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labwork [276]
2 years ago
8

A study was conducted on the effects of long-term marriage (more than 10 years). Researchers gathered data from a random sample

of 4,563 adults and measured quite a few variables, in addition to the explanatory variable of marriage and the response variable of longer life span. According to a newspaper article summarizing the study, those in long-term marriages were more likely to be more physically active, at a healthy weight, and nonsmokers. Those who were not married were about 20% more likely to be deceased. What conclusion can we draw from this study
Mathematics
1 answer:
Vanyuwa [196]2 years ago
5 0

Answer:

We cannot infer a cause and effect relationship because the treatments imposed were not blocked correctly.

Step-by-step explanation:

The treatments given to the groups given in the question where not assigned proper treatments to establish proper randomized block design.

Thus, we can say the conclusion is that we can't truly infer a cause and effect relationship as the blocks were not properly done.

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Conor has a roll of fence that is 25 feet long. He needs 8 yards of fence to go around a flower bed. Does he have enough fence t
vlabodo [156]

Answer:

Yes he has enough fence to go round the flower bed.

Step-by-step explanation:

1 yard = 3 feet

25 feet = 25/3 = 8.33 yards

Yes he has enough fence to go round the flower bed.

8 0
2 years ago
An epidemiologic survey of roller-skating injuries in Metroville, a city with a population of 100,000 (during the midpoint of th
Ahat [919]

Answer: c. \dfrac{90}{1800}\times100\%

Step-by-step explanation:

As per given , we have

Total number of residents injured from roller-skating =1,800

Total number of deaths from roller-skating = 90

Formula for Mortality rate : Mortaility\ rate= \dfrac{Deaths\ due \ to\ injury}{Tota\ injuries}

Then, the proportional mortality ratio (%) due to roller-skating was

=\dfrac{90}{1800}\times100\%

= 5%

Hence, the correct answer is c.\dfrac{90}{1800}\times100\%

8 0
2 years ago
Nathan is planning to ride his bike for 24 minutes.
Thepotemich [5.8K]

Answer:

who is nathan

Step-by-step explanation:

do u know her

3 0
2 years ago
Read 2 more answers
Neal buys a board game. He pays for the board game and pays \$1.54$1.54dollar sign, 1, point, 54 in sales tax. The sales tax rat
Stella [2.4K]

Answer:

$1.46

Step-by-step explanation:

To find the original price of the game, write a proportion. $1.54 is the amount after a 5.5% tax rate. This means he paid 105.5% on the original price.

\frac{1.54}{y}=\frac{105.5}{100}

Find y by cross multiplying numerator and denominator of each fraction.

1.54(100) = 105.5y

154 = 105.5y

1.46 = y

3 0
2 years ago
Read 2 more answers
Three ships, A, B, and C, are anchored in the atlantic ocean. The distance from A to B is 36.318 miles, from B to C is 37.674 mi
skelet666 [1.2K]

Let us draw the triangle

here the sides a= 37.674 miles

b= 11.164 miles

c= 36.318 miles

Lets use the cosine rule to solve for the angles

( we cannot use the sine law since we do not have the measure of any of the angles)

The cosine law

c^{2} = a^{2} +b^{2} -2ab cos C

Let us plug in the values

(36.318)^{2}  = (37.674)^{2} + (11.164)^{2} - 2(37.674)(11.164). Cos C

1318.997 = 1419.33 + 124.634 - 841.184. Cos C

1318.997 = 1543.964  - 841.184. Cos C

841.184. Cos C = 1543.964-1318.997

841.184. Cos C = 224.967

Cos C = \frac{224.967}{841.184}

cos C = 0.267

C = 74.48°

We can use the sine law to calculate the value of angle A

\frac{a}{SinA} = \frac{c}{Sin C}

\frac{37.674}{Sin A} = \frac{36.318}{Sin 74.48}

Sin A = \frac{37.674. sin 74.48}{36.318}

Sin A = \frac{37.674 X 0.963}{36.318}

Sin A = 0.998

A= sin^{-1} (0.998)

A = 87.38°

Now we can easily find the third angle B by subtracting angle A and C from 180°

B = 180-(74.48 + 87.38)

B = 180-161.86

B = 18.14°

Hence we have all the three angles ( attached figure)

7 0
2 years ago
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