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
adelina 88 [10]
3 years ago
6

A random sample of n = 64 observations has a mean x = 29.9 and a standard deviation s = 3.7.

Mathematics
1 answer:
Elis [28]3 years ago
4 0

Answer:

(29.128,30.672)

Step-by-step explanation:

Given that a random sample of n = 64 observations has a mean x = 29.9 and a standard deviation s = 3.7.

a) the point estimate of the population mean μ.

= Sample mean = 29.9

For 90% we use t critical value since population standard deviation is not known.

T critical for 90% is 1.669

Margin of error = ±1.669*\sqrt{\frac{3.7}{\sqrt{64} } } \\=0.7719

b) Confidence interval 90%

= Mean±Marginof error

= (29.128,30.672)

You might be interested in
The Shirts For All shop keeps track of the total number of white and tie-dye t-shirts it sells. In one week, 500 shirts were sol
bagirrra123 [75]

Step-by-step explanation:

Cost of white shirt=$15

Cost of tie-dye shirt = $20

Total number of shirts= 500

Total number of white shirts= 200

Cost of white shirts = 200×15=$ 3000

Total number of tie-dye shirts = 300

Cost of tie-dye shirts = 300×20= $6000

Verification:

3000+6000=$9000 proved!

7 0
3 years ago
Read 2 more answers
Eighty-three and seventy-four hundredths minus sixty-one and ninety-seven hundredths equals _____.
beks73 [17]

21.77 you can also type that in in the google search bar and your answer will pop up

6 0
3 years ago
Read 2 more answers
12. A scientist is observing a family of mice. There are four nice which are reproducing and doubling in number every month. Whi
Margaret [11]

Answer:

?

x = the number of months pass right

3 0
2 years ago
5 kilograms of coffee are going to be shared equally among 4 people.
kherson [118]

Step-by-step explanation:

I'm not sure if this will help but to find out how much coffee 4 people would need you would have to divide 4 into 5 which is 1 1/5

EQUATION-- 4/5= X

I chose that because / means divide 5 into 4 would give you x we don't know what x is until we actually do the problem

Even if im not correct I hope it helped a bit

5 0
2 years ago
The radius of circle A is 4 times greater than the radius of circle B. Which of the following statements is true?
Black_prince [1.1K]

Answer:

Correct answer: C.  Ca = 4 Cb

Step-by-step explanation:

Given: Ra = 4 Rb

Ca : Cb = ?

Using the following formula to calculate the circumference of a circle:

C = 2 R π

Cb = 2 Rb π

Ca = 2 Ra π = 2 ·( 4 · Rb) · π = 4 · (2 Rb π) = 4 · Cb

Ca = 4 · Cb

God is with you!!!

3 0
3 years ago
Other questions:
  • Solve the equation .<br><br> The solution of the equation is <br> .
    13·2 answers
  • Guys, please help me with this question
    13·1 answer
  • Round 84. 359 to the nearest tenth. ​
    9·1 answer
  • Please HELP ME ASAP quick
    15·1 answer
  • Graph g(x) = 3x2 - 2. Compare the graph to f(x) = x2
    8·1 answer
  • Write the linear equation for each graph.​
    12·1 answer
  • Helpp me pleaseee I need it?
    6·1 answer
  • For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.
    15·1 answer
  • Today only, a table is being sold for 134.40 . This is 32% of its regular price. What was the price yesterday?
    13·2 answers
  • two integers, a and b, have different signs. the absolute value of inter a is divisible by the absolute value of integer b. Find
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!