Question
In: Statistics and Probability
A teacher is currently teaching two statistics classes, one at 8:00 A.M. and the other at...
A teacher is currently teaching two statistics classes, one at 8:00 A.M. and the other at 10:00 A.M. The accompanying table summarizes the attendance records by showing the probability of the number of absent students per class. Complete parts a and b.
Probability
Number of Absent Students 8 A.M. Class 10 A.M. Class
|
0 |
0.06 | 0.11 |
| 1 | 0.15 | 0.46 |
| 2 | 0.34 | 0.21 |
| 3 | 0.15 | 0.11 |
| 4 | 0.22 | 0.06 |
| 5 | 0.08 | 0.05 |
a. Calculate the mean number of students absent for each class.
1. Calculate the mean number of students absent from the 8:00 A.M. class.
2. Calculate the mean number of students absent from the 10:00 A.M. class.
b) Calculate the standard deviation for the number of students absent for each class.
1. Calculate the standard deviation number of students absent from the 8:00 A.M. class.
2. Calculate the standard deviation number of students absent from the 10:00 A.M. class.
Solutions
orchestra answered 2 years agoRelated Solutions
5.19 At 8:00 A.M. there are 10 vehicles in a queue at a toll booth and...
5.19 At 8:00 A.M. there are 10 vehicles in a queue at a toll
booth and vehicles are arriving at a rate of Ȝ(t) = 6.9 − 0.2t.
Beginning at 8 A.M., vehicles are being serviced at a rate of ȝ(t)
= 2.1 + 0.3t (Ȝ(t) and ȝ(t) are in vehicles per minute and t is in
minutes after 8:00 A.M.). Assuming D/D/1 queuing, what is the
maximum queue length, and what would the total delay be from 8:00
A.M....
Bob sets two alarm clocks (battery-powered) to be sure he arises for his Monday 8:00 a.m....
Bob sets two alarm clocks (battery-powered) to be sure he arises
for his Monday 8:00 a.m. accounting exam. There is a 81 percent
chance that either clock will wake Bob.
(a) What is the probability that Bob will
oversleep?
(b) If Bob had three clocks, would he have at
least a 94 percent chance of waking up?
Yes
No
More students prefer to take 10 a..m. classes than 8 a.m. classes, meaning that the demand...
More students prefer to take 10 a..m. classes than 8 a.m.
classes, meaning that the demand for seats in 10 a.m. classes at
the university is higher than the demand for seats in 8 a.m.
classes. The supply of seats is fixed. If the university can only
charge one price, regardless the time, but wishes to maximize the
total number of seats purchased during the day, it should set the
price
a.
at equilibrium for 8 a.m. classes.
b.
at...
On a 9:00 a.m. Atlanta to Chicago flight for two weeks from today, 70 of the...
On a 9:00 a.m. Atlanta to Chicago flight for two weeks from
today, 70 of the 170 seats have been des- ignated for business
class fares ($559), but only 40 of these 70 seats have been sold.
The remaining 100 seats have been authorized for sale at the
economy fare of $259 and all 100 of these seats have been sold. A
new reservation request arrives for an economy fare seat. Explain
the opportunity cost of reallocating one seat from...
Q31. A customer comment phone line is staffed from 8:00 a.m. to 4:30 p.m. five days...
Q31. A customer comment phone line is staffed from 8:00 a.m. to
4:30 p.m. five days a week. Records are available that show the
number of calls received every day for the last five weeks. Excel
Data can be found in Data Tab/Sheet
a. Show a time series data plot of data and describe your
observation in terms of pattern, trend, etc.
b. Use a dummy variable method forecasting method to produce
Week 6’s Daily and total calls for Week...
Problem 16-18 The Budd Gear Co. specializes in heat-treating gears for automobile companies. At 8:00 a.m.,...
Problem 16-18
The Budd Gear Co. specializes in heat-treating gears for
automobile companies. At 8:00 a.m., when Budd’s shop opened today,
five orders (listed in order of arrival) were waiting to be
processed.
Order
Order
Size
(units)
Per Unit Time
in
Heat Treatment
(minutes/unit)
Due Date
(min. from now)
A
16
4
160
B
6
12
200
C
10
3
180
D
8
10
190
E
4
1
220
a....
Peer Teacher Mike only needs two more classes to graduate. So does Peer Teacher Shannon. Mike...
Peer Teacher Mike only needs two more classes to graduate. So
does Peer Teacher Shannon. Mike is enrolled in his Risk Capstone
and Interdimensional Yoga. Shannon is enrolled in her Actuarial
Capstone and Underwater Golf. Both students know that they will
earn either an A or a C in each class. 3 Mike has a 90% chance for
an A in Interdimensional Yoga (Mike is secretly a Yogi) and a 70%
chance for an A in his Risk Capstone. Shannon...
An oil exploration company currently has two active projects, one in Asia and the other in...
An oil exploration company currently has two active projects,
one in Asia and the other in Europe. Let A be the event that the
Asian project is successful and B be the event that the European
project is successful. Suppose that A and B are independent events
with P(A)=0.4 and P(B)=0.7.
a. If the Asian project is not successful, what is the
probability that the European project is also not successful?
Explain your reasoning.
b. What is the probability that...
An oil exploration company currently has two active projects, one in Asia and the other in...
An oil exploration company currently has two active projects,
one in Asia and the other in Europe. Let A be the event
that the Asian project is successful and B be the event
that the European project is successful. Suppose that A
and B are independent events with P(A) =
0.7 and P(B) = 0.4.
(a) If the Asian project is not successful, what is the
probability that the European project is also not successful?
Explain your reasoning.
Since the...
Three classes in elementary statistics are taught by three different persons : a regular faculty member, a graduate teaching assistant, and an adjunct from outside the university.
Three classes in elementary statistics are taught by three different persons : a regular faculty member, a graduate teaching assistant, and an adjunct from outside the university. At the end of the semester, each student is given a standardized test. Five students are randomly picked from each of these classes, and their scores are as shown in Table (a) Construct an ANOVA table and interpret your results.(b) Test at the 0.05 level whether there is a difference between the mean...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Will the Internet and related communication technologies be tools for increasing political freedom, or will they...
- Design a rectangular tied column for a DL = 1000 KN and a LL = 1350...
- Using the Stack class (it's on the class web page) construct a program that will evaluate...
- An old two-flat can be purchased for $200,000 cash. The two units can bring in a...
- Please code in C# - (C - Sharp) Assignment Description Write out a program that will...
- Geraldine Wolfe is a supervisor at Fantastigifts. She has an annual salary of $45,500, paid biweekly,...
- Employees present a serious threat to the security of an organization. Give four reasons why employees...
ADVERTISEMENT