Business Statistics and Forecast. Test (134 Issues.)

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The list of questions:
Absolute statistical indicators can be expressed in the following units:
Analysis of tightness and direction of relations between the two signs is based on:
In 2002, revenues from sales of goods (works, services) of the company has increased compared to last year by 20%, the absolute value of the 1% gain - 15 ths. Rub. Determine the revenue from sales of products (works, services) of the company in 2002 .:
To what extent changes empirical correlation ratio?
In some cases, a weighted arithmetic mean?
In which case it will be obtained more "smooth" series, less prone to random fluctuations, if the time series of annual data oburozhaynosti wheat smooth with:
The regression equation y = 25 - 5x, the regression coefficient means:
Variational next distribution is:
Variation - is:
The amount equal to the integral group defined by the formula:
The secondary group is called:
Choose the right formula for weighted variance:
Choose the right formula for weighted arithmetic mean:
Calculate the average number of torque dynamics, if we know the trade balances shop on the first day of each month (mln. Rub.) On January 1 - 20, February 1 - 18, March 1 - 16, April 1 - 15.
Identify the relationship between the signs, you can use categories:
The grouping of enterprises by industry is:
Given a time series of fabric production in the Russian Federation:
Dispersion - is:
For the time series of the average number of people employed in the industry to estimate the coefficients of the linear trend. In this model, the forecast is calculated on the number of employees in 1998 (the period of pre-emption - 1 year) and 1999 (the period of pre-emption - 2 years). It can be argued that:
For the discrete variational series fashion - is:
To describe the economic processes that have a limit of growth processes "to saturation" can use the following growth curves:
To predict development trends predolzheny 4 alternative models for which the calculated value of the criterion - sredneykvadratichnoy error. Choose the best model in terms of this criterion.
If all the characteristic increase in k times the variance:
If all the characteristic values \u200b\u200bincrease by a certain amount, the dispersion:
If all the individual characteristic values \u200b\u200bto reduce by 20% the average value;
If the values \u200b\u200bof indicator characterizing the size of the phenomenon under study fall on certain dates, number of speakers are:
If the index of variable composition is 118%, while the index of structural changes = 107%, the index of fixed structure is:
If the correlation coefficient = 0.7, the regression coefficient is:
If the correlation coefficient = - 0.5, the relationship is:
If the correlation coefficient = 1, the link is:
If the regression coefficient is positive, then the coefficient of correlation
If the sign is measured in rubles, determine which units will be measured by the standard deviation
If you compare the dynamics of a number of neighboring levels, indicators are:
If the average calculated by the secondary (grouped) data is used:
If prices are increased by 14% and the number of products sold decreased by 6%, the index of turnover will be equal to:
During the year the turnover of the company increased by 15.3%, with projected growth of 1.2 times. Determine the percentage of the plan.
The problem of correlation analysis:
There are data on the population at the beginning of the year. What kind of formula you use to determine the average population?
Change rates of oranges in March compared with the price in February, will be determined by:
Will the value of the average value of the proportional change of all weights:
Will the average value, if all the weight reduced by 20%?
The available data on the distribution of the mean free path of the van trade and intermediary firms in one trip.

Additional information

Interval variation number distribution is represented on the chart by using
Using these data, find the median value:
Using these data, find the modal value:
How is the mean value, if all options feature reduced in 1.5 times, and all the weight is 1.5 times increase?
What models can take into account the different levels of the information value of the time series?
Which indicators describe a single object or a single unit together:
What characterizes the variation of the indicators of the absolute size of the oscillatory characteristic about the average value?
What characterizes the variation of the indicators of the relative size of the oscillatory characteristic about the average value?
The product quality of the enterprise is characterized by the following data (per month). Determine the average scrap rate for the whole company:
The coefficient of determination is calculated as:
Rank correlation coefficient is used to assess the closeness of the connection between: 1) quantitative characteristics; 2) the features whose values \u200b\u200bcan be arranged; 3) attributive features.
The regression coefficient indicates:
The coefficient of elasticity shows:
Multiple correlation coefficient ranges:
Can a relative measure of the intensity ratio be expressed:
Is it possible to study the relationship of socio-economic phenomena according to the time series:
On the basis of the time series of monthly dynamics of the production of paper in the Russian Federation (January 1993 to July 1998) calculated production forecast from September 1998. This is the forecast:
On the basis of annual data on changes in the yield of potatoes in the region from 1988 to 1997 (t = 1,2, ... 10) were estimated coefficients of the linear trend:. From this model it follows that the average annual increase in yields is as follows:
On the basis of annual data on changes in the yield of potatoes in the region from 1988 to 1997 (t = 1,2, ... 10) were estimated coefficients of the linear trend:. Calculate the forecast yield of potatoes in the region in 1998 is forecast:
Call torque figure:
What are the main types of power averages:
What are the structural average:
The lowest value in the range feature called:
The accumulated frequencies are used in the construction of:
Tax Inspectorate of one of areas of the city tested 86 commercial stalls, 37 found financial irregularities. Determine the variance of the share of commercial stalls, with financial irregularities.
Generalized quantitative characteristic trait together at a given place and time can be retrieved using the index:
The total number of units in the population - are:
Determine the value of the regression coefficient if:
The variance, if you know that the average is 40, and the mean square of the characteristic values \u200b\u200bin 2500.
Determine the coefficient of variation, if it is known that the average is 100, 64 and the variance.
Determine the modal test assessment:
Determine the formula Sturgess number of groups in grouping, if the number of units in the population is 150:
Determine the average length of service:
Determine the average payback for the development of innovative work on the following data:
Determine the average profitability of companies on the following data:
Determine the median and mode:
Determine the average value, it is known that the coefficient of variation is 30%, and the variance of feature - 800.
Basis groups can be:
Remains of unsold finished goods in stock of the company at the beginning of each quarter - a number of speakers:
Note the units relative performance variations
Note the relative performance indicators:
Note performance variations that are absolute;
Select the correct definition of multicollinearity:
Select the correct definition of partial correlation:
The relative rate of production of the plan now was 103%, while the volume of

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