Question

4. Daniel orders a large supply of LEDs from two different suppliers. The probability that an LED from Adafun is defective is 0.02 and the probability that an LED from Sparkfruit is defective is 0.05. In a supply of 180 LEDs, 100 were obtained from Adafun and 80 were obtained from Sparkfruit.

a. What is the probability that an LED chosen at random from the 180 is from Adafun?

b. What is the probability that an LED chosen at random from the 180 is defective?

c. If the chosen LED is defective, what is the probability that it came from Adafun?

Answer #1

. A company buys a large number of a particular part from 3
different suppliers A, B, and C. Seventy percent comes from A, 20
percent from B, and the rest from C. One percent of the parts from
A are defective, 2 percent from B are defective, and 5 percent from
C are defective. (a) What is the probability that one of these
purchased parts selected at random is defective? (b) Given that a
part is defective, what is...

ADAFRUIT DOTSTAR LEDS RELATED
I bought two different LEDs from Adafruit because I thought my
first one was faulty. The Adafruit Dotstar 30 LED strip. One of the
LED strips has the 4 input pins on one side (the GND/VCC/DI/CL
pins) and 4 output slots on the other side. The other LED strip I
bought just has 4 input pins. But neither of them will light up for
whatever reason. I'm using a Sparkfun ESP8266 Thing Dev Board and
an...

I purchase parts from two different suppliers, A and
B. Testing the products they have sent I found that 35
of 80 parts from A are defective and 66 of 80 parts from B are
defective. Test at the 5% significance level that
pA=pB
Should you use a t or z test?
State the null hypothesis
Compute the test statistic
What is the confidence interval for
pA-pB

A dryer manufacturer purchases heating elements from three
different suppliers: Argostat, Bermrock, and Thermtek. Thirty
percent of the heating elements are supplied by Arostat, 50% by
Bermrock, and 20% by Themtek. The elements are mixed in a supply
bin prior to inspection and installation. Based on past experience,
10% of the Argostat elements are defective, compared to only 5% of
those supplied by Bermrock, and just 4% of those from Thermtek. An
assembly worker randomly selects an element for installation....

Solve the next 3 problems:
1) A tool manufacturing plant buys screws from three
different suppliers A. B and C. 50% is purchased from B and C in
equal parts, while the rest is acquired from A. If the percentage
of defective screws for A, B and C is 5%, 10% and 12%,
respectively. What is the probability that a defective screw will
be sold by B?
2) If two cards are drawn from a conventional 52-card
deck, what is...

Seventy percent of Mentor Products' spare parts inventory comes
from Adams Supply, the remaining 30% from Boulder Manufacturing.
Over the years, 4% of the Adams- supplied components have proven
defective, as compared to 7% of the Boulder parts. After purchase,
the parts are normally mixed together in a large storage bin until
they are needed. If you were to select a part at random from the
bin and test it:
a) Draw all probabilities on the branches reflect information we...

Two wine tasters rate each wine they taste on a scale of 1 to 5.
From data on their ratings of a large number of wines, we obtain
the following probabilities for both tasters' ratings of a randomly
chosen wine.
Taster 2
Taster 1
1
2
3
4
5
1
0.04
0.03
0.02
0.00
0.00
2
0.03
0.09
0.05
0.02
0.00
3
0.02
0.05
0.20
0.05
0.02
4
0.00
0.02
0.05
0.20
0.02
5
0.00
0.00
0.02
0.02
0.05
a....

Problem 4-11 (Algorithmic)
Edwards Manufacturing Company purchases two component parts from
three different suppliers. The suppliers have limited capacity, and
no one supplier can meet all the company’s needs. In addition, the
suppliers charge different prices for the components. Component
price data (in price per unit) are as follows:
Supplier
Component
1
2
3
1
$11
$12
$15
2
$11
$14
$11
Each supplier has a limited capacity in terms of the total
number of components it can supply. However,...

A package contains 4 light bulbs. The following table gives the
probability distribution (pdf) of the number of broken bulbs in the
package. A random package is selected. Use the table to answer the
following questions:
pdf for DRV
X
0
1
2
3
4
p(x)
0.66
0.20
?
0.05
0.02
What is the probability that there are exactly 2 defective
bulbs in a package?
What is the probability that there are at most 2 defective
bulbs in a package?...

Benson Manufacturing is considering ordering electronic
components from three different suppliers. The suppliers may differ
in terms of quality in that the proportion or percentage of
defective components may differ among the suppliers. To evaluate
the proportion defective components for the suppliers, Benson has
requested a sample shipment of 500 components from each supplier.
The number of defective components and the number of good
components found in each shipment is as
follows.
Supplier
Component
A
B
C
Defective
10
30...

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