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2 years ago

Look what I found on Wish! I'm giving you $5 off your first purchase with code: cmxhphzh https://dl.wish.com/qdtW6hhhhhgfg

Mathematics

1 answer:

otez555 [7]2 years ago

7 0

Answer:

whats wish?

Step-by-step explanation:

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Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A random sample

GuDViN [60]

Answer: $(628.48,\ 661.52)$

Step-by-step explanation:

Given : Sample size : $n=16$ , which is a small sample (, 30) so we use t-test.

Sample mean : $\overline{x}=645 \text{ hours}$

Standard deviation : $\sigma = 31 \text{ hours}$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=2.131$

The confidence interval for population mean is given by :-

$\overline{x}\pm t_{n-1,\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm(2.131)\dfrac{31}{\sqrt{16}}\\\\\approx645\pm16.52\\\\=(645-16.52,\ 645+16.52)\\\\=(628.48,\ 661.52)$

Hence, a 95% confidence interval for the population mean $\mu$ = $(628.48,\ 661.52)$

6 0

2 years ago

Why is the adjusted average used in math?

Tatiana [17]

It’s used to correct statistical averages that include obvious imbalances because of outliers in the data set.

3 0

3 years ago

If the marginal revenue (in dollars per unit) for a month is given by MR = −0.5x + 400, what is the total revenue from the produ

Vesna [10]

Given:

Marginal revenue (in dollars per unit) for a month is

$MR=-0.5x+400$

To find:

The total revenue from the production and sale of 30 units.

Solution:

We know that, total revenue is integration of marginal revenue with respect to quantity.

$TR=\int MR dx$

$TR=\int (-0.5x+400) dx$

$TR=-0.5\int x dx+400\int 1 dx$

$TR=-0.5\times \dfrac{x^2}{2}+400x$

Now, substitute x=30 in the equation of Total Revenue (TR).

$TR=-0.5\times \dfrac{30^2}{2}+400(30)$

$TR=-0.5\times \dfrac{900}{2}+12000$

$TR=-225+12000$

$TR=11775$

Therefore, the total revenue from the production and sale of 30 units is $11,775.

6 0

2 years ago

What is the slope of the line -9, -6 and 3, -9

adell [148]

Answer:

Step-by-step explanation:

We find the slope is 1/4 by graphing the points. Then counting the slope as rise/run

5 0

2 years ago

Justify how I got x+5=8

Dmitry [639]

X would have to be the variable for 3

8 0

2 years ago

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Look what I found on Wish! I'm giving you $5 off your first purchase with code: cmxhphzh https://dl.wish.com/qdtW6hhhhhgfg​

Look what I found on Wish! I'm giving you $5 off your first purchase with code: cmxhphzh https://dl.wish.com/qdtW6hhhhhgfg