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
antoniya [11.8K]
3 years ago
14

A random sample of 28 items is drawn from a population whose standard deviation is unknown. The sample mean is x=900 and the sam

ple deviation is s = 10. Use appendix D to find the values of student's t. (a) Construct an interval estimate of u with 98% confidence. (Round your answers to 3 decimal places.)
Mathematics
1 answer:
tatiyna3 years ago
7 0

Answer:

<em>795.596≤u≤804.403</em>

Step-by-step explanation:

Confidence interval is expressed using the formula;

CI = xbar ± (z*s/√n)

xbar is the sample mean

z is the z score at 98% confidence

s is the standard deviation

n is the sample size

Given

xbar = 800

z = 2.33

s = 10

n = 28

Substitute into the formula;

CI =800 ± (2.33*10/√28)

CI = 800 ± (2.33*10/5.2915)

Ci = 800± (2.33* 1.8898)

CI = 800 ± 4.4033

CI = (800-4.4033, 800 + 4.4033)

CI = (795.596, 804.403)

<em>Hence an interval estimate of u with 98% confidence is expressed as </em>

<em>795.596≤u≤804.403</em>

You might be interested in
Jane is painting her room. She mixes 3 pints of blue paint with 4 pints of red paint to get her desired color. Which equation ca
Lady bird [3.3K]
Well if she added three blue and four red originally, and is now using 16 red then we would divide 16 by the original four. Which means to get the number of blue we are gonna end up multiplying by four. So three times four is twelve. Which means she would use 12 blue and 16 red to get the same color she got with 3 blue and 4 red earlier. The equation, lets use x for blue and y for red, would be 4(3x + 4y) = desired color
5 0
2 years ago
Read 2 more answers
Plz help! What is the surface area of the figure?​
dexar [7]

Answer:

483 ft²

Step-by-step explanation:

2(7x7)=   98

3(5x12)=180

2(12x5)=120

2(5x5)=   50  

1(7x5) =  <u> 35   </u>

              483

               

6 0
3 years ago
Six times the sum of a number and 8 is 2
ehidna [41]
6(n+8)=2
6n + 48 = 2
6n + 48 - 48 = 2 - 48
6n = -46
N = -46/6
N = -7 2/3

4 0
3 years ago
In the same circle or in congruent circles:
Natali5045456 [20]

Answer:

congruent minor

Step-by-step explanation:

two congruent circle are corresponding minor

8 0
2 years ago
what is the equation of the line that is perpendicular to and has the same y intercept as the given line​
Artist 52 [7]

Answer:

y=5x+1

Step-by-step explanation:

step 1

Find the slope of the given line

we have

(0,1) and (5,0)

m=(0-1)/(5-0)

m=-1/5

step 2

Find the slope of the perpendicular line to the given line

we know that

If two lines are perpendicular, then the product of their slopes is equal to -1

m1*m2=-1

m1=-1/5

substitute

(-1/5)*m2=-1

m2=5

step 3

Find the equation of the line with slope m=5 and y-intercept (0,1)

The equation of the line into slope intercept form is equal to

y=mx+b

we have

m=5

b=1

substitute

y=5x+1

8 0
3 years ago
Other questions:
  • I have 3 math questions please help 30 points c:
    6·1 answer
  • PLEASE HELP!
    15·1 answer
  • How do u find the median if theres a uneven amount of numbers? what is the median of 1,1,2,2,3,3,5,6
    13·1 answer
  • W varies inversely as the square root of x when x=4 w=4 find when x=25
    11·1 answer
  • Please I just need 1,2 I’ll give brainlest ://
    13·1 answer
  • A cell phone is 84 mm long and 46 mm wide. What is the ratio of the widty to the length?​
    14·1 answer
  • James had “x” amount of jellybeans. Jordan had twice the amount of jellybeans than James. If they had a total of 72 jellybeans a
    9·1 answer
  • Can you guys please help me! 30 points
    14·2 answers
  • △HKO∼△FGO Two right triangles. The first triangle is labeled triangle HKO. Angle H is the right angle. Side KO which is the hypo
    6·1 answer
  • The descriptive statistics are shown.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!