on 1
5 / 5 points
Llantas Inc. developed a new tire that is expected to earn $1,000 in profit if customer demand is low, $2,000
if customer demand is moderate, and $5,000 if demand is high. The probabilities of low, moderate, and high
demand is 0.2, 0.5,
on 1
uiz Submissions - Test3
Attempt 1
Written: Feb 28, 2014 8:20 PM - Feb 28, 2014 10:29 PM
Submission View
Your quiz has been submitted successfully.
0 / 5 points
A camera manufacturer just shipped a batch of 36 digital cameras to local retailers and se
5.2 Consider the following discrete probability distribution:
Random Variable Probability
1
2
3
4
0.18
0.25
0.35
0.22
a) Calculate the mean of this distribution.
b) Calculate the standard deviation of this distribution.
5.4 The following table provides fi
on 1
The main drawback to using secondary data is that
5 / 5 points
it may be expensive to obtain the data.
the subjects of interest need to be directly observed to collect
the data.
the subjects of interest are paid to provide the data.
you have no contr
Your quiz has been submitted successfully.
1
5 / 5 points
As the size of the sample increases,
the standard error of the mean becomes smaller.
the population standard deviation increases.
the sampling error increases.
the shape of the sampling distributio
6.2 For a standard normal distribution, determine the following:
a)
b)
c)
d)
P(z > 1.35)
P(z > -0.42)
P(-1.70 z -0.65)
P(-1.69 z 0.20)
6.3 A random variable follows the normal probability distribution with a mean of 80 and a standard
deviation of 20. Wha
9.2 Calculate the p-value for the following conditions and determine whether or not to reject
the null hypothesis:
a) one-tail test, Zx = 1.46, and a = 0.10
b) one-tail test, Zx = -2.48, and a = 0.01
c) two-tail test, Zx = -1.92, and a = 0.01
d) two-tail
on 1
5 / 5 points
If the order of objects is not of importance, how many ways can I select 7 objects 3 at a time?
1) 21
2) 35
3) 49
4) 210
Questi
on 2
5/5
points
The probability that I draw three of a kind in a five-card card is an example of:
1) Classica
7.2 Jeff Bollinger of Prudential Realtors has 20 residential listings under contract. The following table
shows the number of days each of these 20 houses has been on the market as of today.
20 21 2 17 35 21 40 54 52 24
40 53 46 10 42 11 37 62 21 76
a) Ca
A survey of adults who typically work full-time from home recorded their current education levels. The results are shown in the table
below.
Education Level
Bachelor's degree or higher
Some college
High school diploma only
Less than high school
diploma
Fr