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3 years ago

PLEASE PLEASE HELP ME PLEASE

Mathematics

1 answer:

kaheart [24]3 years ago

8 0

First, you split the triangle down the middle, so you make to right triangles. Then, find the area of one of the right triangles, then you can just multiply it by two, and you get the answer.

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According to Brad, consumers claim to prefer the brand-name products better than the generics, but they can't even tell which is

max2010maxim [7]

Answer:

a. There is not enough evidence to support the claim that the proportion that correctly identifies the chip is significantly smaller than 50%.

b. Test statistic z=-1.001

Step-by-step explanation:

This is a hypothesis test for a proportion.

The claim is that the proportion that correctly identifies the chip is significantly smaller than 50%.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.5\\\\H_a:\pi$

The significance level is 0.01.

The sample has a size n=199.

The sample proportion is p=0.462.

$p=X/n=92/199=0.462$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.5*0.5}{199}}\\\\\\ \sigma_p=\sqrt{0.001256}=0.035$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.462-0.5+0.5/199}{0.035}=\dfrac{-0.035}{0.035}=-1.001$

This test is a left-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z$

As the P-value (0.16) is greater than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the proportion that correctly identifies the chip is significantly smaller than 50%.

7 0

4 years ago

A town has 25,000 people living in it. A survey found out that 66 out of 110 people in the town live in an apartment.Based on th

Anastasy [175]

Answer:

15,000 people

Step-by-step explanation:

This is the question of ratio, it is the quantitative relationship of two number.

In this survey a ratio of 66 people out of 110 is defined as living in apartment, based on this ratio we can estimate the total numbers of people living in apartments.

Total population of the town = 25,000 people

Ratio of people living in apartment = 66 / 110 = 0.6

Town people living in apartment = 25,000 x 0.6 = 15,000 peoples

8 0

3 years ago

8(3+a)=64 what is a=?

8090 [49]

Answer:

Step-by-step explanation:

8(3 + a) = 64

3 + a = 8

a = 5

8 0

3 years ago

Read 2 more answers

Answer to this question

Darina [25.2K]

Answer: The height of the rectangle is 8 centimeters (cm)

How?

A(rea) = B(ase) × H(eight)

Since the question gives us the formula (A = B × H), area (120 cm), and base (15 cm), it fills in some parts of the equation.

So really:

120 = 15 × H <-- This is the formula, but some parts are filled in

Which can be rearranged as:

H = 120 ÷ 15 <-- Solve this

H = 8

Hope this helps.

3 0

3 years ago

The orchard just sold 72 apples, which is 12% of the total number of apples they put up for sale. How many apples did they put u

LUCKY_DIMON [66]

Answer:

600

Step-by-step explanation:

12%=72

1%=6

100%=600

5 0

3 years ago