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3 years ago

Help me please it is easy math

Mathematics

1 answer:

Zanzabum3 years ago

7 0

Answer:you move up by two

Step-by-step explanation:

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A researcher wishes to determine whether people with high blood pressure can lower their blood pressure by performing yoga exerc

Anastaziya [24]

Answer:

90% confidence interval for the difference between the two population means

( -23.4166 , -6.5834)

Step-by-step explanation:

Step(i):-

Given first sample size n₁ = 100

Given mean of the first sample x₁⁻ = 178

Standard deviation of the sample S₁ = 35

Given second sample size n₂= 100

Given mean of the second sample x₂⁻ = 193

Standard deviation of the sample S₂ = 37

Step(ii):-

Standard error of two population means

$se(x^{-} _{1} -x^{-} _{2} ) = \sqrt{\frac{s^{2} _{1} }{n_{1} }+\frac{s^{2} _{2} }{n_{2} } }$

$se(x^{-} _{1} -x^{-} _{2} ) = \sqrt{\frac{(35)^{2} }{100 }+\frac{(37)^{2} }{100 } }$

$se(x^{-} _{1} -x^{-} _{2} ) = 5.093$

Degrees of freedom

ν = n₁ +n₂ -2 = 100 +100 -2 = 198

t₀.₁₀ = 1.6526

Step(iii):-

90% confidence interval for the difference between the two population means

$(x^{-} _{1} - x^{-} _{2} - t_{\frac{\alpha }{2} } Se (x^{-} _{1} - x^{-} _{2}) , x^{-} _{1} - x^{-} _{2} + t_{\frac{\alpha }{2} } Se (x^{-} _{1} - x^{-} _{2})$

(178-193 - 1.6526 (5.093) , 178-193 + 1.6526 (5.093)

(-15-8.4166 , -15 + 8.4166)

( -23.4166 , -6.5834)

4 0

3 years ago

PLEASE HELP!!!!!!!!!!!!!!!!!!!

denis-greek [22]

Answer:

16.2

Step-by-step explanation:

Add all of them p and divide by the total values. SO there are 9 values, you first add the all up and divide by 9. Easy :)

6 0

3 years ago

Find m Geometry help pls

ZanzabumX [31]

Answer:

∠WXY=72°

Step-by-step explanation:

2X-2=70+X

2X-X=70+2

X=72° ⇒ ∠WXY=72°

3 0

3 years ago

What is 200%of 4420

Naddik [55]

Answer:

8,840

Step-by-step explanation:

Multiply 4420 by 200% to get the answer 8840. You can also multiply 4420 by 2 to get the same answer as you would multiplying by 200%.

6 0

3 years ago

Read 2 more answers

Alexander was putting on a theatre show to debut his play. He is charging $2 for child tickets and $5 for adult tickets. His the

Gwar [14]

19 children tickets and 31 adults ticket were sold

2x+5y = 193

Step-by-step explanation:

sold 19 tickets for children $2 = 19×2 = $38

sold 31 tickets for adult $5 = 31×5 = $155

Total debut = $38 + $155 = $193

Total Seats = 19 (children)+ 31 adults) = 50 seats

2x+ 5y = 193 where x denotes children tickets and y denotes adult tickets

2(19)+5(31) =193

(2×19) + (5×31) = 38 + 155 = 193

$(2×19) + (5×31) = 38 + 155 = 193$

6 0

4 years ago