The number of trailers per week, x, built by a small factory plant during the last 80 weeks is given in the table below.
|
x |
# Weeks |
|
15 |
9 |
|
16 |
15 |
|
17 |
18 |
|
18 |
16 |
|
19 |
14 |
|
20 |
8 |
What is the mean (expected) number of trailers built in a week?
The number of trailers per week, x, built by a small factory plant during the last...
1. Compute Three- week and five-week moving averages for the time series. 2. Compute the MSE for Three- week and five-week moving average forecasts. 3. What appears to be the best number of weeks of past data (three or five) to use in the moving average computation? Week Sale (1000s of Gallons) three-week five-week 17 21 19 23 18 16 20 18 10 20 15 12 31 34 31 14 15 16 17 18 19 20 28 32 29 34...
1. Let X be the number of homes sold per week by a group of realtors. The table lists the probability distribution of X. Find the mean and standard deviation of X. X 0 1 2 3 4 5 P(X) .17 24 19 18 .14 .08
1. Compute Three- week and five-week moving averages for the time series. 2. Compute the MSE for Three- week and five-week moving average forecasts. 3. What appears to be the best number of weeks of past data (three or five) to use in the moving average computation? Week Sale (1000s of Gallons) three-week five-week 17 21 19 23 18 16 20 18 10 20 15 12 31 34 31 14 15 16 17 18 19 20 28 32 29 34...
2.) A survey ELAC Student and the time they spend studying per week is given in the table below If a student studies 14 hours per week, would that student be considered unusual? Hours per Week Frequency 0-3 100 4-7 87 8-11 50 12-15 35 16-19 20 20-23 18
2.) A survey ELAC Student and the time they spend studying per week is given in the table below If a student studies 14 hours per week, would that student be...
The following table gives the frequency distribution of the number of hours spent last week on cell phones (making phone calls and texting) by all 100 students of the tenth grade at a school. Hours per Week Number of Students 0 to less than 4 13 4 to less than 8 16 8 to less than 12 21 12 to less than 16 16 16 to less than 20 17 20 to less than 24 17 Find the mean, variance,...
Question pertains to the
x-chart part
Sample Mean Range 16 8 12 13 6 6 4 15 10 10 11 10 16 13 14 0 14 17 11 12 IU 12 12 11 13 14 12 7 8 13 9 11 14 7 13 15 10 15 Subsequently, samples of size 5 were taken from the process every week for the next 10 weeks. The times were measured and the following results oblained: Sample Mean Range 16 9 17 12...
The number of accidents per week at a busy intersection was recorded for a year. There were 19 weeks with no accidents, 17 weeks with one accident, 9 weeks with two accidents, and 7 weeks with three accidents. A week is to be selected at random and the number of accidents noted. Let X be the outcome. Then X is a random variable taking on the values 0, 1, 2, and 3. (a) Write out a probability table for X...
An electrical contractor’s records during the last five weeks indicate the number of job requests: Week: 1 2 3 4 5 Requests: 20 22 18 21 22 Predict the number of requests for week 6 using each of these methods: a. Naive. b. A four-period moving average. c. Exponential smoothing with .30. Use 20 for week 2 forecast.
a survey asked 50 baseball fans to report the number of games they attented last year. The results of the survey are presented below. Construct a histogram using the data. What can you tell about how the data is distributed given your histogram? 5 16 11 8 8 8 5 11 14 10 15 26 15 19 7 6 24 20 9 18 14 6 6 16 10 6 5 24 25 22 7 15 4 9 5 21 28...
5) The table below shows the number of hours spent per week viewing TV (y), and the number of years of education (x) for 10 randomly selected individuals. 10 15 8 y (hours) x(years) 4 20 16 4 15 12 14 11 16 16 18 12 20 10 12 (15 Points) Find the simple linear regression model a) (10 Points) Find 95% confidence interval for B b) (5 Points) c) Calculate R2