Which of the following is false regarding number sets
Answers
Answer:
D
Step-by-step explanation:
just took a random guess
Related Questions
I really need help with #1 a and b
The scores on a test are normally distributed. The mean of the test is 750 and the standard deviation is 70. By using the Empirical rule, what scores fall 3 standard deviations from the mean?a.610 and 820b.610 and 960c.680 and 820d.540 and 960
Look at the figure. If ∆LMC ≅ ∆BJK, then _____ ≅ ∆KBA. BJB. CMC. MLD. CL
Square root of -61 to the nearest tenth
Answers
Answer:
675 samples
752 samples
Step-by-step explanation:
Given that :
α = 90%
E = 0.03
Previous estimate (p) = 0.34
Estimated sample proportion (n)
n = p *q * (Zcritical /E)
Zcritical = α/2 = (1 - 0.9) /2 = 0.1 / 2 = 0.05
Z0.05 = 1.645 ( Z probability calculator)
q = 1 - p = 1 - 0.34 = 0.66
n = 0.34 * 0.66 * (1.645/0.03)^2
n = 674.70
n = 675
B.) without prior estimate given ;
p and q should have equal probability
Hence ;
p = 0.5 ; q = 0.5
n = 0.5 * 0.5 * (1.645/0.03)^2
n = 751.67361
n = 752
Final answer:
To determine the sample size for the research, a mathematical calculation is required, considering the level of confidence, the desired margin of error, and, if available, a previous estimate. For a 90% confidence level, two calculations are made based on an assumed proportion—first using the existing estimate of 0.34, and second with no prior estimate (commonly taken as 0.5).
Explanation:
The researcher is trying to determine the sample size required for a study on high-speed Internet access. The sample size can be calculated based on the level of confidence desired and the desired margin of error. In this case, (a) she is using a previous estimate of 0.34 and (b) she does not use any prior estimates.
For the calculation, we can use the formula for sample size in hypothesis testing for a population proportion:
n = (Z^2 * p * (1-p)) / E^2
Where:
- n = required sample size
- Z = z-score corresponding to our desired level of confidence
- p = assumed proportion (in part (a) this is 0.34)
- E = desired margin of error
For a 90% confidence level, the corresponding z-score is approximately 1.645. Now we can plug in the numbers.
(a) If she uses a previous estimate of 0.34, the calculation would be:
n = (1.645^2 * 0.34 * 0.66) / (0.03)^2
You will need to round up to the nearest whole number as you cannot have a part of a participant.
(b) If no previous estimate is used, it is common practice to use 0.5 as this will provide the maximum variance and, therefore, the largest sample size. The calculation would be:
n = (1.645^2 * 0.5 * 0.5) / (0.03)^2
Again, round up to the next whole number. Insert the results for these calculations to your answer.
Learn more about Sample Size Calculation here:
#SPJ3
Answers
Answer:
x = 4 and y = 0
Step-by-step explanation:
Given expression:
-2x + 8y = -8
5x - 8y = 20
Now, to solve this problem by elimination, follow this procedure:
-2x + 8y = -8 --- i
5x - 8y = 20 --- ii
Coefficient of y in both expression have similar values;
Now, add equation i and ii;
(-2x + 5x) + (8y -8y ) = -8 + 20
3x = 12
Divide both sides by 3;
x = = 4
Now, to find y; put x = 4 into equation i,
-2(4) + 8y = -8
-8 + 8y = -8
Add +8 to both sides of the expression;
-8 + 8 + 8y = -8 + 8
8y = 0
y = 0
Answers
Answer:125.6 feet
Step-by-step explanation:
diameter=40 feet
π=3.14
Circumference= π x diameter
Circumference=3.14 x 40
Circumference=125.6
mixture of red and gold beads that she can sell for $2
an ounce. The solution of the system shows the
number of beads needed for Juanita to break even.
x + y = 12
x + 3y = 24
How many ounces of red beads will Juanita buy to
break even?
How many ounces of gold beads will she buy?
Answers
Answer:
6 ounces of red beads
6 ounces of gold beads
Step-by-step explanation:
x + y = 12
x + 3y = 24
We can solve this with substitution or elimination. In this case, I would suggest elimination. Subtract the first equation from the second:
2y = 12
y = 6
Plug back into either equation to find x.
x = 6
Answer:
How many ounces of red beads will Juanita buy to break even?
6
How many ounces of gold beads will she buy?
6
Step-by-step explanation:
Because I got 100 percent on EDG 2020
Answers
Answer:
x = -2
y = -3
Step-by-step explanation:
We can use either substitution or elimination for this problem. I will use elimination to solve this problem:
Step 1: Eliminate x by adding the 2 equations together
9y = -27
y = -3
Step 2: Plug in y into one of the original equations to get x
-9x + 4(-3) = 6
-9x -12 = 6
-9x = 18
x = 2
And we have our final answers!
Answers
Answer:
406
Step-by-step explanation:
We need to find the unit rate or how many miles can they drive in 1 hour. So we do 696/12 which is 58. So we have 58 miles in 1 hour. Now we multiply the number of desired hours, 7 and multiply it by 696. Which is 406