All categories

2 years ago

Each of the

Mathematics

1 answer:

lana66690 [7]2 years ago

4 0

Step-by-step explanation:

(4,8+8,9+14,19+20)/4=11,9725

You might be interested in

According to a certain website, wine critics generally use a wine-scoring scale to communicate their opinions on the relative qu

const2013 [10]

Answer:

$\bar x = 82$

$\sigma = 9.64$

Step-by-step explanation:

Given

$n = 12$

$87\ 91\ 86\ 82\ 72\ 91\ 60\ 77\ 80\ 79\ 83\ 96$

Solving (a); Point estimate of mean

To do this, we simply calculate the sample mean

$\bar x = \frac{\sum x}{n}$

$\bar x = \frac{87+ 91+ 86+ 82+72+91+60+77+80+79+83+96}{12}$

$\bar x = \frac{984}{12}$

$\bar x = 82$

Solving (b); Point estimate of standard deviation

To do this, we simply calculate the sample standard deviation

$\sigma = \sqrt{\frac{\sum(x-\bar x)^2}{n - 1}$

$\sigma = \sqrt\frac{(87-82)^2+ (91-82)^2+ ....+ (79-82)^2+ (83-82)^2+ (96-82)^2}{12-1}$

$\sigma = \sqrt\frac{1022}{11}$

$\sigma = \sqrt{92.91}$

$\sigma = 9.64$

Note that: The sample mean and the sample standard deviation are the best point estimators for the mean and the standard deviation, respectively.

Hence, the need to solve for sample mean and sample standard deviation

3 0

2 years ago

Charlemagne’s column covers the first 12 miles in 4 hours. He then increased the speed by 2 miles per hour. If the total distanc

Mashutka [201]

Answer:

12 miles in 4 hours is 3 mph

52-12=40 miles left

40 miles at 5 mph would take 8 hours

8+4=10

it took 10 hours to finish the trip.

8 0

2 years ago

1.2 x + 4.6 > 54.6 − 0.8 x

Sedbober [7]

Answer:

look the photo

Step-by-step explanation:

..0000000000000000

3 0

2 years ago

Read 2 more answers

The area of one side of a U.S. 50-cent piece is 735 square millimeters. What is the diameter of the half-dollar, rounded to the

ryzh [129]

30.6

735
——
3.14

find the square root, then multiply it by 2

6 0

2 years ago

Read 2 more answers

Graph the function. y = 1/5 (3)^x Graph A. B. C. or D?

patriot [66]

The function $y=3^x$ is incresing and have positive values for all x. Then the function $y=\dfrac{1}{5}\cdot 3^x$ is also increasing and have positive values for all x. This means that options B (values are negative) and D (function is decreasing) are incorrect.

At x=0, $y=\dfrac{1}{5} \cdot 3^x=\dfrac{1}{5} \cdot 3^0=\dfrac{1}{5} \cdot 1=\dfrac{1}{5}$ .

In option A graph of the function passes through point (0,y), where y is near 3. In option C graph of the function passes through point (0,y), where y is near 1/5. So, you can conclude that the option C is correct.

8 0

2 years ago