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
ale4655 [162]
11 months ago
15

the brain volumes ​(​) of 50 brains vary from a low of to a high of . use the range rule of thumb to estimate the standard devia

tion s and compare the result to the exact standard deviation of ​, assuming the estimate is accurate if it is within 15
Mathematics
1 answer:
Sloan [31]11 months ago
5 0

The estimated standard deviation from the range rule is 145.5 cm3.As it is 29.8 cm3 smaller than the exact standard deviation, we consider that the estimation is not accurate enough.

Generally, brain volumes which are smaller than 921.1 cm3 can be considered significantly low and bigger than 1417.5 cm3 can be considered significantly high. Hence, brain volume of 1457.5 cm3 is bigger than the expected maximum, so it can be considered significantly high.

The calculation goes like this,

According to the range rule, the standard deviation and range, or the distance between the maximum and smallest value, are roughly inversely proportional:

s=R/4

If we have a sample of 50 brains volumes, and they range from 910 cm3 to 1492 cm3, we can estimate the standard deviation as:

s=max-min/4

s=1492-910/4=582/4=145.5

The exact standard deviation is 175.3 cm3.The difference is 175.3-145.5=29.8 cm3, so the estimation is not accurate enough.

The range rule of thumb states that we should anticipate a maximum value that is approximately two standard deviations above the mean and a lowest value that is approximately two standard deviations below the mean. The expected ranges are as follows given our mean volume of 1169.3 cm3 and standard deviation of 124.1 cm3:

Min= M-2s=1169.3-2*124.1=921.1

Max=M+2s=1169.3+2*124.1=1417.5

The brain capacity of 1457.5 cm3 can be regarded as significantly high because it is higher than the predicted maximum.

To know about standard deviation click here :

brainly.com/question/23907081

#SPJ4

You might be interested in
On a blueprint, the scale indicates that 7 cm represent 16 ft. What is the length of a room that is 9.8 cm long and 5 cm wide on
Ira Lisetskai [31]
The room is 22.4 feet long

7cm=16ft
9.8cm=?ft

  7cm       9.8cm
______=______
  16ft          x ft

Cross multiply
7x=156.8
divide both sides by 7
x=22.4 ft


3 0
3 years ago
Read 2 more answers
I need help with math if you don't know the answer get out of the question and don't answer it and give the wrong answer or some
velikii [3]

Answer:

Step-by-step explanation:

Frequency table for the height of the seedlings,

Height (in inches)        Number of seedlings

          \frac{1}{2}                                      2              

          \frac{3}{4}                                      4

          \frac{5}{8}                                      2

          \frac{7}{8}                                      2

Now we can draw the line plot as attached.

Average height of the seedlings = \frac{2(\frac{1}{2})+4(\frac{3}{4})+2(\frac{5}{8})+2(\frac{7}{8})}{2+4+2+2}

                                                      = \frac{1+3+1.25+1.75}{10}

                                                      = \frac{7}{10}

3 0
3 years ago
- 1/5[y+x]<br> whats the answer
stiv31 [10]

Answer:

i aint never seen 2 pretty best friends always one of them gotta be ugly....

Step-by-step explanation:

4 0
3 years ago
Daria has 8 pages in her scrapbook. There are 4 pictures
jek_recluse [69]
32 pictures in the scrapbook because 8 x 4
6 0
3 years ago
Read 2 more answers
Ms. Ramo's thumb measures 4 cm. Express this length in meters
Natalija [7]

Answer: 0.04 meters

Step-by-step explanation:

Convert cm to meters by dividing the length by 100.

4/100= = 0.04

6 0
3 years ago
Read 2 more answers
Other questions:
  • A machine produces
    14·1 answer
  • Based on the graph below, what is the total number of solutions to the equation f(x) = g(x)? graph of function f of x equals 2 m
    14·2 answers
  • Mo-Qui has studied Spanish for half an hour longer than he studied History.
    14·1 answer
  • Ruby bought 15 cell phone cases for a total of $145.80. she sells them for $19.50 each, but she is only able to sell 5 of them.
    9·1 answer
  • Two buildings are 12m apart on the same horizontal level. From the top of the taller building, the angle of depression of the bo
    12·1 answer
  • Pl help I will give you Brainly
    11·1 answer
  • Share 56 sweets in the ratio 2 : 5.
    10·1 answer
  • What is the ratio of cosine of C?<br><br> A 24/7<br><br> B 24/25<br><br> C 7/25<br><br> D 25/24
    14·1 answer
  • A battery company produces 12,000 batteries per day. Each day they randomly select 50 to test. If they find that 1 is dead, how
    12·1 answer
  • Francesca leaves her home and Drive South 150 km. Then she drives West 70 km. At this point, she drives North 30 km. Finally, sh
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!