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3 years ago

Plz help me on 15 plz thanks if you help

Mathematics

1 answer:

Nitella [24]3 years ago

8 0

Units are simplified first when measurements are multiplied because the units can sometime be very large or small and do not have to be exact when measurements are precise.

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Math SAT: Suppose the national mean SAT score in mathematics was 510. In a random sample of 50 graduates from Stevens High, the

sukhopar [10]

Answer:

Mean SAT score for Stevens High graduates are not the same as the national average.

Step-by-step explanation:

We are given the following information in question:

Population mean, μ = 510

Sample mean, $\bar{x}$ = 501

Sample size, n = 50

Alpha, α = 0.10

Sample standard deviation, s = 30

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 510\\H_A: \mu \neq 510$

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,

$t_{stat} = \displaystyle\frac{501 - 510}{\frac{30}{\sqrt{49}} } = -2.1$ Now,

$t_{critical} \text{ at 0.10 level of significance, 49 degree of freedom } = \pm 1.6765$ Since,

$t_{stat} < t_{critical}$

We reject the null hypothesis and fail to accept it.

We accept the alternate hypothesis and mean SAT score for Stevens High graduates are not the same as the national average.

3 0

3 years ago

Write the expression in simplest radical form. √75 √75 3√5 5√3 15

Wittaler [7]

Go to Mathway .com they'll help you out and do it for you
that way you dont have to wait

4 0

3 years ago

Every month, $50 is withdrawn from Tom's savings account to pay for his gym membership. He has enough savings to withdraw no mor

ella [17]

Answer:

200 divided by 50= 4 so 4 months

Step-by-step explanation:

4 0

3 years ago

The (blank) of a conditional switches the hypothesis and conclusion

Elanso [62]

The converse of a conditional statement switches the hypothesis and conclusion.

4 0

3 years ago

What is 13.984 rounded to the nearest tenth

eimsori [14]

13.984 rounded to the nearest tenth is 14

.984 is closer to 1 than to .9, so we have to round up.

7 0

3 years ago