3 years ago

What is probality of class 9th in math ?

Mathematics

1 answer:

victus00 [196]3 years ago

4 0

Is this a fake question?

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Dmitrij [34]

Answer: The value of test statistic is 2.442.

Step-by-step explanation:

Since we have given that

n = 238

Sample mean = 23.2 minutes

Standard deviation = 20.26 minutes

Hypothesis :

$H_0:\mu=20\\H_a:\mu\neq 20$

So, the test statistic value would be

$z=\dfrac{\bar{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{23.2-20}{\dfrac{20.26}{\sqrt{236}}}\\\\z=2.442$

Hence, the value of test statistic is 2.442.

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2 years ago

In order to solve the equation below, you need to change it around so that n is by itself. Write this new equation. Do not inclu

ale4655 [162]

N/6=30
Multiply both sides by 6
n=180

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2 years ago

Jose graphed the amount of money paid in relation to the number of avocados bought. Which stamens best describes the unit rate f

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Answer:

$c \: 5dollar \: each$

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2 years ago

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Find the measure of RST.

almond37 [142]

Answer:

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Step-by-step explanation:

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Two less than the product of a number and -5 is -42.

Helga [31]

Answer:

Step-by-step explanation:

(p*-5)-2=-42

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3 years ago