1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
netineya [11]
3 years ago
12

Suppose systolic blood pressure of 17 year female is approximately distributed with a mean of 118mmHg and a standard deviation o

f 12mmhg... A) what is the proportion of girls would you expect to have blood pressure between 112mmHg and 124mmHg... B) if you were to select a sample of 16 girls and obtain systolic blood pressure, what proportion of such sample would you expect between 112 mmHg and 124mmHg​
Mathematics
1 answer:
Artemon [7]3 years ago
8 0

Answer:

a) 0.383

b) 0.375

Step-by-step explanation:

a) Calculate each z-score.

z = (x − μ) / σ

z₁ = (112 − 118) / 12 = -0.5

z₂ = (124 − 118) / 12 = 0.5

Use a calculator or z-score table to find the probability.

P(-0.5 < Z < 0.5) = 0.6915 − 0.3085 = 0.383

b) 0.383 × 16 ≈ 6.  So the expected proportion would be 6/16 = 0.375.

You might be interested in
Describe a pattern you notice when adding the sums of fractions with even denominators as opposed to those with odd denominators
GuDViN [60]
When adding fractions with even denominators, you will not get a whole number, there will be a 1/2. When adding fractions with odd denominators there will be a whole number.
8 0
3 years ago
Read 2 more answers
11 feet 8inches + 2 feet 9 inches
hjlf

the asnwer is 14 feet 5 inches because you add feet and then inches

8 0
3 years ago
Read 2 more answers
12 is to 60 as 5 is to ?
Elina [12.6K]
12:60 equals to 5:25
4 0
3 years ago
At the Foremost State Bank the average savings account balance in 2012 was $1900. A random sample of 45 savings account balanes
lakkis [162]

Answer:

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Mean of the Population = 1900

Given random sample size 'n' =  45

Mean of the sample x⁻ = 1000

Standard deviation of the sample = 225

<u><em>Null Hypothesis</em></u>:-

There is no difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012.

<u><em>Alternative Hypothesis</em></u> :-

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

<u><em>Step(ii</em></u>):-

Test statistic

        t = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }

        t = \frac{1000-1900 }{\frac{225}{\sqrt{45} } }

       t = -900 /33.54 = -26.517

      |t| = |-26.517|=26.517

Degrees of freedom

                       γ = n-1 = 45-1 =44

t₍₀.₀₁ , ₄₄₎ = 2.326

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

4 0
2 years ago
How to convert 750 in ^3 to yd^3
____ [38]

\bf \stackrel{\textit{we know that }}{1yd=36in}\implies \stackrel{\textit{therefore}}{(1yd)^3=(36in)^3}\implies \stackrel{\textit{distributing the exponent}}{1^3yd^3=36^3in^3}\\\\\\1yd^3=46656in^3~\hspace{8em}therefore\\\\\\750 \underline{in^3} \cdot \cfrac{1yd^3}{46656 \underline{in^3}}\implies \cfrac{750 yd^3}{46656}\implies \cfrac{125 yd^3}{7776}~~~~\approx~~~~ 0.016075~yd^3

5 0
3 years ago
Other questions:
  • I need help on number 2 please help me. Thanks. Happy holidays
    7·1 answer
  • Kevin operates a movie theater that sells about 800 tickets per day for $8 each. Kevin predicts that for each $0.50 increase in
    5·1 answer
  • What measures spread?
    10·2 answers
  • Factor the following polynomial completely.<br><br>y squared plus 5 zy plus 4 z squared<br><br>​
    14·1 answer
  • Solve 2^x =3 round to the nearest ten-thousand
    9·2 answers
  • If mJL = 5.<br> then mML=
    12·1 answer
  • Plsss help highschools mathematics
    8·1 answer
  • Help with this question please and thanks in advance
    11·1 answer
  • 952,832,744 what digit is the 5 in
    10·1 answer
  • 35-{15-(19+5)÷3 simplify​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!