Question
In: Math
It is known that 5% of all laptops from a certain manufacturer have a certain defect.A...
It is known that 5% of all laptops from a certain manufacturer have a certain defect.A random sample of 20 laptops from this manufacturer is selected.a)What is the probability that no laptops in the sample have defect?.b)What is the probabilty that exactly two laptops in the sample have defect?.c)What is the probabilty that atmost 2 laptops in the sample have the defect?.Let X denote the number of defective laptops in a sample .what is the expected value of X , E[X]?.and Laptops from this manufacturer are sold in batches of 12 and a batch is deemed to be unsatisfactory if it contains 2 or more laptops with defect.If 5 batches are selected at random ,what is the probability that at least 2 of them are deemed unsatisfactory?
Solutions
milcah answered 6 months agoRelated Solutions
QUESTION 1 [10] It is known that 80 % of all students have their own laptops,...
QUESTION 1 [10] It is known that 80 % of all students have their
own laptops, thus in a random sample of eight students, find the
following probabilities: 1.1) That exactly seven students will have
their own laptops. (3) 1.2) That at least six students will have
their own laptops. (4) 1.3) That at most five students will have
their own laptops (4) QUESTION 2 [11] The number of accidents that
occur on an assembly line have a Poisson distribution...
QUESTION 5: A certain type of aircraft battery is known to have a lifetime, which is...
QUESTION 5: A certain type of aircraft battery is
known to have a lifetime, which is normally distributed.
Suppose that an operator selects 16 batteries from that
population. The average lifetime of batteries is found as 1200 days
in the sample. Assuming population standard deviation is known to
be 200 days, find the 98% confidence interval for the population
average. (Calculate the margin of error, lower and upper limits for
the 98% confidence interval)*ANSWER USING EXCEL FUNCTIONS
*
...
Question) It is known that, on average, 2 people in 5 in a certain country are...
Question) It is known that, on average, 2 people in 5 in a
certain country are overweight. A random sample of 400 people is
chosen. Using a suitable approximation, find the probability that
fewer than 165 people in the sample are overweight.
It is based on using normal distribution as an approximation for
the binomial distribution. Please explain in detail with all
logical steps for better understanding so as to how to solve these
types of questions.
A large retai lchain purchases a certain kind of electronic device from a manufacturer. The manufacturer...
A large retai lchain purchases a certain kind of electronic
device from a manufacturer. The manufacturer indicates that the
defective rate of the device is 3%. The inspector at the retailer
randomly picks 100 items from a shipment.
(a) What is the expected value of the number of defective
electronic devices?
(b) What is the variance of the number of defective electronic
devices?
(c) What is the standard deviation of the number of defective
electronic devices?
A diagnostic test for a certain disease is applied to n individuals known to not have...
A diagnostic test for a certain disease is applied to n individuals known to not have the disease. Let X = the number among the n test results that are positive indicating presence of the disease, so X is the number of false positives) and p = the probability that a disease-free individual's test result is positive (i.e., p is the true proportion of test results from disease-free individuals that are positive). Assume that only X is available rather than...
Rockwell hardness of pins of a certain type is known to have a mean value of...
Rockwell hardness of pins of a certain type is known to have a
mean value of 50 and a standard deviation of 1.5. (Round your
answers to four decimal places.)
(a) If the distribution is normal, what is the probability that
the sample mean hardness for a random sample of 16 pins is at least
51?
(b) What is the (approximate) probability that the sample mean
hardness for a random sample of 45 pins is at least 51?
The lifetime of a certain brand of electric light bulb is known to have a standard...
The lifetime of a certain brand of electric light bulb is known
to have a standard deviation of 46 hours. Suppose that a random
sample of 80 bulbs of this brand has a mean lifetime of 480 hours.
Find a 90% confidence interval for the true mean lifetime of all
light bulbs of this brand. Then complete the table below.
Carry your intermediate computations to at least three decimal
places. Round your answers to one decimal place. (If necessary,
consult...
The lifetime of a certain brand of electric light bulb is known to have a standard...
The lifetime of a certain brand of electric light bulb is known
to have a standard deviation of
51 hours. Suppose that a random sample of 70 bulbs of this brand
has a mean lifetime of 493 hours. Find a 95% confidence interval
for the true mean lifetime of all light bulbs of this brand. Then
complete the table below.
Carry your intermediate computations to at least three decimal
places. Round your answers to one decimal place. (If necessary,
consult...
A certain species of snake is known to have a mean length of 18.2 inches with...
A certain species of snake is known to have a mean length of
18.2 inches with a standard deviation of 4.7 inches. Consider
repeatedly choosing samples of 50 snakes of this species and
finding the mean length of each sample.
a)What is the mean of this sampling distribution of x?
b)What is the standard deviation of this sampling distribution
of x?
c)What is the shape of this sampling distribution? Explain how
you know this.
d)Find the probability that the mean...
Scores on a certain IQ test are known to have a mean of 100. A random...
Scores on a certain IQ test are known to have a mean of 100. A
random sample of 60 students attend a series of coaching classes
before taking the test. Let m be the population mean IQ score that
would occur if every student took the coaching classes. The classes
are successful if m > 100. A test is made of the hypotheses H0:
m = 100 vs H1: m > 100.
Consider three possible conclusions:
The classes are successful....
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Boarder line and antisocial disorder are perhaps the most research personality disorder.What are the most common...
- Read at least 2 academically reviewed articles and Write an annotated bibliography paper on Master Budgeting
- Why normalization and referential integrity are important principles when designing relational databases?
- Respond to the following in a minimum of 175 words: Discuss what elements should be present...
- 1) The 3rd bright fringe of a double slit interference pattern is 30.0 cm above the...
- A solar cell generates a potential difference of 0.320 V when a 445.0 ? resistor is...
- A ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the...
ADVERTISEMENT