Suppose that the process time of a process is 11 minutes/unit. It
is observed that the...
Suppose that the process time of a process is 11 minutes/unit. It
is observed that the output rate is 2 units/hour. What is the input
rate in units/minute? Round your answer to 2 decimal places (if it
has more digits than 2 digits after the decimal point).
Suppose the average time to complete a marathon is believed to
be 264 minutes. If a random sample of 67 marathon runners posted an
average time of 248 minutes, with a standard deviation of 46.6
minutes, is there evidence to support the claim that the average
time is lower than originally thought? Perform a hypothesis test
with significance level 0.01.
A. State the null hypothesis in symbols and in a complete
sentence.
B. State the alternative hypothesis in symbols and...
Time Remaining 2 hours 2 minutes 11 seconds
02:02:11
Item 6
Item 6
Time Remaining 2 hours 2 minutes 11 seconds
02:02:11
The Molson Company had budgeted production for the year as
follows:
Quarter
1
2
3
4
Production in units
11,700
13,700
19,600
15,700
Four pounds of raw materials are required for each unit
produced. Raw materials on hand at the start of the year total
5,700 lbs. The raw materials inventory at the end of each quarter
should...
The mean time to assemble a piece of furniture is 52
minutes. Suppose the the assembly times are normally distributed
with a standard deviation of 4.3 minutes. What percentage of
assembly times fall between 47.7 minutes and 56.3
minutes?
Use the Empirical Rule
Question 1 options:
95%
68%
16%
99.7%
question 2
A survey found that the mean retail price per litre of premium
grade gasoline is $1.89. Suppose the retail prices per litre are
normally distributed with a standard...
Suppose the mean wait time for a bus is 30 minutes and the
standard deviation is 10 minutes. Take a sample of size n =
100.
Find the probability that the sample mean wait time is more than
31 minutes.
Suppose the mean wait time for a bus is 30 minutes and the
standard deviation is 10 minutes. Take a sample of size n =
100.
Find the 95th percentile for the sample mean wait time.
Suppose the mean wait time for a bus is 30 minutes and the
standard deviation is 10 minutes. Take a sample of size n =
100.
Find the probability that the sample mean wait time is between
29 minutes and 31 minutes.
Suppose that an airline quotes a flight time of 135 minutes
between two cities. Furthermore, suppose that historical flight
records indicate that the actual flight time between the two
cities, x, is uniformly distributed between 115 and 155
minutes. Letting the time unit be one minute,
(a) Write the formula for the probability curve
of x.
(c) Find P(139 < x <
141). (Round your answer to 4 decimal places.)
(d) Find the probability that a randomly
selected flight between...
An IE performed a time study on a hydraulic valve installation
& test process. Each observed installation was performed by a
different production worker, so the activity factor (performance
rating) varied in each observation. A factor > 1.00 meant the
worker was performing better than normal in their observed time
(OT) (i.e, faster), while a factor < 1.00 meant the worker was
performing less normal in their observed time (OT) (ie, slower).
The allowance for personal delay and fatigue as...
Suppose a geyser has a mean time between eruptions of 76 minutes
. If the interval of time between the eruptions is normally
distributed with standard deviation 27 minutes , answer the
following questions.
(b) What is the probability that a random sample of 13 time
intervals between eruptions has a mean longer than 87 minutes?
(c) What is the probability that a random sample of 100 time
intervals between eruptions has a mean longer than 120
minutes?
(d) What...
Suppose the average time for an assembly worker to complete his task is 5.5 minutes.
a. What is the probability that he will be able to complete his task in less than 5 minutes?
b. What is the probability he will be able to complete his task in more than 6 minutes?