Question

Suppose that the duration of trouble-free operation of a new vacuum cleaner is normally distributed with mean 500 days and a standard deviation of 81 days. The research department randomly selects 36 customers who bought these vacuum cleaners and records duration (in days) of trouble-free operation.

The standard error of the sample mean is__days.

The probability that the average duration of trouble-free operation time is between 480 days and 530 days is _____ (4 decimals place)

Answer #1

Suppose that the duration of trouble-free operation of a new
vacuum cleaner is normally distributed with a mean of 550 days and
a standard deviation of 100 days. The research department randomly
selects 25 customers who bought these vacuum cleaners and records
the duration (in days) of trouble-free operation. Which of the
following is NOT TRUE for the
sample average of number of trouble-free operation days
()?
P (x̄ < 500) = P(Z < -2.5)
P (x̄ > 600) =...

The life expectancy of vacuum cleaner is normally distributed
with a mean of 48 months and a standard deviation of 12 months. 90%
of the vacuum cleaners will have a life expectancy of at least how
many months?
(a)28.3 (b)32.6 (c)46.4 (d)67.7 (e)49.6

Scenario
Pigs R Us is a second generation, family-owned
Richmond-based company with about 400 employees. It slaughters,
manufactures, and sells pork food products. Pigs R Us
(PRU) is a low-tech, hands-on, “bricks and mortar” type of company
with solid brand recognition, an impeccable reputation for high
quality and ethical standards. The processes used in manufacturing
are with the highest ISO20002 standards, and the plant is
maintained immaculately. The personnel are comprised of an older
work force (average employee age is late...

Scenario
Pigs R Us is a second generation, family-owned
Richmond-based company with about 400 employees. It slaughters,
manufactures, and sells pork food products. Pigs R Us
(PRU) is a low-tech, hands-on, “bricks and mortar” type of company
with solid brand recognition, an impeccable reputation for high
quality and ethical standards. The processes used in manufacturing
are with the highest ISO20002 standards, and the plant is
maintained immaculately. The personnel are comprised of an older
work force (average employee age is late...

Delta airlines case study
Global strategy. Describe the current global
strategy and provide evidence about how the firms resources
incompetencies support the given pressures regarding costs and
local responsiveness. Describe entry modes have they usually used,
and whether they are appropriate for the given strategy. Any key
issues in their global strategy?
casestudy:
Atlanta, June 17, 2014. Sea of Delta employees and their
families swarmed between food trucks, amusement park booths, and
entertainment venues that were scattered throughout what would...

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