1. A SRS of 30 commuters to the Los Angeles metropolitan area
are selected, and each is asked how far they commute to work each
day. In the sample, the mean distance is 64 miles and the standard
deviation is 12 miles. Is there evidence that the average commute
to work for this population is more than 60 miles?
a. Yes, since the p-value is less than 0.05.
b. No, since the p-value is less than 0.05.
c. No, since...
A 40-mile stretch of rural road with limited access is
used primarily by regional commuters and business travelers to move
between two major interstate highways. The legal speed limit on the
road is currently 55 miles per hour (mph) and the estimated average
speed is 61 mph. Traffic engineers predict that if the speed limit
were raised to 65 mph and enforcement levels were kept constant,
the average speed would rise to 70 mph.
Currently, an average of 5,880 vehicles...
Standard labour cost of producing 40 units of a product is
30-hour work by skilled workers at a standard rate of Rs. 60 per
hour and 90-hour work by unskilled workers at standard rate of Rs.
20 per hour. 40 units of the product were produced for which the
skilled workers were paid for 20 hours at Rs. 55 per hour and
unskilled workers were paid for 130 hours at Rs. 24 per hour. Due
to a machine break-down, both...
Of all bit sequences of length 8, an 8-bit sequence is
selected at random.
Assuming that the probability of a bit being 0 is equal to that
being 1, determine
the probability that the selected bit sequence starts with a 1 or
ends with the two
bits 00.
66% of all Americans are homeowners. If 40 Americans are
randomly selected, find the probability that
a. Exactly 27 of them are homeowners.
b. At most 25 of them are homeowners.
c. At least 24 of them are homeowners.
d. Between 24 and 29 (including 24 and 29) of them are
homeowners.
On average, commuters in Phoenix, Arizona, area require
m= 40.0 minutes to get to work. Assume that for
all commuters the times to get to work are normally
distributed with the standard deviation of s= 10
minutes. Joe is an average Phoenix resident and goes to
work every day.
What is the probability that on any given day it will take Joe
over 45 minutes to get to work?
What is the probability that it will take Joe
exactly 40.0 minutes to...
55% of all Americans are home owners. If 40 Americans are
randomly selected, find the probability that
a. Exactly 21 of them are are home owners.____
b. At most 21 of them are are home owners.____
c. At least 22 of them are home owners.____
d. Between 19 and 23 (including 19 and 23) of them are home
owners.____
3. In the US economy, nearly half of all workers employed by
private firms work at the 0.3% of firms that have 500 or more
employees.
a. What does this relationship mean for the power relationship
between large firms and the labor force?
b. What do you think these large firms having such a market
share of labor means for labor prices (wages)?
c. Can you propose a policy that would counteract this power
imbalance?
Randy wants to either ride share to work or drive his own car to work, but it is impossible for Randy to ride share and drive his own car in one trip. If the probability that Randy ride shares is 0.22, and the probability that Randy drives his own car is 0.42, what is the probability that Randy ride shares or drives his own car to work? Provide your answer below
A survey asked a group of commuters from Dubai, Shanghai, and Paris what their primary mode of transport to work is. The results are tabulated in the two-way table below: Using SPSS and the data above, test whether there is any association between primary mode of transport and city of residence: a) Calculate the chi-square test statistic (x2). Give your answer to 3 decimal places. x2 = b) At a = 0.05, the null hypothesis of the chi-square test for association is