Question
In: Statistics and Probability
13 refrigerators of a certain type has been returned to a distributor - 8 of these...
13 refrigerators of a certain type has been returned to a distributor - 8 of these refrigerators have a defective compressor and 5 have less serious problems. A sample (without replacement) of 6 refrigerators are examined in random order, let X be the number of refrigerators with defective compressor among the examined ones. Answer all questions to 3 decimal places.
P(X = 4) =
| Tries 0/5 |
P(2 < X ≤ 4) =
| Tries 0/5 |
What is the expected number of refrigerators with defective compressor among the examined ones?
| Tries 0/5 |
What is the standard deviation of number of refrigerators with defective compressor among the examined ones?
Solutions
orchestra answered 1 year agoRelated Solutions
Each of 12 refrigerators of a certain type has been returned to a distributor because of...
Each of 12 refrigerators of a certain type has been returned to
a distributor because of an audible, high-pitched, oscillating
noise when the refrigerators are running. Suppose that 7 of these
refrigerators have a defective compressor and the other 5 have less
serious problems. If the refrigerators are examined in random
order, let X be the number among the first 6 examined that have a
defective compressor.
(a) Calculate P(X = 4) and P(X ≤ 4).
(b) Determine the probability...
An investment has returned 13%, 6%, -7%, 4%, and 13% in each of the last five...
An investment has returned 13%, 6%, -7%, 4%, and 13% in each of
the last five years. If we decide to use historical returns as a
proxy for expected future returns, what is the expected rate of
return?
What is the YTM of a 10 year, 6% annual coupon bond with a price
of $980?
In the past, the mean running time for a certain type of flashlight battery has been...
In the past, the mean running time for a certain type of
flashlight battery has been 9.2 hours. The manufacturer has
introduced a change in the production method and wants to perform a
hypothesis test to determine whether the mean running time has
increased as a result.
The hypotheses are: H O : µ = 9.2 hours Ha : µ > 9.2 hours
where µ is the mean running time of the new batteries Suppose that
the results of the...
A new design for the braking system on a certain type of car has been proposed....
A new design for the braking system on a certain type of car has
been proposed. For the current system, the true average braking
distance at 40 mph under specified conditions is known to be 120
ft. It is proposed that the new design be implemented only if
sample data strongly indicates a reduction in true average braking
distance for the new design.
(a) Define the parameter of interest.
μ = true average braking distance for the new design
μ...
A new design for the braking system on a certain type of car has been proposed....
A new design for the braking system on a certain type of car has
been proposed. For the current system, the true average braking
distance at 40 mph under specified conditions is known to be 120
ft. It is proposed that the new design be implemented only if
sample data strongly indicates a reduction in true average braking
distance for the new design.
a. Define the parameter of interest.
b. State the relevant hypotheses.
c. Suppose braking distance for the...
Suppose that two defective refrigerators have been included in a shipment of eight refrigerators. The buyer...
Suppose that two defective refrigerators have been included in a
shipment of eight refrigerators. The buyer begins to test the eight
refrigerators one at a time. Let the random variable Y represent
the number of defective refrigerators found after three
refrigerators have been tested. Compute the probability
distribution of Y.
I did a similar problem to this but worked out a sample space
etc. and solved for certain probabilities however what confused me
then and what confuses me now is...
1. Statistics at a certain college has been historically taught at two times: at 8 am...
1. Statistics at a certain college has been historically taught
at two times: at 8 am and at 4 pm.
A random sample of 150 students that took the morning class
results in a mean score of 81.2 points, with a standard deviation
of 18 points, and a random sample of 150 students that took the
afternoon class results in a mean score of 76.4 points and a
standard deviation of 21 points. For this problem, assume that the
sample...
Annual high temperatures in a certain location have been tracked for a sample of 13 years....
Annual high temperatures in a certain location have been tracked
for a sample of 13 years. Let X represent the year and Y the high
temperature (in C∘).
Years
Temperature in C∘C∘
2
9.5
3
9.35
4
11.2
5
11.35
6
10.6
7
12.95
8
13.7
9
13.45
10
12.2
11
12.65
12
15.9
13
15.55
14
14.3
1) Calculate the correlation coefficient. (Round to three
decimal places.)
r=
Let's test the significance of the correlation
coefficient at α=0.05 significance...
Historically the S&P 500Index has returned about 8% a year but returns are very uneven as...
Historically the S&P 500Index has returned about 8% a year
but returns are very uneven as recent experience has reminded us -
the INDEX declined by more than 50% from its peak in2007 and took 7
years to attain that peak level again. Last year the S & P 500
Index gained over 30% but this year it declined by over 30% in
March alone. In contrast a typical Money Market Fund has returned
about 2% a year with minimal...
Suppose a certain retailer sells several models of refrigerators. A random sample of the models sold...
Suppose a certain retailer sells several models of
refrigerators. A random sample of the models sold by this retailer
and their corresponding cubic feet (cu. ft.) and list price can be
found below.
Model
Cu. Ft.
List Price
Model 1
18.3
$899.99
Model 2
24.8
$1,699.99
Model 3
with Thru-the-Door Ice and Water
25.4
$1,699.99
Model 4
19.3
$749.99
Model 5
17.7
$599.99
Model 6
with Thru-the-Door Ice and Water
19.6
$1,619.99
Model 7
25.0
$999.99
Model 8
24.5
$1,299.99...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 1. Consider the following nuclides: &
- In general, teams can be described three ways. Name and define each.
- JAVASCRIPT: Please create an array of student names and another array of student grades. - Create...
- Topic - Construction: Structural, loads, tension 1.) Explain why pure tension members are the most efficient...
- Procter and Gamble (PG) paid an annual dividend of $ 1.62$1.62 in 2009. You expect PG...
- locate a recent case of online child pornography. Write a summary of the incident and describe...
- #Python 5. Write function called evaluate() that evaluates the following Python expressions or assignments as specified:...
ADVERTISEMENT