made and the number of copiers sold for a random sample of 20

lubasha [3.4K]

Answer:

. The sales manager gathered information on the numbers of sales calls made and the number of copiers sold for a random sample of sales representative. Is there a positive correlation between calls made and copiers? Test at the 0.05 level of significance. Determine the 90% prediction interval for 60 number of calls made. * Calls, X Sold. Y 20 40 20 50 40 60 50 90 40 80 20 40 40 60 30 60

5 0

2 years ago