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
Vladimir79 [104]
2 years ago
13

A physicist examines 4 water samples for mercury concentration. The mean mercury concentration for the sample data is 0.470 cc/c

ubic meter with a standard deviation of 0.0581. Determine the 80% confidence interval for the population mean mercury concentration. Assume the population is approximately normal. Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Mathematics
1 answer:
Hitman42 [59]2 years ago
8 0

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

We want to determine a 80% confidence interval for the mean mercury concentration of water samples

Number of samples. n = 4

Mean or average = 0.470 cc/cubic meter

Standard deviation, s = 0.0581

For a confidence level of 80%, the corresponding z value is 1.28. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

0.470 +/- 1.28 × 0.0581/√4

= 0.470 +/- 1.28 × 0.0566/2

= 0.470 +/- 0.036

The lower end of the confidence interval is 0.470 - 0.036 =0.434

The upper end of the confidence interval is 0.470 + 0.036 =0.506

In conclusion, with a 80% confidence interval, the mean lead mean mercury concentration of the water samples is between 0.434 cc/cubic meter and 0.506 cc/cubic meter

You might be interested in
A movie theatre sells 3 different sizes of popcorn: small, medium, and large. An order of popcorn comes with 4 different topping
Darina [25.2K]

you can only choose 4 unique ways Step-by-step explanation:

6 0
3 years ago
What is y when x is 893?
garik1379 [7]

The computation shows that the value of y when is 893 will be 1339.5

<h3>How to compute the value?</h3>

It should be noted that when x is 2 y is 3.

Therefore, the value of y when x is 893 will be

= 893 × 3/2

= 1339.5

Therefore, the value of y will be 1339.5

Learn more about computations on:

brainly.com/question/4658834

#SPJ1

When x is 2, y is 3. Then what is y when x is 893?

5 0
1 year ago
Thi is a venn diagram or set question
Zanzabum

Answer: The answer is 33% of people spoke Hausa and English language.

Step-by-step explanation:

8 0
2 years ago
Algebra 1 please help!
Leona [35]

Answer:

a. geometric

b. a<em>n</em> =  2(2)^n-1 or a<em>n</em> = 2^n

c. a<em>n+1</em> <em>= </em>a<em>n</em> x 2

Step-by-step explanation:

The sequence, 2, 4, 8, 16, 32,...

a. The sequence is geometric because there is a common ratio in the numbers of the sequence. Each number is made by multiplying the common ratio and the previous number.

b. The explicit formula that can be used to find any term is a<em>n</em> =  2(2)^n-1 or a<em>n</em> = 2^n

Note: the variable n and number 1 is written in italics to show that it should be in subscript

a<em>n</em> = a<em>1 </em>(r)n-1

With the common ratio of n being 2 and first number being 2, we have:

a<em>n</em> =  2(2)^n-1

or

a<em>n</em> = 2^n

c. The recursive formula for the sequence is a<em>n+1</em> <em>= </em>a<em>n</em> x 2

a<em>n+1</em> = a<em>n </em>x r

Plugging in the values, we have

a<em>n+1</em> <em>= </em>a<em>n</em> x 2

Your welcome, and comment if you have any questions! If you could mark this answer as brainliest, I would appreciate it very much!

5 0
2 years ago
Two ships are near a buoy in the open ocean. One ship is 20 km due north of the buoy, and the other ship is 13.5 km due east of
Strike441 [17]
The awnser th this question is 24.1 took the test hope this helps !!
3 0
2 years ago
Read 2 more answers
Other questions:
  • F (x) = x - 5, what marches f (-1)
    6·1 answer
  • The class has 30 boxes of pencils each package each package has 10 pencils the class needs 600 pencils how many more boxes does
    7·2 answers
  • Solve for h. <br> 7/5h - 2= -3/5h +7<br> Please show work!
    13·2 answers
  • How far is the<br>crab from the<br>sea level?​
    5·1 answer
  • Somebody said they are all false. is that true?​
    5·1 answer
  • What is the answer to x/3-2=7
    11·1 answer
  • P = 2m + 2w solve for m
    13·2 answers
  • Find the measure of &lt;JKL =63°​
    13·1 answer
  • Please helppppp i need help
    14·2 answers
  • What is the area of the trapezoid?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!