A teacher is interested in performing a hypothesis test to compare the mean math score of the girls and the mean math score of the boys. She randomly selects 10 girls from the class and then randomly selects 10 boys. She arranges the girls' names alphabetically and uses this list to assign each girl a number between 1 and 10. She does the same thing for the boys. a. Paired t-test. Since there are 10 boys and 10 girls, we can link the two samples.
b. Paired t-test. Since the boys and girls are in the same class, and are hence dependent samples, they are can be linked.
c. 1-sample t-test. The teacher should compare the sample mean for the girls against the population mean for the boys.
d. Two-sample t-test. There is no natural pairing between the two populations.
Answers
Answer:
d. Two-sample t-test. There is no natural pairing between the two populations.
Step-by-step explanation:
A two-sample t - test is a test performed on the data of two random samples, each independently obtained from a different given population. The purpose of the test is to determine whether the difference between these two populations is statistically significant.
Independent samples are samples that do not affect one another. The mean math scores of the samples of boys and girls do not affect each other. They are independent samples, hence the correct test procedure is two - sample t - test
Related Questions
Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: seven percentage points, confidence level 95%, from a prior study,^p is estimated by the decimal equivalent of 42%n=_____ (round to the nearest integer.)
The factors of m2 + 12m + 35 are
What is the solution to the equation? 8q + 4 = 20 q = 2 q = 4 q = 16 q = 24
Find angle x on the given figure
Answers
Answer:
False. Trapezoids and parallelograms are both types of quadrilaterals. 4 sided figures. The sum of a quadrilateral's angles is always equal to 360. The sum of a trapezoid's angles, as well as the sum of a parallelogram's angles, will always be equal. I hope this answers your question.
Step-by-step explanation:
Answers
Answer:
C) diagonal = 5√2
Step-by-step explanation:
diagonal² = 5² + 5²
diagonal² = 50
diagonal = √50
diagonal = √25x2
diagonal = 5√2
Answer:
C) diagonal = 5√2
Step-by-step explanation:
diagonal² = 5² + 5²
diagonal² = 50
diagonal = √50
diagonal = √25x2
diagonal = 5√2
Answers
9514 1404 393
Answer:
3/10
Step-by-step explanation:
(3/8)/(1 1/4) = (3/8)/(5/4) = (3/8)/(10/8) = 3/10
The quotient for the given fractions is .
The given fractions are and
.
Dividing fractions is nothing but multiplying the fractions by reversing one of the two fraction numbers or by writing the reciprocal of one of the fractions. By reciprocal we mean, that if a fraction is given as , then the reciprocal of it will
.
Here,
divided by
Therefore, the quotient for the given fractions is .
Learn more about the division of fractions here:
brainly.com/question/17205173.
#SPJ3
Question 3 options:
A)
29.32 and 3.97
B)
32.27 and 4.57
C)
27.48 and 5.20
D)
No Solution
Answers
Answer:
The closest choice is ...
C) 27.48 and 5.20
Step-by-step explanation:
Using the equation ...
y = ax² + bx + c
You can substitute the first three points to get linear equations in a, b, and c.
10 = a(-3)² +b(-3) +c = 9a -3b +c
4 = a(0)² + b(0) +c = c
-1 = a(3)² + b(3) +c = 9a +3b +c
The second equation tells us c=4. Subtracting the first equation from the last, we get ...
(9a +3b +c) -(9a -3b +c) = (-1) -(10)
6b = -11
b = -11/6
Then we can find "a" from the first equation:
10 = 9a -3(-11/6) +4
1/2 = 9a . . . . subtract 19/2
1/18 = a . . . . . divide by 9
The model is ...
y = (1/18)x² -(11/6)x +4 . . . . . . . . [call this "model A"]
y = (x² -33x +72)/18
Solving this for y = -4, we have ...
-4 = (x² -33x +72)/18
x² -33x +144 = 0 . . . . . . multiply by 18, add 72
(x -16.5)² -128.25 = 0 . . . . put in vertex form
x = 16.5 ±√128.25 ≈ {5.17525, 27.8248}
___
The closest values to these among the choices offered are those of choice C. It appears that the coefficients of model A were rounded to 3 decimal places (or so) before the predicted x-values were computed.
A has coordinates (1, 2).
Find the coordinates of B.
Answers
Answer:
And we can solve for and we got:
And we can solve for and we got:
So then the coordinates for B are (3,8)
Step-by-step explanation:
For this case we know that the midpoint for the segment AB is (2,5)
And we know that the coordinates of A are (1,2)
We know that for a given segment the formulas in order to find the midpoint are given by:
And we can solve for and we got:
And we can solve for and we got:
So then the coordinates for B are (3,8)
Final answer:
The coordinates of point B are (4, 8).
Explanation:
To find the coordinates of point B, we can use the midpoint formula. The midpoint formula states that the coordinates of the midpoint M(xm, ym) of a line segment with endpoints A(x1, y1) and B(x2, y2) are given by:
xm = (x1 + x2) / 2
ym = (y1 + y2) / 2
In this case, we are given that the midpoint M is (2, 5) and A is (1, 2). We can substitute these values into the formula:
2 = (1 + x2) / 2
5 = (2 + y2) / 2
Now, we can solve for x2 and y2:
x2 = 4
y2 = 8
Therefore, the coordinates of point B are (4, 8).
Learn more about Coordinates
#SPJ3
Answers
Answer:
yes and there a r godd film?
Step-by-step explanation: