4 years ago

Need help with all questions.

Mathematics

1 answer:

agasfer [191]4 years ago

8 0

Im in your class at school im kayla

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Simplify 5-2 x 55 x 5.

Anestetic [448]

Hello! Your answer is:

5-2*55*5 = -545

7 0

3 years ago

Read 2 more answers

We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 21

katen-ka-za [31]

Answer:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

Step-by-step explanation:

Data given and notation

$n_A = 21$ represent the sampe size for A

$n_B =16$ represent the sample size for B

$s_A = 28.284$ represent the sample deviation for A

$s_B = 20$ represent the sample deviation for B

$\alpha$ represent the significance level provided

F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:

$F=\frac{s^2_1}{s^2_2}$

Solution to the problem

System of hypothesis

We want to test if we have the same variation, so the system of hypothesis are:

H0: $\sigma^2_A = \sigma^2_B$

H1: $\sigma^2_A \neq \sigma^2_B$

Calculate the statistic

Now we can calculate the statistic like this:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

8 0

4 years ago

Which expression is the exponential form of

Zolol [24]

Answer:

d. (4y)^5/2

Step-by-step explanation:

n√a^m=a^(m/n)

4 0

4 years ago

7. Select each problem that has a quotient of 0.4*<br> 16 = 40<br> 24 = 6<br> 60 = 16<br> 3.6 - 9

mr Goodwill [35]

16=40 and then 60=16

8 0

3 years ago

−3=h+8÷2 plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help

mrs_skeptik [129]

Answer:

-7=h

Step-by-step explanation:

−3=h+8÷2

−3=h+4

−3-4=h+4-4

-3-4=h

-7=h

7 0

3 years ago