Answer:
z(s) is in the rejection region we reject H₀ μ₁ = μ₂ and support the claim that at CI 95 % the means of the two groups differs
Step-by-step explanation:
Sample 1:
Sise sample n₁ = 115
μ₁ = 169,9 mmHg
σ₁ = 24,8 mmHg
Sample 2:
Sise sample n₂ = 235
μ₂ = 163,3 mmHg
σ₂ = 25,8 mmHg
We can develop a test hypothesis for differences in means to investigate if the mean peak systolic blood pressure differs between these two groups
We will choose CI = 95 % then significance level α = 5 %
α = 0,05 α/2 = 0,025
z(c) for 0,025 is from z-table z(c) = 1,96
Test Hypothesis:
Null Hypothesis H₀ μ₁ = μ₂
Alternative Hypothesis Hₐ μ₁ ≠ μ₂
The alternative hypothesis tells us that the test is a two-tail test.
z(s) = ( μ₁ - μ₂ ) / √ σ₁²/n₁ + σ₂²/n₂
z(s) = ( 169,9 -163,3 ) / √ (24,8)² /115 + ( 25,8)²/235
z(s) = 6,6 / √5,35 + 2,83
z(s) = 6,6 / 2,86
z(s) = 2,30
Comparing |z(c)| and |z(s)|
z(s) > z(c)
z(s) is in the rejection region we reject H₀ μ₁ = μ₂ and support the claim that at CI 95 % the means of the two groups differs
Write an equation of the line with the given slope and y-intercept. slope:-1/4 y-intercept: -1
Answer:
Y = -1/4x -1
Step-by-step explanation:
This is in slope intercept form (y=mx+b)
-1/4 is the slope (m) and -1 is the y intercept (b).
A random sample of fully-grown lobsters has a mean weight of 16 ounces. A researcher
wants to estimate the average weight of all fully-grown lobsters. He finds the margin of
error to be 2.7 ounces for a 90% confidence interval
Answer:
16.79
yes eys yes yes yes .............
What is the value of f(5)?
Answer:
1/2
Step-by-step explanation:
25^(1/2) = 5
A book store has paperback books marked down 25%. What is the total markdown on four books that regularly sell for $8.95,
$9.55, $6.85, and $12.95?
THE TOPIC IS: AREA OF CIRCLES!! PLEASE HELP ME WITH THIS QUESTION!!! WHATS THE ANSWER?? I WILL GIVE YOU BRAINLIEST AND A THANKS!!! AND PLS PUT AN EXPLANATION!! THANK YOU SO MUCHHH!!!
Answer:
3.14cm^2
Step-by-step explanation:
A= πr^2
A= 3.14x1^2
A= 3.14cm^2
This is geometry. thanks for the help!
Answer:
OKay so the answer is about 4 angles. I just did this answer in my geometry class
Step-by-step explanation:
I am going to be so sorry if this is wrong. Because if it is, then there is something seriously wrong with my teacher! :)
i need help finding b
The income of a computer analyst varies directly as the number of hours worked. If the analyst earned $256 for working 8 hours, what is the constant variation?
Answer:
$32 per hour
Step-by-step explanation:
if a person makes $256 per 8 hours then we can divide 256 by 8 so that we get the unit of dollars per hour.
$256/8 hour= $32 per hour
you can write this as k=y/x
which can also be 32=256/8
Plsssssssssssssssss help
Answer:
Minimum=3
lower quartile or quartile 1 =5
Median=7
upper quartile or quartile 3 =9
Maximum=11
The box plot would have would have a line on 3 and on 12. On the end of each line, you on 5 and 9 you put the box. You would put the line on 7. I don't think you need the dots.
Step-by-step explanation:
Minimum and maximum are the lowest and highest. Mean is the middle of the numbers of the data. The quartiles are the means on either side of the mean.
Help i will give the crown thing at the bottom!!!!!!! i know what the crown thing at the bottom is called but everytime i write it said i have to write something nice
Answer:
She can drive 200 miles
Step-by-step explanation:
80 + 0.20x = 120
120 - 80 = 40
40 ÷ 0.20 = 200
x = 200
April colored 12 out of the 16 total pages in her coloring book to find the percentage of the total number of pages that April has she set up the equivalent ratios bellow
12 over 16 = x over y
Can someone help me out?
Answer:
[tex]\frac{3}{4}[/tex]
Step-by-step explanation:
[tex]\frac{12}{16} =\frac{x}{y} \\\\\frac{12}{16} =\frac{3}{4}[/tex]
Divide the numerator and denominator by 4
Find the value of x in the triangle shown below 5 3
Answer: 4
Step-by-step explanation: b =√c² - a ²
=√ 5² - 3 ²
=√16
=4
Find the valid value(s) for x:
x2 +5x+6
= 1
x+3
Answer:
x=-1
Step-by-step explanation:
x+3≠0
x≠-3
x²+5x+6=x+3
x²+5x+6-x-3=0
x²+4x+3=0
x²+x+3x+3=0
x(x+1)+3(x+1)=0
(x+1)(x+3)=0
x+3≠ 0
so x+1=0
x=-1
What is the area of a triangle with vertices (3,0) (9,0) (7,6)
Answer:
The area of the triangle is of 21 units of area.
Step-by-step explanation:
The area of a triangle with three vertices [tex](x_1,y_1),(x_2,y_2),(x_3,y_3)[/tex] is given by the determinant of the following matrix:
[tex]A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|[/tex]
In this question:
Vertices (3,0) (9,0) (7,6). So
[tex]A = \pm 0.5 \left|\begin{array}{ccc}3&0&1\\9&0&1\\7&7&1\end{array}\right|[/tex]
[tex]A = \pm 0.5(3*0*1+0*1*7+1*9*7-0*7*1-0*9*1-3*1*7)[/tex]
[tex]A = \pm 0.5*(63-21)[/tex]
[tex]A = \pm 0.5*42 = 21[/tex]
The area of the triangle is of 21 units of area.
Evaluate this exponential expression.
Y^3/5
Answer:
[tex]y^{\frac{3}{5}} =\sqrt[5]{y^{3} }[/tex]
Step-by-step explanation:
[tex]y^{\frac{3}{5}} =\sqrt[5]{y^{3} }[/tex]
How many students are included in this graph?
Answer:
were the graph at tho?
Step-by-step explanation:
Please somebody help me out
Answer:
x = 10
y = 20
Step-by-step explanation:
They tell you triangle STY is congruent to triangle DTU, which means sides and angles are equal. (they are mirror images in this case)
YT = DT and ST = UT
3y + 5 = 65
3y = 60
y = 20
5x = 50
x = 10
4
What temperature is 23 degrees above
freezing?
If x = 7, then 2x * x =
Answer:
x=7
putting x=7
2×7×7
2×49
98
Answer:
98
Step-by-step explanation:
7 times 2 is 14..
this makes the equation 14×7. this comes out to be 98
8
YA
8
Triangle ABC has vertices A(2,-4), B(0, 0), C(5,0). Graph and label the vertices of ABCD and
its image A'B'C'D' after reflecting across the line x=1. Choose the correct ordered pairs of the
image A'B'C'.
(2 points)
O A'(0, ), B'(-2, 0), C (4,0)
O A'(0, -4), B (2.0), C'(-4,0)
A'(0,0), B (2, 1), C'(4,1)
Answer:
first or second not third
Step-by-step explanation:
One glass of milk provides 305 mg of calcium maggie drinks one glass every morning. How many grams of calcium does maggie get in 14 days
Select the reason why these triangles are
similar. If they are not, select "Not similar."
50°
50°
Answer:
B
Step-by-step explanation:
help me plissssssssssss
Answer: C, 3500
Step-by-step explanation:
Each jump from year to year is multiplying by abt 1.6 (200/124 = 1.62, 322/200 = 1.61, etc.) so to find 1978 you'd multiply 2167 * 1.6
2167 * 1.6 = 3467.2 = closest to 3500
I HATE LINKS PLEASE ANSWER THIS QUESTION NOT WITH LINKS I’LL DO ANYTHING
Answer:
D. store 2 and 4
Step-by-step explanation:
------------
It´s D!
--------
PLEASE HELP!!! ILL GIVE BRAINLIEST !! Which is the correct answer ? 100 POINTS !! EXPLAIN.
Answer:
Vertically angle
this is the relation between angles 5 and 7
hope it helps
An angle measures 162° less than the measure of its supplementary angle. What is the measure of each angle? ( i need two answers please help see the pic)
Answer:
[tex]9^\circ , 171^\circ[/tex]
Step-by-step explanation
If a represents the measure of the angle, then 180 - a is the measure of its supplement. (Supplements add up to 180 degrees.)
The sentence in the problem translates to an equation:
a = (180 - a) - 162
Simplify the right side.
a = 18 - a
Add a.
2a = 18
a = 9
The angle's measure is [tex]9^\circ[/tex]. The supplement is [tex]180^\circ - 9^\circ =171^\circ[/tex]
Use the arc length formula and the given information to find s = 4m , r = 13m ; theta=?
Answer:
Step-by-step explanation:
hello :
the arc length formula is : s = 2πr(θ/360°)
given : s = 4m , r = 13m
2(3.14)(13)(θ/360°)=4 solve for : θ
θ =(4)(360°) /2(3.14)(13)
θ = 1440/81.64
θ =17.7°
Answer:
4/13 rad
Step-by-step explanation:
correct
help me an plz dont put links while answering question
Answer:
i say it is C if not then B
Step-by-step explanation:
Find the slope of each line
Answer:
1/2
Step-by-step explanation:
when finding the slope, your basically finding the unit rate of the rate of change and since the line perfectly goes through the units (1,2) and not going to any other units. it is the slope.
Answer:
GEAWGAE GAEG AEGEWAGA
Step-by-step explanation:
help me please!!!!!!!1
Answer: 340
Step-by-step explanation:
10 x 5 = 50
10 x 5 = 50
10 x 8 = 80
10 x 8 = 80
8 x 5 = 40
8 x 5 = 40
50 + 50 + 80 + 80 + 40 + 40
100 + 160 + 80
340