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3 years ago

Help please please please !!

Mathematics

1 answer:

topjm [15]3 years ago

3 0

13.7%

Step-by-step explanation:

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Can someone help me with this too??

makvit [3.9K]

Answer:

Step-by-step explanation:

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3 years ago

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In a two-tailed 2-sample z-test you find a P-Value of 0.0278. At what level of significance would you choose to reject the null

Basile [38]

Answer:

5% or 0.05

Step-by-step explanation:

The null hypothesis will be rejected if p-value is less than significance level.

The null hypothesis can be rejected on 5% and 10% level of significance, but 5% level of significance is a suitable choice because when the 5% significance level is used the confidence level is 95% where as in case of 10% the confidence level is 90%. In short, the significance level indicates the probability of rejection of null hypothesis when the null hypothesis is true and the lesser probability of taking that risk will be better.

So, the scenario indicates the suitable significance level as 0.05.

8 0

4 years ago

How do I solve a question like this? (-4)5-(-6)(-4)+40

ra1l [238]

Answer:

-4

Step-by-step explanation:

We are given the following expression which we are to solve:

$( - 4 ) 5 - ( - 6 ) ( - 4 ) + 4 0$

Since this expression includes brackets as well has plus and minus signs, so we will follow the standard order of operations to solve this expression.

Solving the brackets first to get:

$( - 2 0 ) - ( 2 4 ) + 4 0$

Now adding all the terms up to get:

-4

4 0

4 years ago

Are you smarter than a fifth grader Answer these

uysha [10]

No I’m not smarter than a fifth grader

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3 years ago

Ali, Ben, and Cliff plant seedlings in their neighborhood park. Ali plants 40% of the total number of seedlings, Ben plants 45%

Juli2301 [7.4K]

Answer:

580 seedlings altogether.

Step-by-step explanation:

Given that,

Ali plants 40% of the total number of seedlings, Ben plants 45% of the total number of seedlings, and Cliff plants the rest of the seedlings. Cliff plants 87 seedlings.

The percentage of the seedling planted by Cliff = 100% - 45% - 40% = 15%

Let x = the total number of seedlings

$15\%\ of\ x=87\\\\x=\dfrac{87\times 100}{15}\\\\x=580$

Hence, three boys plant 580 seedlings altogether.

7 0

3 years ago