Answer:
246.
Step-by-step explanation:
a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78
b) The minimum sample size to achieve this is 246.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population(square root of the variance) and n is the size of the sample. So in this question,
The lower end of the interval is the sample mean subtracted by M. So it is 99 - 0.78 = 98.22
The upper end of the interval is the sample mean added to M. So it is 99 + 0.78 = 99.78.
a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78
(b) (5 points) If we want the sampling error to be no greater than 0.5, what is the minimum sample size to achieve this based on the same confidence level with part (a)
We need a sample size of n
n is found when
Then
Rounding up
The minimum sample size to achieve this is 246.
(a) Write an equation to find x. Make sure you use an "=" sign in your answer
Answer:
2x- 13 = 4x + 2
Solve for x !!!!!!!!
Answer:
x = 9
Step-by-step explanation:
to find the value of x
11x - 11 = 110 (alternate exterior angles are equal)
Substitute
11x = 110 -11
11x = 99
x = 99 ÷ 11
x = 9
Answer:
x=11
Step-by-step explanation:
Because 110= 11x-11, you can use this equation to solve.
First, add 11 to both sides:
121=11x
Then divide by 11:
11=x ------> x=11
Hope this helps!
Rewrite as a whole number.
80/8
Answer:
10
Step-by-step explanation:
Find the value of each expression. Then write an expression that has the same value, using addition 7 – (-3) 7 – 3 59 – (-1) -17 – (-6) of related numbers.
Answer:
7-(-3)=10
7-3=4
59-(-1)=60
-17-(-6)=(-11)
Step-by-step explanation:
In the photo !
A chess club 20 with members is electing a new president. Lashonda received 8 votes. What percentage of the club members voted for Lashonda?
Answer:
Lashonda is not popular. She only received 40% of the votes.
Step-by-step explanation:
8/20 can be simplified to 2/5. If 1/5 is equal to 20%. Then 2 times 20% is 40%.
Please help me with this!!
Answer:
15.6
Step-by-step explanation:
1 times 12 is 12 3/10 of 12 is 3.6 12+3.6=15.6
Answer:
$15.60
Step-by-step explanation:
multiply 1.3 (which is the same as 1 3/10) and 12
PLS ANSWER THE FOLLOWING QUESTION
AND I'LL MARK U AS BRAINLIST
STEP BY STEP EXPLANATION NEEDED
Answer:
140+x+x = 180°(co-interior angle)
140+2x=180°
2x=180°-140°
2x = 40°
x = 40°/2
x = 20°
check:
140+20+20 = 180
180=180
More coins for youuu + follow for brainliest :)
Answer:
10 + 78.567 = 88.567
Step-by-step explanation: thank you
help pls
what is the slope intercept form of (4,0) and (0,5)
Answer: y = -5/4x+5
Hope this helps!!!
number 3.) solve for x
Answer: D) 9
x = 9........
The Hulk just flew into the Boston airport to visit some family, but due to car problems, they are
unable to pick him up. He only has $20 on him. He needs to call a cab that costs $1.75 initially and
$.65 per mile. How far will he be able to go? If his family lives 25 miles away, will the cab be able to
get him to his family?
Answer:
Yes, he will be able to afford 25 miles
Step-by-step explanation:
20.00 - 1.75 = 18.25
He will have $18.25 after the initial payment.
18.25 / 0.65 = 28~
He will be able to go 28 miles with the 18 dollars he has left.
19/24 nearest hundred
Answer:
0.79
Step-by-step explanation:
Answer:
if speaking in decimal terms, your answer would be 0.79/ 0.7916/ 0.79167
Step-by-step explanation:
Jamie saw 12 ducks on the lake. When Jamie said that 1/2 of the ducks swam away, how many ducks was that?
a) 8
b) 4
c)6
How do you solve these two problems please explain step by step
Answer:
1) [tex]x=15, y=41[/tex]
2) [tex]x=6, y=24[/tex]
Step-by-step explanation:
1)
The two triangles are similar by AA similarity.
That means [tex]5x-5=4x+10[/tex].
We can add [tex]5[/tex] to both sides to get [tex]5x=4x+15[/tex].
We can then subtract [tex]4x[/tex] from both sides to get [tex]x=15[/tex].
We know that the [tex](5x-5)+(6y-4)=180[/tex] because they both lie on a straight line.
We can plug in for [tex]x[/tex] to get [tex](5(15)-5)+(6y-4)=75-5+6y-4=6y-66=180[/tex].
We can divide both sides of the equation by [tex]6[/tex] to get [tex]y-11=30[/tex].
We then add [tex]11[/tex] to both sides to get [tex]y=41[/tex].
So, [tex]\boxed{x=15, y=41}[/tex] and we're done!
2)
Because the two bases of a trapezoid are parallel, meaning adjacent top and bottom angles sum to [tex]180^{\circ}[/tex], we have that [tex]90+3y+18=180[/tex].
We can subtract a [tex]90[/tex] and an [tex]18[/tex] from both sides to get [tex]3y=72[/tex].
We then divide both sides of the equation by [tex]3[/tex] to get [tex]y=24[/tex].
We do the same thing for [tex]x[/tex]. On the other side of the trapezoid, we have that [tex]15x+30+10x=180[/tex].
We combine like terms on the left side to get [tex]25x+30=180[/tex].
We subtract a [tex]30[/tex] from both sides to get [tex]25x=150[/tex].
We divide both sides of the equation to get [tex]x=6[/tex].
So, [tex]\boxed{x=6, y=24}[/tex] and we're done!
Rachel earned $54.79 last week. Morgan earned $50.23. About how much more did Rachel earn?
Answer:
$4.56
Step-by-step explanation:
he table shows ordered pairs of the function y= 8-2x What is the value of y when x=8 ?
A 2-column table with 6 rows. The first column is labeled x with entries negative 3, negative 1, 1, 4, 8, 10. The second column is labeled y with entries 14, 10, 6, 0, question mark, negative 12.
–20
–8
8
Step-by-step explanation:
Reorder
8
and
−
2
x
.
y
=
−
2
x
+
8
sorry if wrong
find the slope of the line
Answer:
A. 3/4
Step-by-step explanation:
Find the 2 points, then count how many boxes it goes up and over to the second point.
0.43 as a fraction ?
Answer:
43/100
Step-by-step explanation:
Which choice is equivalent to the expression shown below?
-3(3y-2x) + 2(5x-4y)
Answer:
[tex] - 3(3y - 2x) + 2(5x - 4y) \\ - 9y + 6x + 10x - 8y \\ 16x - 17y[/tex]
I hope I helped you^_^
please help im begging you, brainliest to correct answer!!!
(zoomed in equation on slide 2)
guy pls help me!!!!!
What exactly is this? 2+6x = 1-x
Draw a picture and write an equation to help you solve the following problems
Answer with Step-by-step explanation:
7x+x=90 [Being complementary angles]
8x=90
x=90/8
x=11.25
x-38+x=180 [Being supplementary angles]
2x=218
x=109
What is the answer to 6.7 x 10^5=
Answer:
670000
Step-by-step explanation:
6.7X10000
[tex]QUESTION:[/tex]
What is 6.7 x 10^5?
[tex]ANSWER:[/tex]
670,000
[tex]COMMENT /VERIFICATION:[/tex]
This is proper scientific notation because the coefficient is between 1 and 10.
Hope this helps! :)
[tex]ANSWERED:\\GraceRosalia[/tex]
Hi, please what's -3 1/2 - 1 5/6
Answer:
-8/3
Step-by-step explanation:
Answer:
-31 / 2 - 15 /7
-31 /2
= 15.5
-15/7
-2 .14
so the answer was.
-8/3
guys…..am i hot?????
Answer:
just btw there is no pic lol
Step-by-step explanation:
A collection of 40 dimes and nickels
is worth $2.90. How many nickels are
there? (Hint: In your equation, use
290¢ instead of $2.90.)
9514 1404 393
Answer:
22 nickels18 dimesStep-by-step explanation:
Let d represent the number of dimes (the higher-value coin). Then the number of nickels is 40-d, and the total value in cents is ...
5(40 -d) +10(d) = 290
200 +5d = 290
5d = 90
d = 18
40 -d = 22
There are 22 nickels (and 18 dimes).
_____
Additional comment
If you write the equation in terms of the number of nickels (n), you end up with the equation -5n = -110. The formulation used above avoids negative numbers, which can be confusing for some people.
Approximately how much greater, in grams is 191520 than 146640
-7x+3y=2 (find the ordered pair)
A. (1,3)
B: (-2,-4)
C. Both
D. Neither
How do i simplify this question?