All categories

3 years ago

Please help! Late work!

Mathematics

1 answer:

frosja888 [35]3 years ago

3 0

(40+41+41+45+48+48+49+49+49+40)/10 = 460/10 = 46

mean = 46

You might be interested in

Find each measurement indicated.

nekit [7.7K]

Answer:

D) 24

explanation:

Sana makatulong

6 0

3 years ago

Each year, all final year students take a mathematics exam. It is hypothesized that the population mean score for this test is 8

drek231 [11]

Answer:

95% Confidence interval: (96.06,103.94)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 85

Sample mean, $\bar{x}$ = 100

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 11

95% Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$100 \pm 1.96(\frac{11}{\sqrt{30}} ) = 100 \pm 3.94= (96.06,103.94)$

(96.06,103.94) is the 95% confidence interval for the population mean test score.

8 0

3 years ago

Select the best answer.

expeople1 [14]

Answer:

-sin x

Step-by-step explanation:

sin(3π/3+x)=sin (π+x)=-sin x

sin (π+x)=sin πcos x+cos π sin x=(0)cos x+(-1)sin x=0-sin x=-sin x

7 0

2 years ago

You have a math test. you plan to study 5/6 hour tonight and 3/4 hour tomorrow.

alekssr [168]

5/6 of an hour is 50 Minutes

3/4 of an hour is 45 Minutes

6 0

3 years ago

Solve for x 13x + 7 = 5x - 20

ivanzaharov [21]

Answer:

13x + 7 = 5x - 20

Step-by-step explanation:

SOLVE for X

13x + 7 = 5x - 20

-------------------------

-5x -7

------------------------

8x=-27

x= -3.375 or -27/8

8 0

3 years ago

Read 2 more answers