Answer:
a
Step-by-step explanation:
Please help meeeeeeee
Answer:
the answer is b..all the answer optioni get 0.01
To assess the effectiveness of a kindergarten-readiness program, 15 children from a random sample were each given a diagnostic assessment before beginning the program and a follow-up assessment after completing the program. For each child, the difference in the score points between the two assessments was calculated and used to create the 95 percent confidence interval (20.1,23.9)(20.1,23.9).
Assuming all conditions for inference are met, which of the following is a correct interpretation of the interval?
A) For all children in the program, 95 percent of the children will have a mean difference in scores of between 20.1 points and 23.9 points.
B) There is a 0.95 probability that the mean difference in scores for all children in the sample is between 20.1 points and 23.9 points.
C) There is a 0.95 probability that the mean difference in scores for the children in the program is between 20.1 points and 23.9 points.
D) We are 95 percent confident that the mean difference in scores for all children in the program is between 20.1 points and 23.9 points.
E) We are 95 percent confident that the mean difference in scores for the children in the sample is between 20.1 points and 23.9 points.
Answer:
D) We are 95 percent confident that the mean difference in scores for all children in the program is between 20.1 points and 23.9 points.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
95 percent confidence interval (20.1,23.9)
We are 95% sure that the population mean(that is, the mean for all children in the program) is in this interval. So the correct answer is given by option D.
4 -3x + 7 what is cofient
Answer: 3
Step-by-step explanation:
A coefficient is the number that comes before a variable, so the three is before the x so 3 is the coefficient.
What are the coordinates of the midpoint between the points (-1,4) and (2,-5)
Answer:
(1/2, -1/2)
Step-by-step explanation:
To find a midpoint add the two x's and divide by 2 so -1+2 / 2 = 1/2
add the two y's and divide by 2 so 4-5 / 2 = -1/2
Put the two numbers together as a coordinate (1/2, -1/2)
Why were most peppered moths dark in the 1959 era but light in the 2000s?
whats 60 + 9........
Answer:
Its 69 just use your fingers
Step-by-step explanation:
A pipe is to be cut up such that the second piece is 3 inches shorter than the first and the third piece is
four inches more than the first. How long is each piece if the pipe is 84 inches long?
Answer:
[tex]F = 27\frac{2}{3}[/tex]
[tex]S = 24\frac{2}{3}[/tex]
[tex]T = 31\frac{2}{3}[/tex]
Step-by-step explanation:
Represent the first piece with F, the second with S and the third with T.
So:
[tex]S = F - 3[/tex]
[tex]T =4+ F[/tex]
[tex]S + T + F = 84[/tex]
Required
Find the length of each piece
Substitute [tex]S = F - 3[/tex] and [tex]T =4+ F[/tex] in [tex]S + T + F = 84[/tex]
[tex]F - 3 + 4 + F + F = 84[/tex]
Collect like terms
[tex]3F = 84 + 3 - 4[/tex]
[tex]3F = 83[/tex]
Divide through by 3
[tex]F = \frac{83}{3}[/tex]
[tex]F = 27\frac{2}{3}[/tex]
Substitute [tex]F = 27\frac{2}{3}[/tex] in [tex]S = F - 3[/tex] and [tex]T =4+ F[/tex]
[tex]S = F - 3[/tex]
[tex]S = 27\frac{2}{3} - 3[/tex]
[tex]S = 24\frac{2}{3}[/tex]
[tex]T =4+ F[/tex]
[tex]T = 4 + 27\frac{2}{3}[/tex]
[tex]T = 31\frac{2}{3}[/tex]
Here are the costs of the sametypes is shops shop a pack 4 batteries £1.60
Answer:
Cost in shop A is lesser.
Step-by-step explanation:
Given:
Shop A 4 batteries cost = £1.60
Shop B 6 batteries cost = £2.70
Find:
Lower price
Computation:
Cost in shop A = £1.60 / 4
Cost in shop A = £0.4
Cost in shop B = £2.70 / 6
Cost in shop B = £0.45
Cost in shop A is lesser.
If 3 out of every 5 dentist recommend sugarless gum to their patients who chew gum, how many would recommend sugarless gum if 100 dentist were polled
A)80
B)85
C)75
D)60
Answer: d 60 I think
Step-by-step explanation:
I need help with this
Answer:
x=45
Step-by-step explanation:
This is a triangle so it interior degrees will add up to 180.
W
Since Line AC is tangent to Circle O at point c, Point C measures 90 degrees.
We can find OAC by using the triangle interior theorem,
[tex]45 + 90 + x = 180[/tex]
[tex]135 + x = 180[/tex]
[tex]x = 45[/tex]
Jorge was studying average life expectancy in Europe and how it varies across different countries. He wanted to discover what variables were good predictors of life expectancy and identified 3 that he believed could possibly be good predictors:
employment rate,
access to healthcare, and
number of car accidents per year.
He conducted a multiple linear regression analysis using these variables.
When looking over the results of this analysis, he saw
that the scatterplot did not show a linear pattern between each of the explanatory variables and the response variable.
that there was not a funnel shape to the residual vs. predicted plot. that the histogram of the normal quantile plot was fairly normal.
Based on all of these findings,
he can say that the linearity condition _________
the equal variance condition ________
the normality condition _____________
the 10% condition ____________
and the success failure condition __________
Options for each:
A) is not met
B) does not need to be checked for multiple linear regression
C) is met
Answer:
Is not met ( A )Is not met ( A ) Does not need to be checked for multiple linear regression ( B )Does not need to be checked for multiple linear regression ( B )Step-by-step explanation:
Linearity condition is : NOT MET
The equal variance condition is : NOT MET
The 10% condition : Does not need to be checked for multiple linear regression
The success failure condition : Does not need to be checked for multiple linear regression
please help me i really need help please
Answer:i know the x for 1 not for the other 2
Step-by-step explanation:1 is 4
Answer:
17) x= 36
18)
Step-by-step explanation:
17) 2x + 2x + x =180°(angles of a triangle)
5x = 180°
divide both sides by 5
X = 36
18) 7x +3x + 90° = 180°(angles of a triangle)
10x = 90
X = 9
19) 2x + x + x = 180° (angles of a triangle)
4x = 180°
X = 45
hope it helps
1. What value of x make the following true? 2x + 2x + 2x + 2x = 96
Which set of values make the inequality true x-8.7>15.8
Answer:
x>24.5
Step-by-step explanation:
cant do step by step because look
what is the difference in length between the longest meteor and the shortest meteor
Answer:
Please show the full problem
Step-by-step explanation:
Answer:
If this is the same question the answer is 3 1/3
Step-by-step explanation:
This net folds into a cube. Which two letters appear on opposite faces?
Answer:
Three answers B and D, A and C, F and E
I'm not very sure how to explain this.
A triangle has side lengths of 23 cm, 6 cm, and 28 cm. Classify it as right,acute, or obtuse
Obtuse
Right
Acute
How many 1/5 are in 20? Enter your answer in the bo
Answer:
4
Step-by-step explanation:
20 devided by 1/5 is 4
please help me answer this question
Which fraction in simplest from is equivalent to 4/6?
A. 1/3
B. 1/4
C. 2/3
D. 1/3
Answer:
C. 2/3
Step-by-step explanation:
To simplify 4/6 we need to divide 4 by 2 and 6 by 2.
Please help me with these two questions!
Answer:
Formula for both is: A= (h•b)/2
Plug in values for First one are: 16 and 14
Area of first one: 112in^2
Plug in values for Second one: 2 and 3.5
area of second one: 3.5m^2
Step-by-step explanation:
plug in the values-. A= 16•14= 224 224÷2= 112
plug in the values #2- A= 2•3.5= 7 7÷2= 3.5
hope this helps u <3
Find the product: (0.45)•(0.008)
0.45x0.008=0.0036
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hope it helps
Anyone know how to answer? need help asap
Umm I need help what is the answer. I need it fast!
Answer:
x + 3y - 9
Step-by-step explanation:
Answer:
i also need help
Step-by-step explanation:
do it yourself
A physical education teacher wanted to know the effects of various activity levels on body composition. She surveyed her physical education classes and categorized 30 students into five activity levels based on the amount of daily exercise in which the students participated: inactive, semiactive, normal, active, and very active. She measured percent body fat values using skinfold calipers on all subjects with the following results.
Inactive Semiactive Normal Active Very Active
30.2 29.4 22.9 17.6 10.9
29.6 17.6 25.4 13.4 13.7
35.2 26.4 19.6 20.3 12.8
19.1 25.3 18.7 19.6 14.7
26.3 22.5 21.8 15.1 9.3
22.4 28.6 24.9 10.7 12.7
Required:
a. What is the independent variable in this study? What is the dependent variable?
b. What are the means and standard deviations for each group?
c. Does a significant difference exist among any of the groups?
Answer:
a. The independent variable is the activity level
The dependent variable is the body composition (the percentage of body fat in the values)
b. The mean and standard deviation are;
(Mean, Standard deviation)
Inactive(27.13, 5.8), Semiactive(24.97, 4.367), Normal(22.217, 2.73), Active(16.12, 3.73), Very Active (12.35, 1.95)
c. Yes
Between Semiactive and Active, Semiactive and Very Active, Normal and Very Active, Normal and Active, Active and Inactive, and Inactive and Very Active
Step-by-step explanation:
a. The independent variable is the activity level
The dependent variable is the body composition (the percentage of body fat in the values)
b. The given data are presented as follows;
Inactive [tex]{}[/tex] Semiactive Normal Active Very Active
30.2 [tex]{}[/tex] 29.4 22.9 17.6 10.9
29.6 [tex]{}[/tex] 17.6 25.4 13.4 13.7
35.2 [tex]{}[/tex] 26.4 19.6 20.3 12.8
19.1 [tex]{}[/tex] 25.3 18.7 19.6 14.7
26.3 [tex]{}[/tex] 22.5 21.8 15.1 9.3
22.4 [tex]{}[/tex] 28.6 24.9 10.7 12.7
Bymaking use of Microsoft Excel, we have;
Inactive [tex]{}[/tex] Semiactive Normal Active Very Active
Mean 27.13 [tex]{}[/tex] 24.97 22.217 16.12 12.35
Standard Deviation 5.8 [tex]{}[/tex] [tex]{}[/tex] 4.367 2.73 3.73 1.95
c. Yes
[tex]t=\dfrac{(\bar{x}_{1}-\bar{x}_{2}) }{\sqrt{\dfrac{s_{1}^{2} }{n_{1}}-\dfrac{s _{2}^{2}}{n_{2}}}}[/tex]
The degrees of freedom = n - 1 = 6 - 1 = 5
The critical t = 2.5706
Therefore, we have;
The test statistic for Inactive and semi active ≈ 0.72875
The test statistic for Semiactive Normal ≈ 1.309
The test statistic for Inactive and Normal ≈ 1.8773
The test statistic for Semiactive and Active ≈ 3.775 (Significant)
The test statistic for Semiactive and Very Active ≈ 6.464 (Significant)
The test statistic for Normal and Very Active ≈ 7.204 (Significant)
The test statistic for Normal and Active ≈ 3.231 (Significant)
The test statistic for Active and Inactive ≈ 3.91 (Significant)
The test statistic for Active and Very Active ≈ 2.194
The test statistic for Inactive and Very Active ≈ 5.92 (Significant)
Where the test statistic is larger than the critical 't' the statistic is significant
In January 2007 the population of Canada was 32 million.
7 million of these Canadian people spoke French as their first language.
(a) Express 7 million as a percentage of 32 million.
Give your answer correct to 1 decimal place.
Answer:
21.9%
Step-by-step explanation:
7000000/32000000=0.21875
move the decimal over two places to get percent and round the 8 up because of the 7. 21.9%
Find the value of x on a kite
Answer:
When we combine like terms we get 158 plus 2x equals 360 subtract 158 from both sides. And we get 2x...
Step-by-step explanation:
What is the surface are of the box in square meters that Elizabeth decorates
Answer:
Step-by-step explanation:
What is the equation ( y = mx + b) of the line that passes through (2,5) and (6, 13)
Answer:
y=2x+1
Step-by-step explanation:
y=mx+b
m=(13-5)/(6-2)
m=8/4
m=2
b=y-mx
b=5-2*2
b=5-4
b=1
y=2x+1
Answer:
y=2x+1
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(13-5)/(6-2)
m=8/4
m=2
y-y1=m(x-x1)
y-5=2(x-2)
y-5=2x-4
y=2x-4+5
y=2x+1
4x²y+2xy² simplefid in algebra
Answer:
Difficulties regarding the emotions of your body.
Step-by-step explanation:
Difficulties regarding the emotions of your body.