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2 years ago

20 points..Please Help!!! I don't understand what to do...can someone walk me through this???

Mathematics

1 answer:

Juli2301 [7.4K]2 years ago

5 0

A) 3. This is the base number somebody would win without ever practicing.

B) y = 2x + 3. The slope of the line of best fit, depending on the points you pick, is roughly 2. Thus the answer for 13 would be 29.

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2 years ago

60.5 minus 15% <br> PLEASE SHOW YOUR WORK

Olin [163]

Answer:

60.35

Step-by-step explanation:

15% as a decimal is 0.15 so, 60.5 - 0.15 = 60.35

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2 years ago

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2 years ago

Here are summary statistics for randomly selected weights of newborn girls: n=185,

Anna11 [10]

Answer:

The confidence interval for the population mean μ is $32.487$

Step-by-step explanation:

Given :

Number of weights of newborn girls n=185.

Mean $\bar{x}=31.4$ hg

Standard deviation s=7.5 hg

Use a 95% confidence level i.e. cl=0.95

To find : What is the confidence interval for the population mean μ?

Solution :

Using t-distribution,

The degree of freedom $DF=n-1=185-1=184$

$\alpha=\frac{1-0.95}{2}$

$\alpha=0.025$

The t critical value is t=1.973.

The confidence interval build is

$CI=\bar{x}\pm(t\cdot \frac{s}{\sqrt{n}})$

Substitute the values,

$CI=31.4\pm(1.973\cdot \frac{7.5}{\sqrt{185}})$

$CI=31.4\pm(1.973\cdot 0.5514)$

$CI=31.4\pm(1.087)$

$31.4+1.087$

$32.487$

Therefore, the confidence interval for the population mean μ is $32.487$

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2 years ago

Solve x^2-16/25=0 please solve step by step

Pachacha [2.7K]

Answer:

x^2-16/25=0

x²=16/25

x=√(16/25)=4/5

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2 years ago