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kari74 [83]
3 years ago
9

​Plasma-glucose levels are used to determine the presence of diabetes. Suppose the mean ln​ (plasma-glucose) concentration(mg/dL

) in​ 35- to​ 44-year-olds is 4.86 with standard deviation​ = 0.54. A study of sedentary people is planned to test whether they have a​ different, i.e., a​ two-tailed test, level of​ plasma-glucose than the general population. The study will test significance at the 0.05 level. One study indicated that that the mean for the sedentary group will be about 4.96​ mg/dL. How many sedentary people are needed in the study to achieve​ 80% power?
Mathematics
1 answer:
sammy [17]3 years ago
8 0

Answer:

a) 0.4571

b)  How many sedentary people are needed in the study to achieve​ 80% power? = 229

Step-by-step explanation:

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Help 15 points!!!!!!!!!!!!!!!!!!!!!
Svetllana [295]

Answer:

see explanation

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan A = \frac{opposite}{adjacent} = \frac{BC}{AC} = \frac{7}{8} , then

∠ A = tan^{-1} (\frac{7}{8} ) ≈ 41° ( to the nearest degree )

The sum of the angles in the triangle = 180° , then

∠ B + 41° + 90° = 180°

∠ B + 131° = 180° ( subtract 131° from both sides )

∠ B = 49°

Using Pythagoras' identity in the right triangle

AB² = BC² + AC² = 7² + 8² = 49 + 64 = 113 ( take square root of both sides )

AB = \sqrt{113} ≈ 10.6 ( to the nearest tenth )

3 0
2 years ago
Anybody know the answer I need help. Please
Evgen [1.6K]

Answer:

  \dfrac{p^2+9p+2}{p^2-49}

Step-by-step explanation:

Problems like this require that you recognize that the denominator of the right term is a factor of the denominator of the left term. That is, you're supposed to know how to recognize and factor the difference of two squares.

  \dfrac{5-p}{49-p^2}+\dfrac{p+1}{p-7}=\dfrac{p-5}{p^2-49}+\dfrac{p+1}{p-7}\\\\=\dfrac{p-5}{(p-7)(p+7)}+\dfrac{p+1}{p-7}\cdot\dfrac{p+7}{p+7}\\\\=\dfrac{(p-5)+(p+1)(p+7)}{(p-7)(p+7)}=\dfrac{p-5+p^2+8p+7}{p^2-49}=\dfrac{p^2+9p+2}{p^2-49}

8 0
3 years ago
Frank bought three magazines for $18.90 and six candy bars for $6.30. How much did he spend?​
yuradex [85]

Answer:

$18.90 + $6.30 = $25.20

Step-by-step explanation:

3 0
3 years ago
What is the area of the pentagon
vlada-n [284]
The area of the pentagon is 140
3 0
3 years ago
Read 2 more answers
What does 9740399 round to by the nearest hundred thousand?
weeeeeb [17]
1,000,000 because since it is 100,000 the closest number is 1,000,000
7 0
2 years ago
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