4. В 1 классе 20 мальчика, во \( 2-17 \), в \( 3-16 \), в \( 4-1 \) Постройте круговую диаграмму количества мальчиков в начальной школе по классам.

The mean weight of 150 students in a certain class is 60 Kg . The mean weight of boys in the class is 70 Kg and that of the girls is 55 Kg 。 Find the number of boys and the number of girls in the class.

If a scatter plot shows points that are closely clustered together, what can you infer about the correlation between the variables?

тета а, если: \( \sigma=3 ; n=36 ; \gamma=0,95 \) \( \sigma=3 ; n=36 ; \gamma=0,99 \) \( \sigma=3 ; n=36 ; \gamma=0,999 \)

Условие задания: стандартное отклонение равно 6, средний квадрат значений равен 98,7. Найди среднеє арифметическое. Рассмотри два варианта по значению средне арифметического с округлением до десятых. Наименьшее среднее арифметическое:

15. Suppose data collected for heights (in cms) of 390 cows were tabulated in a frequency distribution and the following results were obtained. fi: \( 6,25,48,72,116,60,38,22,3 \) CMI \( =112, \mathrm{CM} 2=117 \) where CMi ith class mark Determine: a) Class interval size (class width), Class limits, Class boundaries and class marks b) The less than cumulative frequency distribution c) The class intervals having the highest frequency d) Above which height do we find \( 50 \% \) of the cows? c) Below which height do we get \( 25 \% \) of the cows? Draw a) histogram b) a frequency polygon c) C. a less than ogive for the above data