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3 years ago

Great now I need help with another math problem!! Someone pls help me!!

Mathematics

2 answers:

masya89 [10]3 years ago

8 0

Answer:

option c.............

Mkey [24]3 years ago

8 0

Answer:

option c............

Step-by-step explanation:

y = 4x

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Among a sample of 55 male soldiers the average shower time was found to be 2.95 minutes and the population standard deviation is

Oksanka [162]

Answer: -3.0593

Step-by-step explanation:

The test statistic for the difference between two population mean (when population standard deviations $\sigma_1\ \&\ \sigma_2$ are known ) is given by :-

$z=\dfrac{\overline{x}_1-\overline{x}_2}{\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}}$

where ,

$n_1\ \&\ n_2$ = Sample sizes taken from two populations 1 and 2.

$\overline{x}_1-\overline{x}_2$ = Difference between two Sample mean.

$\sigma_1\ \&\ \sigma_2$ = Standard deviations of populations 1 and 2.

As per given , we have

$n_1=55\ \&\ n_2=58$

$\overline{x}_1=2.95\ \&\ \overline{x}_2=3.3$

$\sigma_1=0.65\ \&\ \sigma_2=0.56$

We assume that the data follows a normal distribution.

Then, the test statistic will be :-

$z=\dfrac{2.95-3.3}{\sqrt{\dfrac{(0.65)^2}{55}+\dfrac{(0.56)^2}{58}}}\\\\=\dfrac{-0.35}{\sqrt{0.0130887}}\\\\=\dfrac{-0.35}{0.1144059}=3.05928278174\approx-3.0593$

Hence, the test statistic= -3.0593

5 0

4 years ago

Number 35 Plz someone help me in this problem ❤️

Free_Kalibri [48]

Greetings!

This can be solved by creating an algebraic equation:
$8.75(30)+11x=400$

Solve for x.
$262.5+11x=400$
Add -262.5 to both sides.
$(262.5+11x)+(-262.5)=(400)+(-262.5)$
$11x=137.5$
Divide both sides by 11.
$(11x)/11=(137.5)/11$
$x=12.5$

You must work 12.5 hours as landscaper to earn $400 a month.

Hope this helps.
-Benjamin

7 0

4 years ago

Charlie know that 3 blocks are needed to make a tower that is 0.5 foot high. How many blocks will he need to make a tower that i

vitfil [10]

Answer:

6 feet

Step-by-step explanation:

that is the answer

6 0

3 years ago

ASAP please help!!!!!!!

allochka39001 [22]

<span>100625 is the answer before you add the discount</span>

8 0

4 years ago

What is the answer <br> simplify 2(5x+3)-2(2x-3)

Pavel [41]

Answer:Use this PEMDAS to solve

Step-by-step explanation:

Parethiesis,Exponent,Multiplication,Division,Addition,and Subtraction.

ALWAYS DO P FIRST!!!!

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3 years ago

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