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
Dafna11 [192]
3 years ago
11

When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus

how many sigma?
Mathematics
1 answer:
Blababa [14]3 years ago
5 0

Answer:

By the Empirical Rule, \pm 3\sigma

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

The symbol of a standard deviation is \sigma. So

When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus how many sigma?

By the Empirical Rule, \pm 3\sigma

You might be interested in
Find the slope (2,5) and (6,2)
Drupady [299]

Answer:

slope =<u>-3</u>

            4

Step-by-step explanation:

slope = <u>y2 - y1</u>

            x2 - x1

        =<u>2 - 5</u>

          6 - 2

       = <u>-3</u>

          4

5 0
3 years ago
A nurse at a local hospital is interested in estimating the birth weight of infants. how large a sample must she select if she d
enyata [817]
For large sample confidence intervals about the mean you have: 

xBar ± z * sx / sqrt(n) 

where xBar is the sample mean z is the zscore for having α% of the data in the tails, i.e., P( |Z| > z) = α sx is the sample standard deviation n is the sample size
 
We need only to concern ourselves with the error term of the CI, In order to find the sample size needed for a confidence interval of a given size.

z * sx / sqrt(n) = width. 

so the z-score for the confidence interval of .98 is the value of z such that 0.01 is in each tail of the distribution. z = 2.326348 

The equation we need to solve is:
z * sx / sqrt(n) = width 
n = (z * sx / width) ^ 2. 
n = ( 2.326348 * 6 / 3 ) ^ 2 
n = 21.64758 

Since n must be integer valued we need to take the ceiling of this solution.
n = 22 
7 0
3 years ago
How does the graph of y = sec(x + 3) – 7 compare with the graph of y = sec(x)?
Alla [95]

Answer:

The function y = sec(x) shifted 3 units left and 7 units down .

Step-by-step explanation:

Given the function: y = sec(x)

  • If k is any positive real number, then the graph of f(x) - k is  the graph of y = f(x) shifted downward k units.
  • If p is a positive real  number, then the  graph of f(x+p) is  the graph of y=f(x)  shifted to the left  p units.

The function y = \sec(x+3)-7 comes from the base function y= sec(x).  

Since 3 is added added on the inside, this  is a horizontal shift Left 3 unit, and since 7 is subtracted on the outside, this is a vertical shift  down 7 units.

Therefore, the transformation on the given function is shifted  3 units left and 7 units down


3 0
3 years ago
Read 2 more answers
4. Eva saves $60 each week. Since she needs to save at least $2,400 to go on a trip to Europe, she will need to
Anon25 [30]

Answer:

where is the question so that I can solve it

4 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!
Katena32 [7]

Answer:6018

Step-by-step explanation:

Given Sequence

-282-266-250-234.....

It represent an A.P. with

first term a=-282

common difference d=16

So sum of 51 term

S_n=\frac{n}{2}[2a+(n-1)d]

S_{51}=\frac{51}{2}\times [2\times (-282)+(51-1)16]

S_{51}=\frac{51}{2}\times [-564+800]

S_{51}=\frac{51}{2}\times [236]

S_{51}=51\times 118

S_{51}=6018

7 0
3 years ago
Other questions:
  • Twice a number increased by three times the number?
    10·2 answers
  • How do you begin isolating the variable x to one side of the equation?
    12·1 answer
  • Can someone help me for brainllest ITS TIMED AND IM FREAKING OUT
    7·1 answer
  • What is another way to write this number 300+ 70+5/10+8/100
    5·1 answer
  • Solve the equation for Y<br> 2x + y = -9
    7·2 answers
  • PLS HELP<br><br> How many solutions does this system of equations have?<br> y= -6x-7<br> y=-6x-7
    14·1 answer
  • Evaluate the expression xyz + 7, if x = -3, y = 4, z = 7
    8·2 answers
  • Solve Ax − By = C for x.
    5·1 answer
  • Help me please!! This is timed and I’m stuck
    11·2 answers
  • Please answer the given question
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!