The Tele-Vision Corporation produces high end LCD flat screen
HD-TVs. They make 3 different models. Under their old cost system,
Tele-Vision allocated overhead costs based on direct labor dollars.
Recently, the firm adopted an ABC cost system. The move to ABC was
due to a price war in the market for 30” LCD in order to attract
buyers for the World Cup. The market price for a comparable 30” LCD
TV was $400. The 30” LCD unit of Tele-Vision could...
The cost of producing flat-screen TVs has fallen over the past
decade. If demand remains the same, what happens to equilibrium
price and quantity? What happens to consumer surplus? What happens
to producer surplus?
Question 3. Monthly demand at A&D Electronics for
flat-screen TVs are as follows:
Month Demand (units)
1 1,000
2 1,113
3 1,271
4 1,445
5 1,558
6 1,648
7 1,724
8 1,850
9 1,864
10 2,076
11 2,167
12 2,191
Estimate demand for the next two weeks using simple exponential
smoothing with a = 0.3 and Holt’s model with a = 0.05 and b = 0.1.
For the simple exponential smoothing model, use the level at Period
0 to be...
In a recent survey of homes in a major Midwestern city, 30% of
the homes have a fax machine and 75% have a personal computer.
Suppose 15% of the homes have both a fax machine and a personal
computer. What is the probability that a randomly selected home
does not have a fax machine or does not have a personal
computer?
In a recent survey of homes in a major Midwestern city,
10% of the homes have a fax machine and 55% have a personal
computer. Suppose 7% of the homes with a fax machine also have a
personal computer. What is the probability that a home has a fax
machine or a personal computer?
A recent study found that toddlers who have a diet high in
processed foods may have a slightly lower IQ later in life. The
conclusion came from a long-term investigation of 14,000 people
whose health was monitored at 3,4,7, and 8 years of age.
e) One analysis found that of the 4000 children for which there
were complete data, there was a significant difference in IQ
between those who had had “processed” (i.e., junk) food and those
who followed health-conscious...
A study of fox rabies in randomly selected 15 locations
in southern Germany found that the mean number of cases of rabies
in each location was 4.75 with a standard deviation of 2.82. In
northern Germany, a second sample of 10 locations found that the
mean number of cases was 3.93 with a standard deviation of 1.4.
Does this information indicate that there is a difference in the
mean number of cases of fox rabies between the two
regions?
1. A study of 99 dental hygienists were found to have an
exposure to mercury vapors at an average of 0.08 mg/m3
(σ=0.005) over a 10-hour work shift. The regulatory limit for
mercury vapors is 0.05 mg/m3 over a 10-hour work shift.
Preform a one-mean hypothesis test to see if the exposures of the
dental hygienists are above that allowable by the regulatory limit.
Make sure to follow all 4 steps.
2. Construct a 95% confidence interval for the
information...
1. Your study found that 72% of participants in your study were
happy. If you were to interview 20 people, what is the probability
that 14 are happy? [4 marks]
2. Your study found that annual income is normally distributed
with a mean of 1600 hours and standard deviation of 250 hours. What
is the probability that a participant will work at least 1400 hours
in a year? [4 marks]
A recent study asked 80 women and 75 men if they expected to be
promoted at their companies in the next 12 months. 16 women and 19
men said yes. At the .05 level, is there a significant difference
between women and men in their expectations of receiving a
promotion?
a. What is the pooled proportion?
b. what is the test statistic?
c. is gender difference significant?
d. Calculate the 95% confidence interval for the difference in
proportions