Los siguientes datos corresponden a ingresos en miles de dölares: \( 1,2 \quad 1,8 \quad 1,9 \quad 1,6 \quad 1,6 \) \( 1,9 \quad 1,2 \). Haga el intervalo de confianza del \( 95 \% \), para el verdadero promedio de los ingresos a. \( (1.6 ; 1.8) \) b. \( (1.32 ; 1.87) \) c. \( (1.2 ; 1.5) \) d. \( (1.65 ; 1.78) \)

Defina um diagrama de dispersão e explique sua utilidade na análise de dados.

The data below represents students' test scores. Which of the following is the median of the set of data?

Cite as características que um bom diagrama de dispersão deve ter para facilitar a interpretação dos dados.

Asich of the following relationships represents a positive correlation between two variables? As the number of miles driven increases, the amount of gasoline in the tank decreases. As the number of hours a person exercises decreases, the weight of that person increases. Aeceives increases, the growth rate of the plant increases. Ases, the student's overall grade remains the same.

1- Put the ( \( \vee \) ) mark against the statement if it is true and \( (x) \) if it false (10 POIN 1) The number of chlldren in a family is a qualitative data. 2) the mode is always found 3) For any two events \( A \) and \( B \) we must have \( P(A \cup B)=P(A)+P(B) \) 4) The sum of relative frequencies is 1 5) If the events \( A \& B \) are independent then \( \bar{A} \& \bar{B} \) are dependent 6) If the mean >median \( > \) mod the curve is skew from right. 7) The number of different permutations of word \( M I S S I S S I P P I \) is 3400 8) If the mode \( =24 \) and mean \( =60 \) then median \( =50 \). 9) In combination order is not important. 10) If \( X \) is a continuous random variable, then \( P(X=5)=0 \)