Stats Help for College-level Students

time series

How many time series are shown in the table? a. 1 b. 2 c. 3 d. 4 The 1999 observation corresponds to? a. t = 1 b. t = 2 c. t = 3 d. t = 4 What is the time period used by the data? a. day b. week c. month d. year What is the independent variable? a. crop yield b. rainfall c. year d. temperature what is ...continues

time series

Horace Mann, principal of Jones Public School, has decided to construct a time series model to obtain a 2- and a 3-period moving average to forecast student enrollments for next term. Which statement is true concerning the accuracy of each forecast that Horace will obtain? (which one) a. The 2-period forecast will be more ac ...continues

Mean square error

Media Company has collected 15 months of time series data for the sales of a new product since it was commercialized. Media has decided to apply a 5-month moving average model to the data. How many squared error terms must be summed in order to obtain the mean square error (MSE)? (which one) a. 15 b. 10 c. 9 d. 5

analysis

Time series analysis is used to study data that may exhibit which of the following? 1. trends 2. systematic behavior 3. patterns (which one?) a. 1 b. 2 c. 3 d. 1, 2, and 3

upward/downward trends

A set of time series data is showing no particular upward or downward trend. All of the following techniques would be appropriate to use EXCEPT: a. exponential smoothing b. regression c. simple moving average d. weighted moving average

forecast

Time series models are used to __________ past behavior in order to predict future behavior. a. extrapolate b. interpolate c. project d. simulate

Statistics

Find the probabilities

Statistics

Use the table above to determine P(X is greater than or equal to 2). Determine the expected value of X. PROBLEM 2 Two fair dice are tossed. You bet $5 that you will roll "an even sum". If you roll "an even sum" you win $10. Otherwise you lose the $5 bet. What is the expected return on this game? PROBLEM 3 ...continues

Regression/correlation

Please see attachment.

Mean, Mode, Median, variance and standard deviation question

see Word attachment please.