1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shutvik [7]
2 years ago
12

100 points, I need help fast!

Mathematics
1 answer:
ivolga24 [154]2 years ago
4 0

a. The standard error is equal to the standard deviation divided by the square root of the sample size:

SE = (23 ppm)/√18 ≈ 5.42 ppm

b. The t statistic is given by the difference between the true and sample means, divided by the standard error:

t = (192 ppm - 180 ppm)/SE ≈ 2.21

c. The p-value is approximately 0.0204.

d. Since p < 0.05, the difference is significantly different, so we reject the null hypothesis.

e. A type I error might have occurred, since it's possible that the null hypothesis was true, but we ended up rejecting it.

You might be interested in
Complete the sentence.
vovangra [49]
The answer is A because the bigger/ larger the Apple the longer time it takes to eat it
3 0
2 years ago
Sara had some buns she sold 5/9 of them, if she has 128 buns left. How many bums did she have at first?
mina [271]

Step-by-step explanation:

Maybe she had

128 + 9 = 137 buns

7 0
3 years ago
Read 2 more answers
Hector has a part-time job at a garage. He gets a paycheck of $820 every for
ElenaW [278]

Answer:

<u>A. Hector pays $ 123 in taxes each paycheck.</u>

<u>B.  Hector should expect to receive $615 or 75% of his regular pay.</u>

<u>C. Hector will be paid $ 902 when he receives his next 4- week paycheck.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the questions correctly:

Paycheck Hector gets every four weeks = $ 820

2. Hector has to pay 15% of his income in taxes. How much money does he

pay in taxes each paycheck? Show your thinking with a diagram and

calculations.

Taxes = 15% of 820

Taxes = 0.15 * 820

Taxes = $ 123

Hector's paycheck: ←------------------------------820--------------------------------------→

Taxes:                       ←----123---→

3. Hector took a 1-week vacation, so his next paycheck will only be for 3

weeks of work. What percentage of his regular pay should he expect to

receive? How much is that?

We can answer this question using the Direct Rule of Three, this way:

  Weeks         Paycheck

      4                   820

      3                     x

***********************************

4x = 820 * 3

4x = 2,460

x = 2,460/4

x = 615

615/820 = 0.75 = 75%

4. The garage owner is impressed with Hector's work and is giving him a

10% raise. How much will Hector be paid when he receives his next 4- week paycheck?

Raise = 10% of 820

Raise = 0.1 * 820 = 82

Next 4- week paycheck = 820 + 82 = 902

4 0
3 years ago
Helppppppppppppooppppoopp
Lyrx [107]

Answer:

Let x rep the lenght of the shorter one

Then the longer one is 2x+1

Therefore

(2x+1) + x = 16

We now solve for x

2x + 1 + x = 16

Group and evaluate like terms

3x +1 = 16

3x = 16 -1

× = 15/3

x = 5

So the shorter one is 5 ft

The longer one is 2(5)+1= 11

4 0
3 years ago
Graph and label each figure and it’s image under the given translation. Give the coordinates of the image.
lutik1710 [3]

Answer:

See below ~

Step-by-step explanation:

<u>Question 3 : (x, y - 5)</u>

  • K' = (-3, 2 - 5) = <u>(-3, -3)</u>
  • L' = (1, 4 - 5) = <u>(1, -1)</u>
  • M' = (-1, 0 - 5) = <u>(-1, -5)</u>
  • N' = (-5, -2 - 5) = <u>(-5, -7)</u>

<u></u>

<u>Question 4 : (x + 4, y + 1)</u>

  • D' = (-4 + 4, 3 + 1) = <u>(0, 4)</u>
  • E' = (0 + 4, 2 + 1) = <u>(4, 3)</u>
  • F' = (-2 + 4, -6 + 1) = <u>(2, -5)</u>
  • G' = (-6 + 4, -5 + 1) = <u>(-2, -4)</u>
5 0
2 years ago
Other questions:
  • Graph the line using a point and a slope. Write the equation of each line. A line that passes through the point (0, –3) and para
    15·1 answer
  • Bob has 7 oranges, 10 plums and 4 pears in a bowl. He can choose: an orange and a plum or a plum and a pear or an orange, a plum
    15·1 answer
  • Select all ratios equivalent to 20:12 ...<br> 1)10:6 <br> 2)15:9 <br> 3)3:2
    14·1 answer
  • Determine whether the value is a parameter or statistic 43.87% of voters turned out for the 2004 elections
    10·1 answer
  • Which table represents exponential growth?<br> :))))
    8·1 answer
  • write each of the following word names as mixed if you purchase a hundred items that cost $0.25 each how much would the items co
    6·1 answer
  • H(x) = 3x2 - 2x + 13<br> h(3)<br> [?]
    11·1 answer
  • If you were to rotate ABCD 180degrees about the origin, what would the coordinate of A' be?
    8·2 answers
  • 9 times the quantity of 12 less than a number x is 24. Write in an algebraic expression.
    15·1 answer
  • Find the sum and choose the correct answer. <br> 2n 3 + 4n 2 - 7 and -n 3 + 8n - 2
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!