If this random sample is representative of elementary students in the United States, which of the following inferences can be made from the data? Select all that apply.
A.The majority of the households in the United States, with at least one child, contain less than three children.
B.Very few households in the United States contain four or more children.
C.All households in the United States contain at least one child.
D.None of the households in the United States contain five children.
Answers
Answer:
A and B
Step-by-step explanation:
Total sample 30
less than 3 children : 24 So A
4 or more children : 2 So B
C : wrong some households have no child ( not in our sample)
D : wrong There are some households have 5 child ( not in our sample)
Related Questions
Find the rate of change for the interval [5,15]
Answers
The rate of change between 5,15 is 10
It’s not 15 read the text
Answers
Answer:
B
Step-by-step explanation:
I think it is B because 6 times 5 = 30. So 30 times 1/2 = 60 hope this is correct and it helped and if it is not correct try C and can i get a brainliest
Simplify this expression-6+3m+2-m+8
Answers
Answer:
2m+4
Step-by-step explanation:
[tex] \rm \mapsto - 6 + 3m + 2 - m + 8 \\ \rm \mapsto3m - m - 6 + 2 + 8 \\ \rm \mapsto2m + 4 \\ \rm \mapsto2(m + 4)[/tex]
Answer:
4+2m
Step-by-step explanation:
-6+3m+2-m+8
(-6+2+8)+(3m-m)
4+2m
2.please I need help
Answers
9514 1404 393
Answer:
48°60°72°Step-by-step explanation:
The sum of ratio units is 4+5+6 = 15, so each unit stands for 180°/15 = 12°. Multiplying the ratio units by 12° gives the angle values:
4×12° : 5×12° : 6×12° = 48° : 60° : 72°
Angles 1 to 3 are 48°, 60°, 72°, respectively.
What is the area of this triangle, in square units? Explain or show your reasoning.
Answers
Answer:
Half of the base multiple by the height
Question 6 of 10
Suppose that there were a strong correlation between the variables dand f.
Which of these is a true statement?
A. d must cause f.
O B. dmay cause f.
O C. dmust not cause f.
D. f must cause d.
Answers
These are lines in a plane that are always the same distance apart and never intersect. What are they? *
Answers
Answer:
Parallel lines
Step-by-step explanation:
Parallel lines never intersect and are always same distance apart.
Hope this helps, thank you :) !!
Answer: Parallel Lines
Step-by-step explanation:
David's net worth is $45,765.78 and his assets have a value of $62,784.14. If his assets increase by $2,784.89 and his liabilities decrease by $3,742.36, what is his net worth?
Answers
Answer:
so 4,854.47
Step-by-step explanation:
will give brainlyist helpppp
The average depth of the Arctic Ocean is approximately 1050 meters, and the average depth of the Indian Ocean is approximately 3900 meters. To the nearest tenth, how many times as great is the average depth of the Indian Ocean compared to the average depth of the Arctic Ocean?
A. 3.7
B. 3.1
C. 2.8
D. 2.2
Answers
Answer:
A. 3.7
Step-by-step explanation:
3900/1050 = 3.7
Answer:
3.7
Step-by-step explanation:
[tex]3900 \1050 = 3.7 \\ [/tex]
3.Write the equation of the line best fit
Answers
Answer: y = -5/8x + 6
Step-by-step explanation: The line of best fit refers to a line through a scatter plot of data points that best expresses the relationship between those points. The line of best fit is already given in this specific question, and we just have to figure out the equation of that line. The equation can be determined using the equation y=mx+b, where "y" represents the output, "m" represents the slope (vertical change compared to the horizontal change), "x" represents the input, and "b" represents the y-intercept (where the line crosses the y-axis). Since the slope (rise over run) is -5/8 and the y-intercept is (0,6), the equation of the line of best fit is y=-5/8x+6.
The area of a triangle is 150 in2. If the height is 20 inches, find the
length of the base.
Answers
Answer: The base of the triangle is 15 inches
Formula for area of a triangle: A = bh/2
Subsitute values into the formula:
150 = b(20)/2
Now solve for b
150 = b20/2
x 2 x2
--------------------
300 = b20
300/20 = b20/20
15 = b
The base of the triangle is 15 inches
Calculate the range for both sets of data:
Set A: 8.7, 1.8, 1.2, 1.4, 6.8, 0.9, 9.8
Set B: 2.7, 3.3, 8, 7.1, 4.6, 6.3
Answers
Range of Set B=5.3
A researcher would like to estimate p, the proportion of U.S. adults who support recognizing civil unions between gay or lesbian couples.
If the researcher would like to be 95% sure that the obtained sample proportion would be within 1.5% of p (the proportion in the entire population of U.S. adults), what sample size should be used?
(a) 17,778
(b) 4,445
(c) 1,112
(d) 67
(e) 45
Due to a limited budget, the researcher obtained opinions from a random sample of only 2,222 U.S. adults. With this sample size, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than (answers are rounded):
(a) .04%
(b) .75%
(c) 2.1%
(d) 3%
(e) There is no way to figure this out without knowing the actual sample proportion that was obtained.
Answers
Answer:
Question 1:
(b) 4,445
Question 2:
(c) 2.1%
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
The margin of error is of:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
95% confidence level
So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].
Question 1:
We have no previous estimate for the population proportion, so we use [tex]\pi = 0.5[/tex].
The sample size is n for which M = 0.015. So
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]0.015 = 1.96\sqrt{\frac{0.5*0.5}{n}}[/tex]
[tex]0.015\sqrt{n} = 1.96*0.5[/tex]
[tex]\sqrt{n} = \frac{1.96*0.5}{0.015}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.96*0.5}{0.015})^2[/tex]
[tex]n = 4268[/tex]
Samples above this value should be used, and the smaller sample above this value is of 4445, so the answer is given by option b.
Question 2:
Now we find M for which [tex]n = 2222[/tex].
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]M = 1.96\sqrt{\frac{0.5*0.5}{2222}}[/tex]
[tex]M = 0.021[/tex]
So 2.1%, and the correct answer is given by option c.
what is the range of f?
Answers
Answer:
Range is [tex]-5 \le y \le 5[/tex]
Range in interval notation is [-5, 5]
==========================================================
Explanation:
Refer to the diagram below. As marked in red, the smallest y value is y = -5. The largest y value is y = 5. The range is the set of y values between these endpoints, including both endpoints.
We can say the range is [tex]-5 \le y \le 5[/tex]
In interval notation, we write that as [-5, 5]. The use of square brackets tells the reader that the endpoints are included as part of the range.
Enter an equation of the form y= mx for the line that passes through the
origin and has slope 13.
Answers
Answer:
y = 13x
Step-by-step explanation:
gradient = 13
x = 0
y = 0
[tex]\frac{Δy}{Δx}[/tex]
so [tex]\frac{y - 0}{x - 0}[/tex] = 13
cross multiply and you get
y = 13x
Find the value of x round to the nearest tenth
Answers
Answer:
8.2
Step-by-step explanation:
sin^-1 (8.2/21) is 22.984 which is pretty close to 23
A clown weighs 60 lb more than a trapeze artist. The trapeze artist weighs two-thirds as much as the clown. How much does each weigh?
Answers
Answer:
Step-by-step explanation:
well if the clown weighs 60 lbs more than the trapeze artist...
and the trapeze artist is 2/3 the weight of the clown...
then the trapeze artist must weigh 120 lbs..
and the clown must weigh 180 lbs..
i hope this was correct lol
Find the midpoint of the segment below and enter its coordinates as an
ordered pair. If necessary, express coordinates as fractions, using the slash
mark (7) for the fraction bar.
10
(3,7)
Answer here
-10
10
(2, -1)
-10
Answers
Answer:
([tex]\frac{5}{2}[/tex], 3)
Step-by-step explanation:
I got 5/2 as my x variable and 3 for my y variable to being the midpoint. In which I added both my x variables provided ( 3 and 2 ) and then I divided them by two to get half of that (since you are looking for in between those two digits technically so you are wanting to find the midpoint or the middle of that line segment). I also did the same with the two y variables as well which were 7 and -1, then I divided both by two to get the variable 3.
Answer:
5/2, 3
Step-by-step explanation:
that should be your answer (hopefully)
Need help!!!!! with this test pls IM SORRY FOR ASKING SO MANY TIMES BUT PLS HELP
Answers
Answer:
I hope its 15/10
Step-by-step explanation:
please let me know if its wrong
The function g is defined as g(x)=5x² – 3.
Find g(x+1).
Answers
Answer:
5x² + 10x + 2
Step-by-step explanation:
g(x + 1) = 5(x + 1)² - 3 = 5( x² + 2x + 1 ) - 3 = 5x² + 10x + 2
In simplest radical form, what are the solutions to the quadratic equation 6 = x2 - 10/?
Quadratic formula: * = -bt/b? 40c
20
O x=5+31
O x = 51/19
O x = 5+219
O x = 5+2/31
Answers
Answer:
[tex]x = 5 \± \sqrt{31}[/tex]
Step-by-step explanation:
Given
[tex]6 = x^2 - 10x[/tex]
Required
The solution in radical form
[tex]6 = x^2 - 10x[/tex]
Rewrite as:
[tex]x^2 - 10x - 6 = 0[/tex]
Using the quadratic formula, we have:
[tex]x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}[/tex]
Where
a = 1
b = -10
c = -6
So, we have:
[tex]x = \frac{-(-10) \± \sqrt{(-10)^2 - 4*1*(-6)}}{2*1}[/tex]
[tex]x = \frac{10 \± \sqrt{100 +24}}{2*1}[/tex]
[tex]x = \frac{10 \± \sqrt{124}}{2}[/tex]
Split the roots
[tex]x = \frac{10 \± \sqrt{4 * 31}}{2}[/tex]
Express [tex]\sqrt 4[/tex] as 2
[tex]x = \frac{10 \± 2\sqrt{31}}{2}[/tex]
Split the fraction
[tex]x = \frac{10}{2} \± \frac{2\sqrt{31}}{2}[/tex]
[tex]x = 5 \± \sqrt{31}[/tex]
4/5 of the senior class went to prom if 324 seniors went to prom how many are there in the senior class
Answers
Answer:
405
Step-by-step explanation:
324 seniors is 4/5 of all seniors. To find how many 5/5 of the seniors is, we find 1/5 and multiply it by 5. Since 4/5 is 4 times 1/5, divide 324 by 4. The answer is 81, which is 1/5 of the seniors. Multiply 81 by 5 to get all 5/5. 81 * 5 is 405
Adriana's cell phone carrier withdraws $65.75 from her bank account each month to pay her cell phone bill. She deposits a paycheck each month in the amount of $832.43. What is the change in her bank account after three months?
Answers
Answer:
38.0
Step-by-step explanation:
first you divide then times
Here is an expression:4 . 3t Evaluate the expression when t is 2.
Answers
If so, 4 x 3 (2)= 24
Convert 85 feet per day into miles per year.
Answers
Answer:
85 feet per day = 5.879846 miles per year.
Answer:
5.88 miles
Step-by-step explanation:
85 x 365 =31,025 feet per year
31025/5280 = 5.88 miles
The following estimated regression equation was developed for a model involving two independent variables.
ŷ =40.7+8.63x1+2.71x^2
After x2 was dropped from the model, the least squares method was used to obtain an estimated regression equation involving only x1 as an independent variable.
ŷ= 42.0+9.01x1
Required:
a. Give an interpretation of the coefficient of x1 in both models.
b. Could multicollinearity explain why the coefficient of x1 differs in the two models? If so, how?
Answers
Answer:
(a): y increases on average by 8.63/unit of x1 in the first equation and increases on average by 9.01/unit of x1 in the second
(b): Yes
Step-by-step explanation:
Given
[tex]\wedge y = 40.7 + 8.63x_1 +2.71x_1[/tex]
[tex]\wedge y = 42.0 + 9.01x_1[/tex]
Solving (a): An interpretation of x1 coefficient
We have the coefficients of x1 to be 8.63 and 9.01
Literally, the coefficient represents the average change of y-variable per unit increase of the dependent variable
Since the coefficients of x1 in both equations are positive, then that represents an increment on the y variable.
So, the interpretation is:
y increases on average by 8.63/unit of x1 in the first equation and increases on average by 9.01/unit of x1 in the second
Solving (b): Multicollinearity
This could be the cause because x1 and x2 are related and as a result, x2 could take a part of the coefficient of x2
look at pic 10 pts will mark brainilest
Answers
Answer:
x/4 = 14
Bottom right one
Step-by-step explanation:
x/4 = 14
Bottom right one
There were 4 total and each payed 13.
Answer:
A 4x=$13
Step-by-step explanation:
no links and respond with an explanation please.
Answers
Answer:
2b+1j=?
Step-by-step explanation:
2b represent 2 granola bars
may i please get help for this please and thank you
Answers
Answer:
There's nothing here
Susanne is going to college and was informed that she will get a grant to pay for
her tuition. Which statement describes a grant?
Answers
Answer:
what are the options????