Answer:
The product of 7 and y is 7y.
Step-by-step explanation:
You are interested in the psychological implications of high SES. You read a paper that claims that higher social class people behave more unethically. The paper reports a significant difference in the propensity of high and low SES people behaving unethically. The significance level of this study was 0.05, the ratio of true to false effects in this field is 0.35, but the author was anxious to issue a press release and prepare his TED talk, so power is low, at 0.1. The probability that this study reports a real effect is
Answer:
Option C. The real effect is 0.1
Step-by-step explanation:
The complete question is
You are interested in the psychological implications of high SES. You read a paper that claims that higher social class people behave more unethically. The paper reports a significant difference in the propensity of high and low SES people behaving unethically. The significance level of this study was 0.05, the ratio of true to false effects in this field is 0.35, but the author was anxious to issue a press release and prepare his TED talk, so power is low, at 0.1. The probability that this study reports a real effect is
A. 0.58
B. 0.95
C. 0.1
D. 0.35
E. 0.41
Solution
Ratio of true to false effects i.e T/F = 0.35
The power of the study indicates the real effect of the study and hence despite the true/false ration being 0.35 and the significance level of study is 0.05, the real effect of the study would be 0.1
Hence option C is correct
The table below represents which equation ?
Answer:
D
Step-by-step explanation:
Find the slope by picking two ordered pairs in the table and using the slope formula( y2-y1/x2-x1) to get the slope. The smallest numbers are easiest to work with. (-1,1), (0,-2)
-2-1/0-(-1) = 3/0+1 = -3/1 = m=-3
Use one of the points you used and plug in the x and y values of the ordered pair into the equation with the slope to find your b( y-intercept). (0,-2)
-2= -3(0) +b
-2= 0+b
b=-2
The final equation will only have your slope and b( y-intercept). That should be your answer. Hope this helps!
Final Equation: y=-3x-2
On a map, 1 inch equals 15 miles. Two cities are 2 inches apart on the map. What is the actual distance between the cities?
A classroom has a perimeter of 62.25m. What is the absolute error of the perimeter?
0.005m
Step-by-step explanation:Measuring properties of a given entity is always prone to error and hence leads to inaccuracy in the resulting measurement. One of such errors is the absolute error.
Absolute error is the difference between the actual/exact value and measured value.
The classroom has been measured to have a perimeter of 62.25m. This shows that it is accurate to 0.01 of a meter. This means that the actual measurement of the classroom could either be 0.005m more or less than the measured value.
In other words, the actual value of the classroom is
62.25 ± 0.005 m
This difference of 0.005 m gives the absolute error.
an are whose measure is exactly 180°
Answer:
Mmeasure is exactly 180°
semi-circle because the measure of a whole circle is 360°.
Arc :
The arc of a circle consists of two points on the circle and all of the points on the circle that lie between those two points. It's like a segment that was wrapped partway around a circle. An arc is measured not by its length (although it can be, of course) but most often by the measure of the angle whose vertex is the center of the circle and whose rays intercept the endpoints of the arc. Hence an arc can be anywhere from 0 to 360 degrees.
(2v-3u)-(v-4u)+(v+4u)
Answer:
2v + 5u
Step-by-step explanation:
Practice:
Determine the coordinates of the point on the unit circle corresponding to the given central angles. if necessary, round your results to the nearest hundredth.
215°
a. (-0.82, 0)
b. (-0.57, -0.82)
c. (-0.82, -0.57)
d. (1, -0.57)
Please select the best answer from the choices provided
Answer:
C. (-0.82, -0.57)
Step-by-step explanation:
I calculated it logically
What is the domain of the following parabola?
Nicholas wants to buy a laptop that costs $485.30. He has $186.80 in savings. How
much does he have to save each month if he wants to buy the laptop in three more
months?
F $99.50
G $92.30
H $87.50
$90.50
Find two numbers a and b whose sum a+b is -3 and whose difference a−b is -5
Answer:
A=-4, b=1
Step-by-step explanation:
add those two function together u will got:
a+b+(a-b)=-3+(-5)
2a=-8
A=-4
-4+b=-3
B=1
plz answer this question without putting links or files
Answer:
(6,14) (7,16) (8,18)
Step-by-step explanation:
The x values are going up by one, while the y values are going up by 2.
what's the slope for coordinates (-5,-5) (5,3)?
Answer:
4/5
Step-by-step explanation:
slope = (difference in y)/(difference in x)
slope = (-5 - 3)/(-5 - 5)
slope = -8/(-10)
slope = 4/5
he wait time (after a scheduled arrival time) in minutes for a train to arrive is Uniformly distributed over the interval [0,15]. You observe the wait time for the next 95 trains to arrive. Assume wait times are independent. Part a) What is the approximate probability (to 2 decimal places) that the sum of the 95 wait times you observed is between 670 and 796
Answer:
81.74% probability that the sum of the 95 wait times you observed is between 670 and 796
Step-by-step explanation:
To solve this question, the uniform probability distribution and the normal probability distribution must be understood.
Uniform distribution:
A distribution is called uniform if each outcome has the same probability of happening.
The distribution has two bounds, a and b.
Its mean is given by:
[tex]M = \frac{b - a}{2}[/tex]
Its standard deviation is given by:
[tex]S = \sqrt{\frac{(b-a)^2}{12}}[/tex]
Normal distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
n instances of the uniform distribution can be approximated to the normal with [tex]\mu = nM[/tex], [tex]\sigma = S\sqrt{n}[/tex]
Uniformly distributed over the interval [0,15].
This means that:
[tex]M = \frac{15 - 0}{2} = 7.5[/tex]
[tex]S = \sqrt{\frac{(15-0)^2}{12}} = 4.33[/tex]
95 trains
[tex]n = 95[/tex], so:
[tex]\mu = 95M = 95*7.5 = 712.5[/tex]
[tex]\sigma = S\sqrt{n} = 4.33\sqrt{95} = 42.2[/tex]
What is the approximate probability (to 2 decimal places) that the sum of the 95 wait times you observed is between 670 and 796?
This is the pvalue of Z when X = 796 subtracted by the pvalue of Z when X = 670. So
X = 796
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{796 - 712.5}{42.2}[/tex]
[tex]Z = 1.98[/tex]
[tex]Z = 1.98[/tex] has a pvalue of 0.9761
X = 670
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{670 - 712.5}{42.2}[/tex]
[tex]Z = -1[/tex]
[tex]Z = -1[/tex] has a pvalue of 0.1587
0.9761 - 0.1587 = 0.8174
81.74% probability that the sum of the 95 wait times you observed is between 670 and 796
Which values make this equation true?
√m + √n = √p
Answer:
all Real numbers?
Step-by-step explanation:
with each pair of (m;n) we have one value of p
A professor of women's studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stress-free environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained.
High stress 20 23 18 19 22
Relatively stress free 26 31 25 26 30
1. The obtained value of the appropriate statistic is ____.
A. tobt = -4.73.
B. tobt = -4.71.
C. tobt = -3.05.
D. tobt = -.047.
2. The df for determining tcrit are ____.
A. 4.
B. 9.
C. 8.
D. 3.
3. Using a = .052 tail, tcrit = ____.
A. +- 2.162.
B. +- 2.506.
C. +- 2.462.
D. +- 2.306.
4. Using a = .052 tail, your conclusion is ____.
A. Accept H0; stress does not affect the menstrual cycle.
B. Retain H0; we cannot conclude that stress affects the menstrual cycle.
C. Retain H0; Stress affects the menstrual cycle.
D. Reject H0; stress affects the menstrual cycle.
Answer:
-4.73
8
±2.306
D. Reject H0; stress affects the menstrual cycle.
Step-by-step explanation:
Samples:
High stress 20 23 18 19 22
Relatively stress free 26 31 25 26 30
Using calculator :
Mean, x1 = 20.4 ; n = 5 ;
Standard deviation, s1 = 2.07
Mean, x2 = 27. 6; n = 5 ;
Standard deviation, s2 = 2.70
The test statistic :
(x1 - x2) / sqrt[(s1²/n1 + s2²/n2)]
(20.4 - 27.6) /sqrt[(2.07²/5 + 2.7²/5)]
-7.2 / 1.523 = - 4.73
Df = n1 + n2 - 2
df = 5 + 5 - 2 = 8
From t-value distribution :
df = 8 ; α = 0.052
Tcritical = +- 2.306
|Tstatistic | > | Tcritical | ; Reject H0
The height of a triangle is 7 ft more than its base. If the area of the triangle is 30 ft2, what is the length of the base?
2 ft
5 ft
9 ft
12 ft
Answer:
see below
Step-by-step explanation: 5 27 7 16
area = 1/2 bh
height of a triangle is 7 ft more than its base
base = b
height = b + 7
area = 30
area = 1/2 b(h)
30 = 1/2 b(b + 7)
30 = 0.5(b²+ 7b)
30 = 1/2 b²+ 3.5b solve for b
1/2 b²+ 3.5b = 30
1/2 b²+ 3.5b - 30 = 0
b²+ 7b - 60 = 0 factor
(b +12)(b - 5) = 0 when b = -12 or 5 base length can't be negative
b = base = 5
area = 1/2 bh 1/2×2(9) = 9
area = 1/2 bh 1/2×5(12) = 60
area = 1/2 bh 1/2×9(16) = 56
area = 1/2 bh 1/2×12(19) = 114
Como sacar una taza de porcentaje
Answer:
La tasa de porcentaje resulta de la división del valor de porcentaje (el dividendo) entre el valor base (el divisor) multiplicado por 100 %.
will the area be the same or different?
a newspaper carrier can deliver 240 newspapers in 3 hours. How long would it take the newspaper carrier to delivef 160 newspapers?
Answer:
2 hours
Step-by-step explanation:
Make a ratio. If 240 newspapers can be delivered in 3 hours, 160 newspapers can be delivered in how many hours.
240/160 = 3/x
Okay now, multiply 160 times 3 and that would equal 480. Next do 480 divided by 240 and you get 2. So the answer is 2 hours!
Hope this helped!! :)
F(x)=9x+5, find f^-1(x).
Answer:
interchange the role of x and y
x=9y+5
x-5=9y
x-5 =y
9
so,f^-1(x)= x-5
9
hope it helps.
stay safe healthy and happy.( NEED HELP ASAP )
Drews fish tank measures 32 cm by 22 cm by 26 cm. He pours 20 liters of water into it, and some overflows the tank. Find the volume of water, in milliliters, that overflows.
Answer:
the answer to the question is 1,696
Step-by-step explanation:im sorry i dont have an exsplanation but its that trust me
9 – 3 (2+6)÷6 -2 × 5? step by step please
Can somebody help me
please help !! i’ll give 5 stars if help.
Answer:
true
Step-by-step explanation:
there are two x-intercepts
Two trains leave stations 456 miles apart at the same time and travel toward each other. One train travels at 105 miles per hour while the other travels at 105miles per hour. How long will it take for the two trains to meet?
Answer:
let x=distance 105 mph train traveled
(456-x)=distance 85 mph train traveled
Travel time = distance/speed (equal in both directions)
x/105=(456-x)/85
85x=105*456-105x
190x=105*456
x=105*456/190=252 miles
travel time=252/105=2.4 hrs
ans:
The two trains will meet in 2.4 hrs
Step-by-step explanation:
there brainliest pls
Can someone help me with this ?
Formula to find commission
A commission is a percentage of total sales,
multiply the rate of commission by the total sales
Emma has $x in her bank account. Jonah has $40 more than twice as much as Emma in his bank
account. Together they have $760. Write and solve an equation to determine how much money Emma
has in her bank account.
Answer:
$240
Step-by-step explanation:
We can set this up by making an equation: x + 2x + 40 = 760.
Now we can solve.
x + 2x + 40 = 760 (combine like terms (x))
3x + 40 - 40 = 760 - 40 (subtract 40 from both sides)
3x / 3 = 720 / 3 (divide by 3 to isolate x)
x = 240
Because Emma has $x, she has $240 in her bank account.
You can check this by substituting this value for x in our original equation.
Find RS.
R
S
22
X
Q
T
26
I don’t know how to do this one.
Answer:
RS is about 18.615
Step-by-step explanation:
since XY is the midsegment, it is parallel to the other 2 lines. That also makes the lines proportional
[tex]\frac{22}{26} =\frac{x}{22}[/tex]
cross multiple
484=26x
x= 18.615
QUESTION 1 of 10: Many companies use cloud-based, automated accounting systems to implement the principles of T-accounts. A vendor
tries to sell you a subscription at $40 per user per month. You need 3 users to access the system. What will your annual cost be?
ОООО
a) $40
Ob) $120
C) $360
d) $1,440
