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UNO [17]
3 years ago
8

A company wishes to monitor the variation in the length of time it takes to process and send a bill to a customer. Seven bills w

ill be randomly selected each day for a 60-day period and the length of time it takes to process and send the bill to a customer will be recorded for each bill. The appropriate control chart is a(n):
Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
5 0

Answer:

R - chart

Step-by-step explanation:

Range chart (R chart) is a control chart used for processes with two or more subgroups to determine if a process is stable or not. It monitors the mean and range of a normally distributed variable simultaneously collected at regular intervals during a given time. It is used when measuring small subgroups between two and ten at regular intervals from a process. Iy is a;so used for constant subgroups.

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Write the equation of the line that passes through the points (-7, 7) and (-6, -5).
defon

Answer:

y = -12x - 77

Step-by-step explanation:

The standard form of the equation is expressed as y = mx+b

m is the slope

Given the coordinate (-7, 7) and (-6, -5).

m = -5-7/-6+7

m = -12/1

m = -12

Get the intercept b

Substitute m= -12 and (-7 7) into y = mx+b

7 = -12(-7) + b

7 = 84 + b

b = 7 - 84

b = -77

Get the required equation

y = mx+b

y = -12x +(-77)

y = -12x - 77

This gives the required equation

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2 years ago
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The number that expresses 6.72 as a fraction is simplest form is...

6.72= 168/25

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3 years ago
Select all that apply to describe the association of this scatterplot
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Which of the following describes the graph of y = x² - 225?
lara [203]

Answer:

option 4. The graph has zeroes at x = 15 an x = -15 and it opens upward.

Step-by-step explanation:

we have

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This is the equation of a vertical parabola open upward (the leading coefficient is positive)

The vertex represent a minimum

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square root both sides

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Step-by-step explanation:

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