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
svet-max [94.6K]
3 years ago
9

The lengths of text messages are normally distributed with a population standard deviation of 3 characters and an unknown popula

tion mean. If a random sample of 24 text messages i taken and results in a sample mean of 27 characters, find a 99% confidence interval for the population mean. Zo.10Z0.0520.025 Zo.01 Z0.005 1.282 1.645 1.960 2.326 2.576 You may use a calculator or the common z values above. Select the correct answer below: a.(26.21,27.79) b.(25.99.28.01) c.(25.93,28.07)
Mathematics
1 answer:
slava [35]3 years ago
5 0

Answer:

25.4, 28.6

Step-by-step explanation:

Given parameters

sample size, n = 24

sample mean, X = 27

population standard deviation, s = 3

critical value, Zα/2, where α = 0.01

99% confidence Interval, CI, is given as follows

CI = X ± Zα/2 × (s/√n)

Zα/2 = Z0.01/2 = Z0.005 = 2.576

CI = 27 ± 2.576 × (3/√24)

   = (25.42 ,28.57)

You might be interested in
A box of cereal contains 512 grams of sugar
sasho [114]
Then? You didn't type the full question
3 0
3 years ago
Selma cannot remember her locker number! She knows that her locker number is prime, and that it is a factor of 435. What are all
tatuchka [14]

Answer:

Possible locker numbers for Selma are: 3, 5 and 29

Step-by-step explanation:

First of all, let us have a look at the definition of a prime number.

A <em>prime number</em> is a number which is divisible either by 1 or the number itself.

No other number divides the prime number other than 1 and the number itself.

Now, let us factorize the given number 435 and let us observe the what all possibilities are there.

435 = 3\times 145

Factorizing 145 further:

435 = 3\times 5\times 29

No further factors are possible.

Therefore 3, 5 and 29 are the prime factors of 435.

So, the answer is:

Possible locker numbers for Selma are: 3, 5 and 29

3 0
3 years ago
Hi there!
ExtremeBDS [4]
The answer is in my attachment

6 0
3 years ago
The coordinates of the intersection of two lines on a graph represent the values of__ and __ when you solve the system of equati
Neko [114]

Answer:

The coordinates of the intersection of two lines on a graph represent the values of <u>x</u> and <u>y</u> when you solve the system of equation.

Step-by-step explanation:


4 0
3 years ago
Copy and complete statement
irakobra [83]

Answer:

sqrt(64) > 5

Step-by-step explanation:

sqrt(64) = 8; therefore

sqrt(64) > 5

3 0
3 years ago
Other questions:
  • Wilma used 25 square cm. of construction paper to make a card in the shape of a square. She put a lace border around the card. H
    11·1 answer
  • Interpret the results in the context of your original research question. Do your analyses support your expected findings? Explai
    9·1 answer
  • Approximate each square root to the nearest tenth<br><br> 130<br><br> 85
    12·2 answers
  • M is the midpoint of AN, A has coordinates (7, -4) and M has coordinates (3, 2) Find the coordinates of N.
    9·1 answer
  • Create a list of steps, in order, that will solve the following equation. <br> 2(x+2)^2-5=93
    14·2 answers
  • Which ordered pair is a solution of the equation? <br>equation (-4x+7=2y-3)
    13·2 answers
  • The formula for area of a triangle is A = 0.5bh. The formula for the volume of a prism is V = Bh. What does the B in the right p
    5·1 answer
  • Need help here plss
    14·1 answer
  • Put these algebraic expressions into verbal expressions and Coefficient/Variables
    12·1 answer
  • Solve for x to the nearest tenth!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!