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
rewona [7]
3 years ago
10

Ammeters produced by a manufacturer are marketed under the specification that the standard deviation of gauge readings is no lar

ger than 0.2 amp. One of these ammeters was used to make ten independent readings on a test circuit with constant current. The sample variance S 2 of these ten measurements is 0.0653 and it is reasonable to assume that the readings are normally distributed. Find the approximate probability that the sample variance will exceed 0.0653 if the true population variance is 0.04
Mathematics
1 answer:
AURORKA [14]3 years ago
8 0

Answer:

0.101

Step-by-step explanation:

Given that :

Standard deviation, s = 0.2

Sample variance, s² = 0.0653

Sample size, n = 10

Population variance = σ² = 0.04

We use the Chi square distribution :

(n - 1)s² / σ²

For P(s² ≥ 0.065)

(n - 1)s² / σ² = (10 - 1)*0.0653 / 0.04

(n - 1)s² / σ² = 0.585 / 0.04 = 14.625

P(s² ≥ 14.625) = 0.101 ( chi squee calculator).

You might be interested in
HELP ASAP. GIVING 20P AND BRAINLIEST
PilotLPTM [1.2K]

Answer:

B

Step-by-step explanation:

edge 2020

3 0
3 years ago
Read 2 more answers
3 apples at the store for $3.90. This week he purchased 5 apples for $6.50. WHAT IS THE THE EQUATION IN SLOPE INTERCEPT FORM FOR
qwelly [4]
To find the slope, use y2-y1/x2-x1
In this case, it is -7-3/4-(-1)
-10/5 
-2/1
That is the same as -2, so the answer is -2
4 0
3 years ago
9) Find the equation of a mirror line to the points Q (1,2) and Q1 (-1,2)<br><br>​
Harman [31]

Answer:

x = 0

Step-by-step explanation:

Q(1, 2 ) and Q1(- 1, 2 ) are both 1 unit from the y- axis

Q is 1 unit to the right of the y- axis and Q1 is 1 unit is 1 unit to the left of the y-axis, thus

The y- axis is the mirror line with equation x = 0

8 0
4 years ago
A set of dining room table and chairs is on sale for 50 off the original price. If $1400 was the price for the set of table and
kykrilka [37]
$2,800 because you would just add 1400 and 1400
4 0
3 years ago
The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard dev
Viefleur [7K]

Answer:

6.68% or 0.0668

Step-by-step explanation:

Mean sheet length (μ) = 30.05 inches

Standard deviation (σ) = 0.2 inches

In a normal distribution, for any length X, the z-score is determined by the following expression:

z=\frac{X-\mu}{\sigma}

For X = 29.75, the z-score is:

z=\frac{29.75-30.05}{0.2}\\z=-1.5

A z-score of -1.5 corresponds to the 6.68th percentile of a normal distribution.

Therefore, the probability that a sheet selected at random will be less than 29.75 inches long is 6.68%.

6 0
4 years ago
Other questions:
  • A population of 1,000 squirrels lives on a rectangle-shaped farm plot that is 25 feet long by 10 feet wide what is the populatio
    5·1 answer
  • Which function represents the given graph?
    7·2 answers
  • X² -3x +2 = 0<br><br> by quadratic formula
    11·1 answer
  • Adam calculates his annual commission, y, using the model y= 0.28x, where x represents his year. What is the meaning of the x-in
    5·1 answer
  • Geometry proof can anyone help
    15·1 answer
  • M: -1/2 Point: (-1, 3) Solve for y=mx+b<br> Help
    13·1 answer
  • HELP ASAP
    8·1 answer
  • Calculate the slope between (-12, 4) and (-14, 3).
    15·2 answers
  • Solve the inequality.<br> -3.25y &lt;-61.75
    10·1 answer
  • What is 25x2+8/5x21<br><br> Exact number no rounding
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!