Search & Filtering
In the daily production of a certain kind of rope, the number of defects per foot
Y is assumed to have a Poisson distribution with mean A = 2. The profit per foot
when the rope is sold is given by X, where X = 50 - 2Y - y2. Find the expected
profit per foot
Assume that the daily S&P return follows the normal distribution with mean μ = 0.00032 and standard deviation a= 0.00859.
a. Find the 75th percentile of this distribution.
b. Find the probability that the daily S & P return will be larger than 0 01
C. Consider the sample average S & P of a random sample of 20 days.
27:2 i. Describe the distribution of the sample mean with its expected value and standard error.
ii. What sample size is necessary to double the standard error of the mean?
iii. Is it more likely that the average S & P will be greater than 0 007, or that one day's S & P return will be?
iv. Find the number b such that P(x > b) = 0975
A new car is purchased for 24500 dollars. The value of the car depreciates at 14.75% per year. What will the value of the car be, to the nearest cent, after 14 years?
Determine whether each of the following functions from Z to Z is one to one and onto.
a.f(n)=n-1
b.f(n)=[n/2]
C.f(n)=n²+1
Find the domain and range of the function (x,x/|x|).
In a 2-week study of the productivity of workers, the following data were obtained on the total number of acceptable pieces which 100 workers produced:
65
36
49
88
79
56
28
43
67
36
43
78
37
40
68
72
55
62
22
82
88
50
60
56
57
46
39
57
73
65
59
48
76
74
70
51
40
75
56
45
35
62
52
63
32
80
64
53
74
34
76
60
48
55
51
54
45
44
35
51
21
35
61
45
33
61
77
60
85
68
45
53
34
67
42
69
52
68
52
47
63
65
55
61
73
50
53
59
41
54
41
74
82
58
26
35
47
50
38
70
Construct a grouped frequency distribution
Construct a histogram, frequency polygon, and ogives curves
in a graduate college,the average lenght of registration time during a semester is 120 minutes with a standard deviation of 25 minutes .with the introduction of a new registration procedure,a random sample of 50 students system took an average of 80 minutes sith a standard devation of 12 minutes
The average length of time for students to enroll in college is 6 hours and 10 minutes. Computerized enrolment is being tested. In a random sample of 180 students, it was found out that the average time for them to enroll is 2 hours and 45 minutes with a standard deviation of 20 minutes. At = 0.01, does this indicate that the average time for students to enroll using computerized enrolment is less than the regular enrolment?
A new drug on the market is claimed by its manufacturers to reduce overweight women by 4.55 kg per month with standard deviation of 0.91 kg. Ten women chosen at random have reported losing an average of 4.05 kg within a month. Does this data support the claim of the manufacturer at 0.05 level of significance?
A new drug on the market is claimed by its manufacturers to reduce overweight women by 4.55 kg per month with standard deviation of 0.91 kg. Ten women chosen at random have reported losing an average of 4.05 kg within a month. Does this data support the claim of the manufacturer at 0.05 level of significance?
