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
natulia [17]
3 years ago
12

We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of

20 observations having a sample mean of 8 and a sample standard deviation of 2.
What is the margin of error for this confidence interval?
Mathematics
1 answer:
sergiy2304 [10]3 years ago
7 0

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

Sample mean = 8

Sample standard deviation = 2

90% Confidence interval

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729  

Margin of error:

t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

1.729(\frac{2}{\sqrt{20}} ) = 0.773  

You might be interested in
there ar 2.54 centimeters in 1 inch. how many cantimeter are in 1 foot? in 1 yard explain you reasoning
stellarik [79]
2.54 * 12=30.48, so 30.48 in one foot, then multiply that by three for a yard, so for a yard it is 91.44 .
4 0
3 years ago
(English to algebra) twice the difference of w less than five
denpristay [2]

i believe its 2(5-w)

5 0
3 years ago
Read 2 more answers
The graph of a linear function passes through the points (-
myrzilka [38]

Answer:

3/5

Step-by-step explanation:

y2 - y1 / x2 - x1

-1 - (-4) / 2 - (-3)

3/5

3/5 is the slope.

5 0
3 years ago
In slope-intercept form, write the equation of the line that passes through points (-7, 8) and (2, -2).
Ymorist [56]

Answer:

y = -1x + 0.5

Step-by-step explanation:

First, I plotted the points (-7, 8) and (2, -2). Then, I drew a line connecting the two points. At the point (-7, 8), I went down 2 squares and to the right 2. This would give me a slope of -1. Since the line touches the y-axis at 0.5, this is the y-intercept.

I am not sure about the y-intercept of this equation. If I got this wrong, I am sorry and please let me know. Thank you!

3 0
3 years ago
Read 2 more answers
On Friday, Oscar sold 2 pitchers of lemon are from his lemonade stand. On Saturday, he sold 1/2 as much lemonade as on Friday. H
Ann [662]

Answer:

The correct answer is 1 pitcher.

Step-by-step explanation:

Oscar sold 2 pitchers of lemon are from his lemonade stand on Friday.

On Saturday, he sold \frac{1}{2} as much lemonade as on Friday.

The number of pitchers of lemon from the lemonade stand which Oscar sold on Saturday is given by \frac{1}{2} × 2 = 1 pitcher.

Thus Oscar sold 1 pitcher on Saturday which is half of the number of pitchers of lemon he could sell on Friday.

4 0
3 years ago
Other questions:
  • Gloria worked for 6 hours a day for 2 days at the bank and earned $114.24. How much did she earn per hour?
    8·2 answers
  • 5 and 6? i got 3 for both
    7·1 answer
  • Does 5x-1=3(x+11) have one solution
    12·2 answers
  • Your bill at a café is $26.50. You want to leave a 20% tip for your good service. What is the amount of the tip and the total of
    8·2 answers
  • the table shows the break down of math students for one school year. find the probability that a geometry student is in the 11th
    11·1 answer
  • Try This question out I’ll award you brainliest
    13·2 answers
  • A cantaloupe weighs 3/8 pound. A watermelon weighs 4 times as much as the
    6·1 answer
  • Plz help will give what I got (74 points)
    15·1 answer
  • Y = -3x + 10<br> Y = -2x + 6<br><br> The solution to this system is ( ? , ? )
    7·1 answer
  • Arrange these numbers in order from least to greatest.​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!