Ticket 88 Statistics

1. According to a sample survey of 10,000 commuters (15% of the sample), average trip distance - 32.4 km, the standard deviation of the distance traveled - 1.5 km. To determine the limits of the medium-range trip with probability 0,954 (t = 2).

2. The following data on unemployment in the Russian Federation.
Year The proportion of the unemployed with job search duration (%)
Up to 6 months. 6 months. - 1 year 1 year or more
2006 44.0 17.0 39.0
Determine the median job search time unemployed in 2006 formulated conclusions.

3. The income of the company in the reporting year amounted to 250 thousand rubles. In three years, the company planned to increase revenue to 370 thousand rubles. How many thousand. Rubles at an average annual income of the enterprise should be increased to achieve the planned level?
a) 40 th. rub .;
b) 120 thousand. rub .;
c) 60 th. rub .;
d) 48 th. p.