| 4501 |
For a normal distribution, approximately what percentage of values lie within two standard deviations of the … |
Mathematics/Applied Mathematics
Normal distribution |
Medium |
| 4502 |
Given P(0 < Z < 1) = 0.3413 for the standard normal variate Z, the value of P(Z > 1) is: |
Mathematics/Applied Mathematics
Normal distribution |
Medium |
| 4503 |
Marks of 1000 students are normally distributed with mean 60 and standard deviation 10. Given P(0 < Z < 2) = … |
Mathematics/Applied Mathematics
Normal distribution |
Hard |
| 4504 |
Data on a company's annual profit, recorded year by year from 2001 to 2020, is an example of: |
Mathematics/Applied Mathematics
Time series and its components |
Easy |
| 4505 |
Sales of umbrellas in a town rise sharply every monsoon and fall afterwards. This movement is: |
Mathematics/Applied Mathematics
Time series and its components |
Easy |
| 4506 |
An economy passes through prosperity, recession, depression and recovery over a period of several years. This… |
Mathematics/Applied Mathematics
Time series and its components |
Medium |
| 4507 |
A factory's output drops sharply for two months because of an unexpected flood. This change is best classifie… |
Mathematics/Applied Mathematics
Time series and its components |
Medium |
| 4508 |
Under the multiplicative model of a time series, T = 500 units, S = 1.2, C = 0.9 and I = 1. The observed valu… |
Mathematics/Applied Mathematics
Time series and its components |
Hard |
| 4509 |
The annual rainfall of one city recorded for 30 consecutive years is an example of: |
Mathematics/Applied Mathematics
Time series analysis |
Easy |
| 4510 |
In a time-series graph (historigram), time is usually plotted on: |
Mathematics/Applied Mathematics
Time series analysis |
Easy |
| 4511 |
In an additive time-series model, the observed value is 250 and the trend value is 230. The combined value of… |
Mathematics/Applied Mathematics
Time series analysis |
Medium |
| 4512 |
Under the multiplicative model, a month's sales are 660 units and its seasonal index is 120. The deseasonalis… |
Mathematics/Applied Mathematics
Time series analysis |
Medium |
| 4513 |
In a multiplicative model, the seasonal indices for the first three quarters of a year are 110, 95 and 85. Th… |
Mathematics/Applied Mathematics
Time series analysis |
Hard |
| 4514 |
Which method of measuring secular trend is the most subjective, giving different results with different peopl… |
Mathematics/Applied Mathematics
Secular trend and its measurement |
Easy |
| 4515 |
For the series 10, 14, 18, 16, 20, the 3-year moving averages are: |
Mathematics/Applied Mathematics
Secular trend and its measurement |
Medium |
| 4516 |
Six years' sales are 20, 22, 24, 30, 32, 34. By the method of semi-averages, the two averages plotted are: |
Mathematics/Applied Mathematics
Secular trend and its measurement |
Medium |
| 4517 |
A moving average with an even period, such as a 4-year moving average, must be: |
Mathematics/Applied Mathematics
Secular trend and its measurement |
Easy |
| 4518 |
Using coded years X = −2, −1, 0, 1, 2 and values Y = 10, 12, 15, 17, 21, the least-squares trend line Y = a +… |
Mathematics/Applied Mathematics
Secular trend and its measurement |
Hard |
| 4519 |
In statistics, the entire group of individuals or items about which information is required is called the: |
Mathematics/Applied Mathematics
Population and sample |
Easy |
| 4520 |
A sampling method in which every member of the population has an equal chance of being selected is: |
Mathematics/Applied Mathematics
Population and sample |
Easy |