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Leno4ka [110]
1 year ago
5

Draw a

Mathematics
1 answer:
valentinak56 [21]1 year ago
3 0

Answer: B

Step-by-step explanation:

The maximum is 100 and the minimum is 27.

  • The only option that shows this is B.
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Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman. Use a 0.05 s
pantera1 [17]

Answer:

The p value is lower than the significance level given \alpha=0.05, so then we can conclude that we can reject the null hypothesis that no difference between the two measures. So there is a significant difference between the measurements from the two arms.

Step-by-step explanation:

We assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal. So for this case is better apply a paired t test.  

A paired t-test is used to compare two population means where you have two samples in  which observations in one sample can be paired with observations in the other sample. For example  if we have Before-and-after observations (This problem) we can use it.  

Let put some notation  

x=test value with right arm , y = test value with left arm

x: 102, 101, 94, 79, 79  

y: 175, 169, 182, 146, 144  

The system of hypothesis for this case are:

Null hypothesis: \mu_y- \mu_x = 0

Alternative hypothesis: \mu_y -\mu_x \neq 0

The first step is calculate the difference d_i=y_i-x_i and we obtain this:

d: 73, 68, 88, 67, 65

The second step is calculate the mean difference  

\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{361}{5}=72.2

The third step would be calculate the standard deviation for the differences, and we got:

s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =9.311

The 4 step is calculate the statistic given by :

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{72.2 -0}{\frac{9.311}{\sqrt{5}}}=17.339

The next step is calculate the degrees of freedom given by:

df=n-1=5-1=4

Now we can calculate the p value, since we have a two tailed test the p value is given by:

p_v =2*P(t_{(4)}>17.339) =6.49x10^{-5}

The p value is lower than the significance level given \alpha=0.05, so then we can conclude that we can reject the null hypothesis that no difference between the two measures. So there is a significant difference between the measurements from the two arms.

8 0
2 years ago
a savings account balance is compounded continuously. If the interest rate is 3.1% per year and the current balance is $1077.00,
enot [183]

Answer:

10.55 years

Step-by-step explanation:

In order to calculate the number of years, you have to isolate N from the formula:

FV=PV*(1+I)^N

FV= Future value

PV= Present value

i= Interest rate

N= number of periods

FV/PV=(1+i)^N

ln(FV/PV)=Nln(1+i)

N=ln(FV/PV)/ln(1+i)

Now you have to replace the formula to find the answer:

FV= 1486.73

PV= 1077

i= 3.1%

N= ln(1486.73/1077)/ln(1+0.031)

N= ln(1.38)/ln(1.031)

N= 10.55

The answer is that it will take 10.55 years for the balance to reach $1486.73.

4 0
2 years ago
Circuference and area of a circle PLEASE HELP
GalinKa [24]

Answer:

Area=12.56

Circumference= 12.56

Step-by-step explanation:

Area formula is \pi r^{2}

Circumference is 2\pi r

8 0
3 years ago
Read 2 more answers
Triangle ABC has side lengths: AB = 3.5 cm, BC = 2.4 cm, and AC = 4.2 cm ΔABC ≅ ΔHJK What is the length of side HJ?
Nadya [2.5K]
ANSWER: 3.5, if both triangles are congruent then HJ should be the same length as AB.
5 0
3 years ago
Please can i have some with the question attached thanks.
ozzi

Answer:

13/6

Step-by-step explanation:

6/13 * x = 1

Multiply each side by 13/6

6/13 * 1/3 6  * x = 1 * 13/6

x = 13/6

7 0
3 years ago
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