- Arts & Culture 5939
- Business & Economics 689
- Computers 310
- Dictionaries & Encyclopedias 81
- Education & Science 71767
- Abstracts 252
- Astrology 4
- Astronomy 1
- Biology 8
- Chemistry 2021
- Coursework 15546
- Culture 9
- Diplomas 411
- Drawings 574
- Ecology 6
- Economy 83
- English 75
- Ethics, Aesthetics 3
- For Education Students 14480
- Foreign Languages 11
- Geography 3
- Geology 1
- History 89
- Maps & Atlases 5
- Mathematics 13856
- Musical Literature 2
- Pedagogics 19
- Philosophy 23
- Physics 14190
- Political Science 5
- Practical Work 101
- Psychology 60
- Religion 4
- Russian and culture of speech 8
- School Textbooks 7
- Sexology 42
- Sociology 9
- Summaries, Cribs 87
- Test Answers 150
- Tests 9129
- Textbooks for Colleges and Universities 32
- Theses 24
- To Help Graduate Students 14
- To Help the Entrant 36
- Vetting 364
- Works 13
- Информатика 10
- Engineering 3058
- Fiction 696
- House, Family & Entertainment 107
- Law 132
- Website Promotion 71
-
Refunds: 0
Uploaded: 14.06.2013
Content: 30614184322773.zip 125,27 kB
Product description
Examination №4
№1. Under the scheme self-repetitions random sampling conducted a survey 10% of construction companies in the region in terms of the work performed. The results are shown in the table.
The scope of work, mln. Rub. Less than 56 56-60 60-64 64-68 68-72 Over 72 Total
Organisations September 11 19 30 18 13 100
Search:
a) border, which concluded with a probability of 0.9973 average volume of work performed all construction companies in the region;
b) the probability that the proportion of all construction companies, the scope of work of not less than 60 mln. rub., differs from the proportion of organizations in the sample is not more than 0.05 (in absolute value);
c) the amount of repetitions the sample in which the same boundaries for the average amount of work performed (see. p. a) can be guaranteed with a probability of 0.9876.
№2. According to the task 1 using the criterion 2-Pearson, with a significance level of α = 0,05 to test the hypothesis that the random variable X - the volume of work performed - normal distribution. Build on one drawing a histogram of the empirical distribution and the corresponding normal curve.
№3. Distribution of 100 medium-sized farms in the number of hired workers X (pers.) And their average monthly wage per person Y (thousand. Rub.) Presented in the table below:
Y
X 10-20 20-30 30-40 40-50 50-60 60+ Total
102 October 10
103 15 June 21
104 10 11 8 29
105 8 March 11
106 5 June 11
107 9 May 18 April
Total 5 14 28 14 14 25 100
You need:
1) calculate the average group and build and empirical regression line;
2) assuming that between the variables X and Y there is a linear correlation:
a) Find the equation of the regression lines and build their schedules on a drawing with empirical regression lines;
b) calculate the correlation coefficient, at a significance level α = 0,05 to assess its value and draw a conclusion about the direction of distress and relationships between variables X, and Y;
c) using the appropriate regression equation to estimate the average monthly wage per worker of the farm, which employs 10 salaried workers.
References
Feedback
0Period | |||
1 month | 3 months | 12 months | |
0 | 0 | 0 | |
0 | 0 | 0 |