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
Artemon [7]
3 years ago
7

A random sample of five Galaxy 8 smartphones is selected from the production line after final assembly, and the result of the we

ight control measurement is (in grams) 155.1, 154.8, 155.5, 155.3, and 154.6.What are the average weight, its uncertainty (i.e. the standard deviation of the mean), and the fractional uncertainty

Mathematics
1 answer:
Dmitrij [34]3 years ago
7 0

Answer:

a. Mean = 155.1 grams

b. Standard deviation = 0.37

c. Fractional uncertainty = 0.074

Step-by-step explanation:

a. Average weight

This is same as the mean weight;

Mathematically, that would be; sum of the weights/ the number of weights

= (155.1 + 154.8 + 155.5 + 155.3 + 154.6)/5 = 775.3/5 = 155.06 which is approximately 155.1

b. Standard deviation

Mathematically; we calculate that using the formula;

√{(x-mean)^2/(N-1)}

Please check attachment for for the complete breakdown of this

c. Fractional uncertainty

= Standard deviation/number of measurements = 0.37/5 = 0.074

You might be interested in
Five less than four times a number is nine more than twice a number
Leokris [45]
5-4a=9+2a
Hope this help
7 0
3 years ago
Read 2 more answers
A direct relationship occurs when
amid [387]
A direct relationship requires a change in the same direction of both variables, answer c.
4 0
3 years ago
Draw a triangle that is both a right triangle and an isosceles triangle. You can use either pencil and paper, or a draw program.
dem82 [27]
2. measurements can be any to complementary angles.
   for example, 60 & 30
3. the 2 sides are equal. Since it is an isosceles triangle.
4.an equi.triangle can never be right angled. Since, all angles are 60° in an             equi.triangle.
5. right triangle can never have an obtuse angle since one angle is already          90°. therefore the other two agles are supposed to be acute angles.[ since        sum of all angles in a triangle is 180°]
6 0
3 years ago
Suppose you have a cache of radium, which has a half-life of approximately 1590 years. how long would you have to wait for 1/5 o
lubasha [3.4K]
<span>You would have to wait 318 years for 1/5 (20%) of the Radium to disappear. 1590 is the point where half of the Radium would decay, so if you take 20% of that, it would equate out to 318 years. Radium has a long half life!</span>
4 0
3 years ago
Please help I'm a little confused!
zaharov [31]

I will have "x" represent the unknown number, or you could use a "?", doesn't matter.

8\leq \frac{x}{-4}     [8 is less than or equal to (≤) the quotient (÷) of a number and -4, so the number is being divided by -4]

If you need to solve this, you need to isolate/get the variable "x" by itself in the inequality:

8\leq \frac{x}{-4}   Multiply -4 on both sides to get rid of the fraction and get "x" by itself

(-4)8\geq \frac{x}{-4} (-4)    When you multiply/divide by a negative number, you flip the sign (< >)

-32 ≥ x          [-32 is greater than or equal to x, or x is less than or equal to -32]

8 0
3 years ago
Other questions:
  • Can some one help me in this problem
    9·1 answer
  • What is 8.723 in word form
    9·2 answers
  • Phyllis invested 47000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 6
    12·1 answer
  • If f(x) =1/4x+3, what is the equation for f^-1 (x)?
    14·1 answer
  • Find the value of m and n, if 6*12^m=9^4*2^n
    13·1 answer
  • A quarter has a diameter of 2.4. if it makes 8 rotations how far did it roll
    10·2 answers
  • What is the length of the missing side of this right triangle?
    13·2 answers
  • What is the area of this figure?
    9·1 answer
  • Which decimal is equivalent to -3 1/8? *20 points*
    8·1 answer
  • A scientist was in a submarine below sea level, studying ocean life. Over the next ten minutes, she dropped 24.9 feet. How many
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!