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2 years ago

How do u find the product of 54.2and 10 to the second power

Mathematics

1 answer:

NARA [144]2 years ago

4 0

293764 would be the answer to this question

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What equation will be the result if the ELIMINATION Method is applied? *

BARSIC [14]

12x = 12; x = 1

That simple

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2 years ago

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Rus_ich [418]

Answer:

The FG is 9cm

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2 years ago

Find the value of the discriminant of each quadratic equation:<br>-2x^2-x-1=0

Blizzard [7]

$\Delta=b^2-4ac\\
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2 years ago

What is the value of 5 in 43.245

Reptile [31]

4➡ tens
3 ➡ ones
----------------
2➡tenths
4➡hundredths
5➡ thousandths

Anything behind the decimal point ends with a "ths" ("th" )

So, the value of "5" might be 'thousandths'

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3 years ago

In Pennsylvania the average IQ score is 101.5 The variable is normally distributed and the population standard deviation is know

elena-14-01-66 [18.8K]

Answer:

P-value = 0.0368

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, $\bar{x}$ = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 101.5\\H_A: \mu> 101.5$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.64$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, students in Pennsylvania have an IQ that is significantly greater than the state average.

P-value can be calculated with the standard normal table.

P-value = 0.0368

P-value is lower than the significance level.

4 0

3 years ago