2 years ago

Last question i have to solve!!!!

Mathematics

1 answer:

kramer2 years ago

4 0

The location of the point that is 3/4 the distance from

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An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 232\\H_A: \mu \neq 232$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{231.5- 232}{\frac{2.19}{\sqrt{66}} } = -1.8548$

Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971$

Since,

$|t_{stat}| > |t_{critical}|$

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

4 0

3 years ago

Please help, this is due soon!

Oliga [24]

Before outlier : 7.25
After outlier : 4

7.25 - 4 = 3.25

So the mean decreases by 3.25 when the outlier is removed.

6 0

3 years ago

3/5 = x/6 that = 10 rightt??

Igoryamba

Yesss ur answer is correct

5 0

2 years ago

Read 2 more answers

HELP PLS ITS URGENT

Andre45 [30]

Answer:

that looks to be a 45 degree angle but I'm not sure

8 0

2 years ago

Simplify the expression below (assuming x and y are non-zero numbers).

Yuri [45]

Answer: Option 2

Step-by-step explanation:

$\frac{15x^4y^-^2}{3x^2y^3}$

Divide 15 by 3 and substract the variables's exponents.

$5x^4^-^2y^-^2^-^3$

Solve;

$5x^2y^-^5$

$\frac{5x^2}{y^5}$

4 0

3 years ago

Last question i have to solve!!!!​

Last question i have to solve!!!!