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uysha [10]
2 years ago
12

Is it ok if somone answers this for me :)...? (−12)(−5)

Mathematics
2 answers:
mina [271]2 years ago
6 0
I think it’s going to be 60
Leona [35]2 years ago
3 0

Answer:

( - 12) \times ( - 5) = \boxed{60}✓

<h3><u>60</u> is the right answer.</h3>
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A study was conducted to determine whether an expectant mother's cigarette smoking has any effect on the bone mineral content of
svp [43]

Using Hypothesis testing,

a) Two samples are independent.

b)H₀: an expectant mother's cigarette smoking has any not effect on the bone mineral content of her otherwise healthy child.

Hₐ : an expectant mother's cigarette smoking has any effect on the bone mineral content of her otherwise healthy child.

c) Null hypothesis is accepted.

so, an expectant mother's cigarette smoking has no effect on the bone mineral.

We have given that,

A study which is conducted for check an expectant mother's cigarette smoking has any effect on the bone mineral content of her otherwise healthy child.

For new-born whose mother's cigarette smoking

sample size , n₁= 77

X-bar, x₁-bar = 0.098 g/cm

standard deviations, s₁ = 0.026 g/cm

For new-born whose mother did not cigarette smoking

sample size , n₂ = 161

standard deviations, s₂ = 0.025 g/cm.

mean (X-bar) , x₂-bar = 0.095 g/cm

a) the two samples are independent since they are different types of mothers, smoking mothers and non smoking mothers

b)H₀: an expectant mother's cigarette smoking has any not effect on the bone mineral content of her otherwise healthy child.

Hₐ: an expectant mother's cigarette smoking has any effect on the bone mineral content of her otherwise healthy child.

c) Test statistic:

t = (x₁-bar - x₂-bar )/S (√1/n₁+1/n₂)

where , S = √(s₁²(n₁ - 1) + s₂²(n₂ -1))/n₁+n₂ - 2

S = √((0.026)²(76) +(0.025 )²(160))/236

= 0.0253

then, t = (0.098 - 0.095 )/0.0253(√1/77 +1/161 )

=> t = 0.859

Using the critacal table critical t is

Critical t = ±1.970065

Degrees of freedom =236.0000

P-Value=0.3935 which is greater than α(0.05),

So , we accept H₀

Thus, an expectant mother's cigarette smoking has not effect on the bone mineral content of her otherwise healthy child.

To learn more about Hypothesis testing, refer:

brainly.com/question/4232174

#SPJ4

8 0
1 year ago
the circumference of a circular painting is 40.82 ft. what is the radius of the painting? use 3.14 do not round
diamong [38]
Your answer would be about 20.41
7 0
3 years ago
What is this number in standard form? <br> (8×100)+(4×1)+(6×1100)+(3×11,000)
Korvikt [17]

Answer:

40404

Step-by-step explanation:

is this helpful????

5 0
2 years ago
Read 2 more answers
If five notebooks cost $5.25, how much would three notebooks cost? Show your work
nignag [31]
Easy just do )5.25 +$5.25+$5.25 witch equals $15.75 YAY
6 0
3 years ago
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What is the factor pair of 9
den301095 [7]
1 x 9, 3 x 3, 9 x 1

1 and 9 are a factor pair of 9 since 1 x 9= 9

3 and 3 are a factor pair of 9 since 3 x 3= 9

9 and 1 are a factor pair of 9 since 9 x 1= 9

5 0
2 years ago
Read 2 more answers
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