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
QveST [7]
3 years ago
5

Scores on a standardized test are normally distributed with a mean of 250 and a standard a deviation of 20. Approximately what p

ercent of students scored between 260 and 280? Round to the nearest percent
Mathematics
1 answer:
masha68 [24]3 years ago
5 0

Answer:

You can't answer this properly without more data.

You might be interested in
Is 50.2 a rational or an irrational number, why?
Greeley [361]

Answer:

Rational.

Step-by-step explanation:

\textbf{A rational number is a real number that can be expressed as}~ \dfrac{p}{q},\\\\\textbf{where}~ p~ \textbf{and}~ q~ \textbf{are integers.}\\\\ \boxed{50.2 = \dfrac{502}{10}}\\\\ \textbf{50.2 can be expressed as a ratio of two integers,}~ \textbf{so it is a rational number.}

4 0
2 years ago
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data
LuckyWell [14K]

Answer:

(25.53, 37.87): 95% CI

(23.59, 39.81): 99% CI

Step-by-step explanation:

The margin of error of a confidence interval is given by:

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

z is related to the confidence level. The higher the confidence level, the higher the values of z, and thus, we wider the confidence interval is.

In this question:

The narrower C.I. is the 95%, and the wider is the 99%. So

(25.53, 37.87): 95% CI

(23.59, 39.81): 99% CI

4 0
3 years ago
AO
iogann1982 [59]

Answer: Summer Math Packet for Students Entering Algebra 2. 1. Percentages ... E) -15+6 = -9 f). 35:-7 = 5 g. 3[2(6+1)-32). 1+(22-1)+1. 1 = 3 h). 4:3 =

Step-by-step explanation: Good luck!

3 0
2 years ago
NEED HELP 45 POINTS PLZ
miskamm [114]

Answer:

I have given the answer in the chat box as i was not able to post officialy

Step-by-step explanation:

6 0
2 years ago
(5-3i)+(4+2i) what is the solution ?​
Vaselesa [24]

Answer:

−14+22i

Step-by-step explanation

yourwelcome

7 0
3 years ago
Read 2 more answers
Other questions:
  • Y=6x-3<br> y=2x-7<br><br> Solve using substitution please
    7·1 answer
  • 1. Draw a set of railroad tracks such that the lengths of horizontal ties form a geometric sequence.
    12·1 answer
  • What is the value of y in the equation 1/8• y=4
    7·2 answers
  • Help please and need to show the work!
    6·1 answer
  • a shower head use is about 6 gallons of water per minute given m, the number of minutes write an equation that can be used to fi
    12·1 answer
  • Apply the elimination method to solve the system of equations 2x+6y=8 and 3x+2y=2 which three statements are correct
    15·1 answer
  • Cuanto es 50 gramos en kilos por fa
    7·2 answers
  • THIS IS ME WHEM I AM SMALL CUTE RIGHT?​
    10·2 answers
  • Carlos ran 23.7 miles less than Lisa last week. Carlos
    15·1 answer
  • Una heladeria dispone de 20 frutas distintas para elaborar sus malteadas. Si los clientes pueden elegir tres sabores para mezcla
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!