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2 years ago

How many grams are equal to 3,418 milligrams? Use the placement of the decimal point when dividing by a power of 10 to help you.

Mathematics

1 answer:

Inessa [10]2 years ago

5 0

Answer:

3.418 grams

Step-by-step explanation:

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A random sample of 10 parking meters in a beach community showed the following incomes for a day. Assume the incomes are normall

Vlad1618 [11]

Answer: (2.54,6.86)

Step-by-step explanation:

Given : A random sample of 10 parking meters in a beach community showed the following incomes for a day.

We assume the incomes are normally distributed.

Mean income : $\mu=\dfrac{\sum^{10}_{i=1}x_i}{n}=\dfrac{47}{10}=4.7$

Standard deviation : $\sigma=\sqrt{\dfrac{\sum^{10}_{i=1}{(x_i-\mu)^2}}{n}}$

$=\sqrt{\dfrac{(1.1)^2+(0.2)^2+(1.9)^2+(1.6)^2+(2.1)^2+(0.5)^2+(2.05)^2+(0.45)^2+(3.3)^2+(1.7)^2}{10}}$

$=\dfrac{30.265}{10}=3.0265$

The confidence interval for the population mean (for sample size <30) is given by :-

$\mu\ \pm t_{n-1, \alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=t_{9,0.025}=2.262$

We assume that the population is normally distributed.

Now, the 95% confidence interval for the true mean will be :-

$4.7\ \pm\ 2.262\times\dfrac{3.0265}{\sqrt{10}} \\\\\approx4.7\pm2.16=(4.7-2.16\ ,\ 4.7+2.16)=(2.54,\ 6.86)$

Hence, 95% confidence interval for the true mean= (2.54,6.86)

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3 years ago

Use pemdas 3 x (5 - 1) + 13 write 3 steps

ehidna [41]

Step-by-step explanation:

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2 years ago

What is the value of this expression? 4/15+3/5−2/3 Quick

VMariaS [17]

Answer:

I think that would be 1/5

Explanation:

Hope this helps!

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1 year ago

In which quadrants does sin and cos have opposite signs.

Romashka [77]

Quadrants 2 and 4 because in quadrant 2, cosine is negative and sin is positive, while in quadrant 4, cosine is positive and sin is negative

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2 years ago

What is the simple interest on $360 borrowed for 30 months at 12.3%? (PLEASE EXPLAIN)

DanielleElmas [232]

Interest = principal * rate * time / 100 = 360 * 12.3 * 2.5 / 100 (Note 30 months = 2.5 years)

Answer is $110.70

5 0

3 years ago

Read 2 more answers