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
Art [367]
2 years ago
6

Let x1, x2, ...x64 be a random sample from a distribution with mean 64 and standard deviation 4. then mean and the standard devi

ation of the sample mean are:
Mathematics
1 answer:
VARVARA [1.3K]2 years ago
7 0

The mean of sample means is the same as the mean of the underlying distribution.


The standard deviation of sample means is the original distribution sample mean divided by the square root of the number of samples.


Mean of sample mean distribution: 64

SD of sample mean distribution: 4/√64 = 1/2

You might be interested in
16. Suppose Eva has 12 3/4 pounds of flour. The day's baking will require triple that amount.
egoroff_w [7]

Answer:

Option D

Step-by-step explanation:

Given the following question:

12 \frac{3}{4} \times3

In order to find the answer, we have to convert the mixed number and then multiply by three, since how Eva needs triple the amount for today's baking.

12 \frac{3}{4} \times3
12\frac{3}{4} =4\times12=48+3=51=\frac{51}{4}
3=\frac{3}{1}
\frac{51}{4} \times\frac{3}{1}
51\times3=153
4\times1=4
=\frac{153}{4}

<u>Convert the improper fraction back into a mixed number:</u>

\frac{153}{4}
\frac{153}{4} =153\div4=38\frac{1}{4}
=38\frac{1}{4}

Which means Eva needs "38 1/4 pounds of flour" or option D for today's baking.

3 0
2 years ago
An equation and the steps to solve it are shown below:
Elan Coil [88]
Hello,

2x - one over four of (12x + 4) = 3
must be written:
2x-1/4 *(12x+4)=3
And we see a sign '-' before 1/4.

Step 1:
2x-(3x+1)=3 or 2x-3x-1=3 and not 2x+3x-1=3

Answer A
since  Step 1, because incorrect signs have been used








And here, Mehek are there sufficients explanations?


4 0
2 years ago
Read 2 more answers
WILL MARK YOU AS BRAINLIEST!!!!!!!!!! PLEASE HELP DUE TODAY AT 1 :(((((
Alika [10]

Answer: here is a app to use  

Socratic by Google

Step-by-step explanation:

 

Socratic by Google its on iphone and sumsung

5 0
3 years ago
Find the circumference of the circle in terms of pi? [30]
son4ous [18]

Answer:

60π

Step-by-step explanation:

If the circle has radius of 30 units, substitute r=30 into the formula C = 2πr.

C = 2π(30)

C = 60π

3 0
3 years ago
Read 2 more answers
Which of the following represents x =1/3y written in general form?
Serhud [2]

If you would like to write x = 1/3 * y in general form, you can do this using the following steps:

The general form of the equation is: ax + by + c = 0.

x = 1/3 * y

x - 1/3 * y = 0


The correct result would be x - 1/3 * y = 0.

4 0
3 years ago
Other questions:
  • What is 13 out of 25 as a percentage
    15·2 answers
  • Ping is buying a sandwich for $5.95 and a bottle of juice for $1.75. He is going to pay with a $10 bill.
    15·2 answers
  • In the sum of two numbers is 15 and the product is 56, what are the two numbers?
    14·1 answer
  • Please answer this in two minutes
    13·1 answer
  • Aundrey is buying supplies for school. She buys a new calculator, some books and a notebook. The prices of the ideals are listed
    12·1 answer
  • A skateboarder went a kilometer in 3 minutes with the wind, and returned in four minutes against the wind.
    13·1 answer
  • Matter is in a liquid state when its temperature is between its melting point and its boiling point. Suppose that some substance
    10·1 answer
  • A chandelier was marked up 150% from an original purchase cost of $92. Yesterday, Jayce sold the chandelier, earning a 20% commi
    13·1 answer
  • 2) Solve the linear equation 2(3x + 2) = 2x - 1+x
    15·1 answer
  • 6x+9=45 how do you solve it
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!