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
ikadub [295]
3 years ago
9

a. A simple random sample of size 80 has a mean of 7.31. The population standard deviation is 6.26. Construct a 99% confidence i

nterval for the population mean
Mathematics
1 answer:
Sever21 [200]3 years ago
5 0

Answer:

5.503484≤x≤9.116516

Step-by-step explanation:

The formula for calculating the CI is expressed as;

CI = x±z*s/√n

x is the mean= 7.31

z is the 99% z-score = 2.58

s is the standard deviation = 6.26

n is the sample size = 80

Substitute into the formula

CI = 7.31± 2.58*6.26/√80

CI = 7.31± 2.58*6.26/8.94

CI = 7.31± (2.58*0.7002)

CI = 7.31±1.806516

CI = (7.31-1.806516, 7.31+1.806516)

CI = (5.503484, 9.116516)

Hence the 99% confidence interval for the population mean is

5.503484≤x≤9.116516

You might be interested in
Have a great day
PtichkaEL [24]

Answer:

Mine is starburst

Step-by-step explanation:

5 0
3 years ago
John and 3 friends are going out for pizza for lunch. They split one pizza and 4 large drinks. The pizza cost $13.00. After usin
Katena32 [7]
The large drink will cost 1.55. 
5 0
4 years ago
Read 2 more answers
P is the set of integers that are greater than or equal to -3 a d less than -1
rjkz [21]
To represent this statement I put it in an expression thingy -3 ⩽ p <1
8 0
3 years ago
Find the length of the longer side of rectangle ABCD in the graph.
labwork [276]
9 units is the answer
8 0
3 years ago
Read 2 more answers
The ratio of boys to girls in a class is 4:5 what fraction of the class is boys and what fraction of the class is girls
ale4655 [162]
First, let's start off with the information we already have. Since the ratio is 4 boys to 5 girls, there has to be a minimum of 9 students (4 being boys and 5 being girls).

9 will be the denominator of both of our fractions since the boys and girls are in the same class.

The fraction of boys in the class is 4/9 (since there are 4 boys to 5 girls in a class of 9, we would write 4 over 9) and the fraction of girls in the class is 5/9.

This is a simplified version of the fractions. If this is a multiple-answer question and 4/9 and 5/9 are not up there, try multiplying the fractions with different numbers and see what fractions will be correct. 

But either way, 4/9 and 5/9 are correct :)

7 0
3 years ago
Read 2 more answers
Other questions:
  • Sergio has two similar cylindrical pots, Pot A and Pot B. The radius of Pot A is 15 inches, and the radius of Pot B is 3 inches.
    13·1 answer
  • How do you solve a constant rate problem?
    11·1 answer
  • Simplify the following expression.<br> 938 + (-158)
    9·2 answers
  • simplify the radical expression the square root of 63x to the 15th power y to the 9th power divided by 7xy^11
    14·1 answer
  • Which congruence theorem can be used to prove △MLQ ≅ △NPQ?<br><br> AAS <br> SSS <br> ASA <br> SAS
    8·2 answers
  • Write -2.42 as a fraction in simplest form?
    8·2 answers
  • The Ivring Berlin Learning Center would like a possible net profit of $650,000 on its new resource manual it sells to schools. T
    14·1 answer
  • What is the difference between 4/5 and 3/8
    8·2 answers
  • Find the area of the figure shown: <br>-35<br><br>-105<br><br>-70<br><br>-no enough information.​
    6·2 answers
  • Raven is building a new planter for her class garden.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!