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2 years ago

Simplify the radical

Mathematics

1 answer:

ElenaW [278]2 years ago

7 0

Answer:

Step-by-step explanation:

4 to the 4th power is 256

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Solve x divided by four equals eight . (1 point) 4 −4 32 −32

schepotkina [342]

X/4 = 8
multiply both sides by 4 to get the value of x
x=32

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3 years ago

Read 2 more answers

Write an expression that shows: eighteen more than ten divided by some number

Nikitich [7]

18+ 10/x. That’s the answer

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2 years ago

for every left-handed person, there are about 4 right-handed people. if there are 30 students in a class, perdict the number of

Amanda [17]

So in every 5 people, theres 1 left and 4 right.

so therefore there is 25 right handed people and 5 left handed people

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2 years ago

Consider the following hypothesis test: H0: LaTeX: \mu_1-\mu_2=0μ 1 − μ 2 = 0 Ha: LaTeX: \mu_1-\mu_2\ne0μ 1 − μ 2 ≠ 0 The follow

Pavel [41]

Answer:

$z=\frac{104-\bar 106}{\sqrt{\frac{8.4^2}{80}+\frac{7.6^2}{70}}}}=-1.53$

Step-by-step explanation:

Data given and notation

$\bar X_{1}=104$ represent the mean for the sample 1

$\bar X_{2}=106$ represent the mean for the sample 2

$\sigma_{1} =8.4$ represent the population standard deviation for the sample 1

$\sigma_{2}=7.6$ represent the population standard deviation for the sample 2

$n_{1}=80$ sample size for the group 1

$n_{2}=70$ sample size for the group 2

z would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the means for the two groups are the same, the system of hypothesis would be:

H0: $\mu_{1}-\mu_{2} =0$

H1: $\mu_{1} -\mu_{2} \neq 0$

If we analyze the size for the samples both are greater than 30 and we know the population deviations so for this case is better apply a z test to compare means, and the statistic is given by:

$z=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}}$ (1)

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

First we need to calculate the mean and deviation for each sample, after apply the formulas (2) and (3) we got the following results:

And with this we can replace in formula (1) like this:

$z=\frac{104-\bar 106}{\sqrt{\frac{8.4^2}{80}+\frac{7.6^2}{70}}}}=-1.53$

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3 years ago

Ursula scored 8 points in the second half of her basketball game. In total, she scored 32 points during the entire game. Click o

zhuklara [117]

Answer:

Step-by-step explanation:

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2 years ago