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
MAVERICK [17]
3 years ago
9

The age of some lecturers are 42,54,50,54,50,42,46,46,48 and 48 calculate the mean age and standard deviation

Mathematics
1 answer:
rjkz [21]3 years ago
3 0

Answer:

Mean age: 48

Standard deviation: 4

Step-by-step explanation:

a) Mean

The formula for Mean = Sum of terms/ Number of terms

Number of terms

= 42 + 54 + 50 + 54 + 50 + 42 + 46 + 46 + 48+ 48/ 10

= 480/10

= 48

The mean age is 48

b) Standard deviation

The formula for Standard deviation =

√(x - Mean)²/n

Where n = number of terms

Standard deviation =

√[(42 - 48)² + (54 - 48)² + (50 - 48)² +(54 - 48)² + (50 - 48)² +(42 - 48)² + (46 - 48)² + (46 - 48)² + (48 - 48)² + (48 - 48)² / 10]

= √-6² + 6² + 2² + 6² + 2² + -6² + -2² + -2² + 0² + 0²/10

=√36 + 36 + 4 + 36 + 4 + 36 + 4 + 4 + 0 + 0/ 10

=√160/10

= √16

= 4

The standard deviation of the ages is 4

You might be interested in
Plot x and y intercept of Y=1/3x-1
olganol [36]

The x intercept is 3 and the y intercept is -1.

The graph would look something like the image below.

Hope this helped you!

5 0
3 years ago
Find the fourth term in the expanded form of (5x + 1)4.
Orlov [11]
5X plus one plus positive four equals -247
5 0
2 years ago
Find the approximate area of a semi circle with a radius of 6 cm
Trava [24]

113.04  es la respuesta, ya que para sacar el area es Pi por el radio al cuadrado osea 3.14 por 36, denada

3 0
2 years ago
I will give brainiest to whoever answers correctly !!
Juliette [100K]

Answer:

75.99

Step-by-step explanation:

6 0
2 years ago
Based on the diagram shown, all of the following are true statements except
ira [324]

You are correct. The answer is choice C.

The other choices A, B, D have each side add up to 180 degrees either because the angles are a linear pair (adjacent and supplementary) or because the angles are same side interior angles. Same side interior angles are supplementary if a transversal line cuts through a pair of parallel lines as so happens in this diagram.

6 0
3 years ago
Read 2 more answers
Other questions:
  • The base of an exponential function cannot be a negative number true or false
    5·2 answers
  • An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and hav
    6·1 answer
  • Simplify.
    15·2 answers
  • dan went to the hardware store and bought 5 yellow ropes. The total length of the ropes was 331.75 meters. How long was each rop
    13·1 answer
  • Jane and Joan are twins. They both went to work at age 25 with similar jobs, and at the end of each year they will be receiving
    9·1 answer
  • A prism with a volume of 270 m³ is dilated by a factor of 3. What is the volume of the dilated prism? Enter your answer in the b
    9·2 answers
  • 2/5(10x+7y I need help in this Question
    5·1 answer
  • NeNe tripled a cookie recipe for a party. The original recipe called for 4.25 cups of sugar. NeNe tripled the sugar amount and p
    12·2 answers
  • 5. To have integrity means that you A. usually tell the truth B. only cheat when it's necessary C. are honest and trustworthy D.
    13·1 answer
  • Kevin invest $2,000 at 4.6% compounded continuously. How long will it take him to have $3,700
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!