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
mash [69]
3 years ago
7

Mrs. Alberts has taught seventh grade math for thirty years. Every year she calculates and records the class average on the fina

l exam. The following dot plot represents these average scores from the past thirty years.
Calculate the mean of the average scores and round this value to the nearest whole number. Then, calculate the mean absolute deviation of the scores (using the rounded mean) and round it to the nearest whole number, as well. Express your answer as a numerical value.
MAD=

Mathematics
1 answer:
sdas [7]3 years ago
5 0

Answer:

2

Step-by-step explanation:

89.633333333333

Mean Absolute Deviation (MAD): 2.0755555555556

rounding these both you get 90 and 2.

You might be interested in
melanie spent 4 hours babysitting, charges $16 and then charge per hour. the total she earns can be represented like this $4x+$1
timurjin [86]
$6.50 per hour of babysitting
3 0
3 years ago
Identify whether the given equation is quadratic or not quadratic<br><br>tabang nars​
cluponka [151]

Answer:

I assume not

Step-by-step explanation:

8 0
3 years ago
Assume the heights in a male population are normally distributed with mean 70.3 inches and standard deviation 4.1 inches. If a r
klemol [59]

Answer:

73.1 inches

Step-by-step explanation:

We solve for this using z score formula.

z-score is z = (x-μ)/σ,

where x is the raw score,

μ is the population mean

σ is the population standard deviation.

x = unknown = randomly selected male's height

μ = 70.3 inches

σ = 4.1 inches

z = is not given but we are given its percentile which is 75

The z score for a 75th percentile = 0.674

Hence,

0.674 = x - 70.3/4.1

Cross Multiply

0.674 × 4.1 = x - 70.3

2.7634 = x - 70.3

x = 70.3 + 2.7634

x = 73.0634 inches

The height of the randomly selected male = 73.0634

Therefore, the height of the randomly selected male to the nearest tenth of an inch is 73.1 inches

7 0
3 years ago
The circumference of Fis 120 cm. What is the length of DË (the minor<br> arc)?
Afina-wow [57]

Answer:

15cm

Step-by-step explanation:

Let x be the arc circumference.

The circumference  of a circle usually subtends to 360°, that is, one complete revolution is 360°.

#Given the arc angle as 45° and the  circumference as 120cm, the arc circumference can be obtained as:

#Apply proportions to find x:

360\textdegree=120cm\\45\textdegree=x\\\\x=(120/360)\times 45\\\\x=15cm

Hence, the arc circumference is 15cm

6 0
3 years ago
The equation of a circle whose center is at (1,2) and radius is 5 is (x + 1)² + (y + 2)² = 5 (x - 1)² + (y - 2)² = 25 (x - 1)² -
Oksana_A [137]
\bf \textit{equation of a circle}\\\\ &#10;(x- h)^2+(y- k)^2= r^2&#10;\qquad &#10;center~~(\stackrel{1}{ h},\stackrel{2}{ k})\qquad \qquad &#10;radius=\stackrel{5}{ r}&#10;\\\\\\\&#10;(x-1)^2+(y-2)^2=5^2\implies (x-1)^2+(y-2)^2=25
7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the measure of angle abc if arc ac is 130 and arc de is 40
    8·1 answer
  • Sin o = - 2/2<br> Select all angle measures for which
    12·1 answer
  • A middle school has a speech club with a total of 18 students. The ratio of girls to boys is 4:5. How many girls are in the spee
    7·1 answer
  • How much will each fifth grader spend on lunch?
    12·2 answers
  • Solve the equation: x+33=40
    13·1 answer
  • Jacob is training for a marathon. His plan is to run the same distance for 3 days a week, then increase that distance by the sam
    9·2 answers
  • The ratio of three angle are 3:4:5 <br>what is the highest angle of the triangle??
    10·1 answer
  • Nick invests $3,500 in an account earning 11% interest compounded annually. Krista invests $4,000 in an account earning 4% inter
    15·2 answers
  • What is the measure of
    15·1 answer
  • How i do this and please give me answer too
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!