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
Musya8 [376]
3 years ago
11

Use the given information to find the minimum sample size required to estimate an unknown population mean mu. How many students

must be randomly selected to estimate the mean weekly earnings of students at one college? We want 95% confidence that the sample mean is within $2 of the population mean, and the population standard deviation is known to be $99.
A) 8296
B) 6630
C) 9413
D) 13,302
Mathematics
1 answer:
babymother [125]3 years ago
5 0

Answer:

9413

Step-by-step explanation:

Given that :

Error = $2 ; Standard deviation (σ) =99 ; α = 95% = 0.95

Zα/2 = Z0. 05/2 = 1.96 (Z probability calculator)...

n = sample size

Recall:

n = ((Zα/2 * σ) / Error)^2

Using the formular above, the sample size n can be obtained ;

n = ((1.96 * 99) / 2)^2

n = 97.02^2

n = 9412.8804

n = 9413

You might be interested in
Lexi is going to the movies. She buys one ticket and one bag of popcorn and spends.a
CaHeK987 [17]

Answer:

ticket=10 Popcorn=5

Step-by-step explanation:

Because 10 is twice as large as 5

3 0
2 years ago
What effect does decreasing the temperature of a room have on a lifespan of a battery?
Leni [432]

This question is incomplete. There are options in the question (from reference) and no highlight in the red bolded text in the question.

What effect does decreasing the temperature of a room have on a lifespan of a battery?

Which variable is highlighted in red, bolded tex?  

a . Independent

b . Dependent

c . Control

d . None

But the answer to both the independent and dependent variables will be provided and explained in detail.

Answer:

Independent variable: decrease in temperature

Dependent variable: lifespan of battery

 Step-by-step explanation:

The independent variable in an experiment is defined as the variable that can be changed or manipulated in order to find an outcome while the dependent variable is defined as the variable that is influenced by the changes in the independent variable.

In the given example, a decrease in temperature  is the dependent variable as it is changing and the lifespan of battery  is the dependent variable as it is responding to the independent variable ?9decrease in temperature).

8 0
3 years ago
Pls answer these questions correctly for brainly
FinnZ [79.3K]

40 - 3k + 10k = -10 - 8k - 10

40 + 7k = -10 - 8k - 10

40 + 7k = -8k - 20

40 + 7k - 40 = -8k - 20 - 40

7k = -8k - 60

7k + 8k = -8k - 60 + 8k

15k = -60

15k/15 = -60/15

k = -4

8 0
3 years ago
Round 492.3069 to the nearest thousandth
Llana [10]
The answer is 492.307
The number after the thousandths is 9 - greater than 5 - so we round 6 up to 7.
4 0
3 years ago
Johnny can type 141 words in 2 minutes.at this rate,how many words can be typed in 10 minutes
Sergeu [11.5K]

Answer:

705

Step-by-step explanation:

141 words in 2 minutes means 70.5 words in a minute

70.5 × 10 = 705 words in 10 minutes

7 0
3 years ago
Read 2 more answers
Other questions:
  • Four of the test subjects are randomly selected without​ replacement, and they all had true negative test results
    5·1 answer
  • 30PTS only answer if you know please!
    7·1 answer
  • What is the answer to 5.48 * 15.12​
    15·2 answers
  • If 1 quart = 0.946 liters<br> How many quarts are in 7 liters??<br> Please answer!!
    10·1 answer
  • How to solve 4x-y=3<br> 3x+y=4 <br> using subsitution
    5·1 answer
  • Shelly spent 17 min washing the dishes and 38 min for cleaning her room.explain how you can mental math to find how long Shelly
    9·1 answer
  • Who likes my profile picture will mark branlist
    11·2 answers
  • calculate the effective yearly rate if an investment offers a nominal interest rate of 9.5% compounded quarterly​
    7·1 answer
  • Which expression is equivalent to 1/5 divided by 1/2
    14·1 answer
  • Investors buy a studio apartment for $180,000. Of this​ amount, they have a down payment of $36,000. Their down payment is what
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!