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2 years ago

What is 0.279 times 53

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

4 0

The answer to this problem would be:
0.279 x 53 = 14.787

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A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Houston. The stud

iris [78.8K]

Answer:

$-0.048$

Do not reject $H_0:P_1-P_2=0$

Step-by-step explanation:

From the question we are told that

Sample size $n_1=350$

Sample size $n_2=250$

Sample proportion 1 $\hat P= \frac{25}{350} =>0.07$

Sample proportion 2 $\hat P= \frac{19}{250} =>0.076$

95% confidence interval

Generally for 95% confidence level

Level of significance

$\alpha = 1-0.95=>0.05$

$\alpha /2=\frac{0.05}{2} =>0.025$

Therefore

$Z_a_/_2=1.96$

Generally the equation for confidence interval between $P_1 - P_2$ is mathematically given as

$(\hat P_1-\hat P_2)\pm Z_a_/_2\sqrt{\frac{\hat P_1(1-\hat P_1)}{n_1}+\frac{\hat P_2(1-\hat P_2)}{n_2} }$

$(0.07-0.076)\pm 1.96\sqrt{\frac{0.07(1-0.07)}{350}+\frac{0.076(1-0.076)}{250} }$

$(0.07-0.076)\pm 1.96\sqrt{4.66896*10^-^4 }$

$(-0.006)\pm 0.042$

$(-0.006)- 0.042=>-0.048$

$(-0.006)+ 0.042=>0.036$

Therefore

Confidence interval is

$-0.048$

Conclusion

Given the confidence interval has zero

Therefore do not reject $H_0:P_1-P_2=0$

6 0

2 years ago

-3x - y = 15<br> y = -8x<br> (x, y) = (0<br> )<br> 9,0

Nataly [62]

<h3>The solution is (x, y) = (3, -24)</h3>

<em><u>Solution:</u></em>

<em><u>Given system of equations are:</u></em>

-3x - y = 15 -------- eqn 1

y = -8x ------ eqn 2

We have to find solution of (x, y)

We can solve by substitution method

<em><u>Substitute eqn 2 in eqn 1</u></em>

-3x - (-8x) = 15

-3x + 8x = 15

5x = 15

Divide both sides by 5

Substitute x = 3 in eqn 2

y = -8(3)

Thus solution is (x, y) = (3, -24)

4 0

2 years ago

Which statement best describes the data set?

julia-pushkina [17]

Answer:it is neither accurate nor precise

Step-by-step explanation:

3 0

2 years ago

A paint company has a specific type of interior paint which costs $5.55 to produce each unit. The company also has a fixed cost

Maurinko [17]

Answer:

Minimum total cost = $20550

maximum revenue $44,100

Step-by-step explanation:

Given data:

Production cost $5.55 per unit

Fixed cost = $15000 per month

Price, p = 42-0.01 q

where. q represent number of unit produced

revenue can be wriiten as

p.q = 42q - 0.01q^2

1) from information 1000 unit has to produced therefore

total cost = 15000 + 5.55×1000 = $20550

Minimum total cost = $20550

2) Revenue = 42q - 0.01q^2

$\frac{d revenue}{dq} = 42q - 2\times 0.01q = 0$

therefore for maximum revenue q is = 2100

so, maximum revenue $= 4.2 \times 2100 - 0.01(2100)^2$

= $44,100

5 0

2 years ago

Zero is _____ a divisor. <br> A: always<br> B: sometimes<br> C: never

spin [16.1K]

Dividing any number by zero gives an indeterminate result.

Its C

4 0

2 years ago

Read 2 more answers