Ispitivanje koje treba da utvrdi da li postoji zavisnost izmedu pola i uspeha na studijama odselan \( X \) je sprovedeno na 100 slučajno odabranih studenata. Dobrim uspehom je smatran prosek od najmanje 8.50 . Medu anketiranim studentima, prosečnu ocenu od bar 8.50 je ostvarilo 16 muskih i 15 zenskih studenata, a prosečnu ocenu manju od 8.50 je ostvarilo 39 muskih i 30 zenskih studenata. Test izvriti sa pragom značajnosti \( \alpha=0.05 \).

09) O Desvio Padrão de um conjunto de dados é 9. A variância é: \( \begin{array}{llll}\text { 10) } \\ \begin{array}{lll}\text { a) ( ) } 3 & \text { c) ( ) } 81 & \text { b) ( ) } 36\end{array}\end{array} \)

Bila diberikan sebuah sebaran normal dengan \( \mu=40 \) dan \( \sigma=6 \), hitunglah: a. Luas daerah di bawah 32 b. Luas daerah di atas 27 c. Luas daerah di antara 42 dan 51 d. Nilai x yang luas daerah di bawahnya \( 45 \% \) e. Nilai \( x \) yang luas daerah di atasnya \( 13 \% \)

\( \left. \begin{array} { l } { 5,5,8,3,12,10,18,15,12,16,20,18,20,20,24,26,25,28,25,30 } \\ { \qquad \overline { x } = 17.15 } \end{array} \right. \)

Josie is organizing her ribbons for a craft project. The list shows the length of each of her ribbons. \( 21.5 \mathrm{~cm}, 12.4 \mathrm{~cm}, 30.4 \mathrm{~cm}, 15.3 \mathrm{~cm}, 10.7 \mathrm{~cm}, 7.9 \mathrm{~cm}, 14.6 \mathrm{~cm}, 11.2 \mathrm{~cm} \) What is the median ribbon length? A. 12.4 cm B. 13.0 cm C. 13.5 cm D. 14.6 cm E. 15.5 cm

e) In order to get a better idea of how a given data point relates to other data, it is important to get an idea of how spread out the data are. One way of doing this is by using the range. The range is the distance between the highest and lowest data points in a set. What is the 'range' of the scores for this test?