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
sergejj [24]
3 years ago
7

A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores. the hypothesi

s test produces a z-score of z = 2.27. if the researcher is using a one-tailed test, what is the correct statistical decision?
Mathematics
1 answer:
lakkis [162]3 years ago
6 0
AZ tech made to EZ tech. In other words, a z-score.
You might be interested in
Use the properties of 30-60-90 and 45-45-90 triangles to solve for x in each of the problems below. Then decode the secret messa
Tcecarenko [31]

The trigonometric function gives the ratio of different sides of a right-angle triangle. The given problems can be solved as given below.

<h3>What are Trigonometric functions?</h3>

The trigonometric function gives the ratio of different sides of a right-angle triangle.

\rm Sin \theta=\dfrac{Perpendicular}{Hypotenuse}\\\\\\Cos \theta=\dfrac{Base}{Hypotenuse}\\\\\\Tan \theta=\dfrac{Perpendicular}{Base}\\\\\\Cosec \theta=\dfrac{Hypotenuse}{Perpendicular}\\\\\\Sec \theta=\dfrac{Hypotenuse}{Base}\\\\\\Cot \theta=\dfrac{Base}{Perpendicular}\\\\\\

where perpendicular is the side of the triangle which is opposite to the angle, and the hypotenuse is the longest side of the triangle which is opposite to the 90° angle.

1st.) x = 5 /Sin(30°)

x = 10

!) sin(45°) = 4/x

x = 4/sin(45°)

x = 4√2

I) Cos(45°) = √3 / x

x = √3 / Cos(45°)

x = √6

E) Tan(60°) = 3√3 / x

x = 3√3 / 3

W) For isosceles right-triangle, the angle made by the legs and the hypotenuse is always 45°.

x = 45°

N) x² + x² = (7√2)²

x = 7

V) Tan(60°) = 7 / x

x = 7√3/3

K) x² + x² = (9)²

x = 9/√2

Y) Sin(60°) = 7√3/x

x = 14

M) Sin(30°) = x/11

x = 11/2

T) Sin(45°) = x/√10

x = √5

A) x + 2x + 90° = 180°

x = 30°

O) Sin(45°) = √2 / x

x = 2

R) Tan(30°) = x / 4

x = 4/√3 = 4√3 / 3

S) Sin(60°) = x / (10/3)

x = 5√3 / 3

Learn more about Trigonometric functions:

brainly.com/question/6904750

#SPJ1

8 0
2 years ago
A company wishes to manufacture a box with a volume of 2424 cubic feet that is open on top and is twice as long as it is wide. f
olganol [36]
<span> Let x = the width 
 Let 2x = the length
 Let h = the height
 </span>then vol = x*2x*h. So we have 2x^2*h = 24
 h=24/(2*x^2)=12/x^2
 Surface area: two ends + 1 bottom + 2 sides (no top)
 S.A. = 2(x*h) + 1(2x*x) + 2(2x*h)
 S.A. = 2xh + 2x^2 + 4xh<span> S.A. = 2x^2 + 6xh
 </span>Replace h with  12/x^2
 S.A = 2x^2 + 6x(12/x^2)
 S.A = 2x^2 + 6(12/x)
 S.A = 2x^2 + (72/x)
 Graph this equation to find the value of x for minimum material
 Min surface area when x = 3.0 is the width<span> then
 </span>2(3) = 6 is the length
 Find the height:
 h=12/(3.0)^2
 h=1.33
 Box dimensions for min surface area: 3.0 by 6 by 1.33; much better numbers
 Check the vol of these dimensions: 3.0*6*1.33 ~ 24
 graphic attachment

3 0
3 years ago
Find the measure of the angle indicated in bold, which is 20x+5
Vikki [24]
24x-1+20x+5=180
44x+4=180
44x=176
x=4

Therefore, 20x+ 5 is equivalent to 20(4)+5
20(4)+5
80+5
85

Hope this helps :)
6 0
3 years ago
Write the equation in slope-intercept form. Y+5= -6(x+7)
Nata [24]

y + 5 = -6x - 42

y = -6x -47

3 0
3 years ago
The function h(t)=-4.92t^2+14.69t+575 is used to model an object being tossed from a tall building, where h(t) is the height in
Scilla [17]
Given that equation modelling the height of the building is given by:
<span>h(t)=-4.92t^2+14.69t+575
plotting the equation (see the plot below)
The domain in all real numbers.

</span>Range: (h∈R: 196800h≤115317961)

3 0
4 years ago
Read 2 more answers
Other questions:
  • Orders for a computer are summarized by the optional features that are requested. The proportion of orders with no optional feat
    11·1 answer
  • I don’t understand number 5
    12·1 answer
  • Please I need help !!
    6·2 answers
  • What is 65 divided by 1.5
    7·2 answers
  • The formula for the perimeter of a rectangle is p=2l 2w.
    11·1 answer
  • What is the same as 3(4 + 5 + 6)?
    7·1 answer
  • What is the product of -8 and -7
    8·2 answers
  • What is the median of the set of data 928, 834, 842, 841, 932, 917, 892, 856, 908, 867, 873, 868, 872, 921, and 924?
    8·1 answer
  • 1. Ishaya and Bryan are team captains and are very competitive. For every free throw Ishaya makes, Bryan makes 2 free throws. If
    15·1 answer
  •  find the equation of the line that is parallel to the line Y equals 3X -6 and passes through the points (1 -8). Write the equa
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!