Question 5 The final exam scores in a statistics class are normally distributed with a mean of 63 and a standard deviation of 5. \( 30 \% \) of the students scored more than what value? Add your answer Integer, decimal, or E notation allowed

\( \begin{array}{l} \text { d. } P(Z<z)=0.35 \\ \text { e. } P(Z<z)=0.9772\end{array} \)

umber of children in a school. If the mean of the istribution is 7 , find the; value of \( x \), (b) standard deviation of their ages.

If the variance of \( 2,5,7,10 \) and 14 is 17.04 then the variance of \( 6,15,21,30 \) and 42 is: \( \begin{array}{ll}\text { (a) } 17.04 & \text { (b) } 51.12 \\ \text { (c) } 153.36 & \text { (d) None of these }\end{array} \)

Choose the correct answer : The difference between the greatest value and the smallest value in a set of individuals is called \( \qquad \) (a) the range (b) the arithonatic mean (c) the median (d) the standard denies The positive square root of the average of squares of deviations of the valum from their mean is called \( \qquad \) (a) the range (b) the arithmetic meas (d) the median The mean of the values : \( 7,3,6,9 \) and 5 equals. \( \qquad \) (a) 3 (b) 6 (c) 4 (d) 12 The most repeated value in a set of values represents (a) the median (b) the range (c) the mode (d) the mean If the mean of numbers: \( 3 k-3,3 k-1,2 k+1,2 k+3 \) and \( 2 k+5 \) is 1 then \( \mathbf{k}= \) \( \qquad \) (a) -5 (b) 10 (c) 5 (d) \( \frac{1}{5} \) If the range of the values \( 2,7, a, 6 \) is 8 where \( a>0 \), then \( a= \) \( \qquad \) (a) 4 (b) 9 (c) -1 (d) 10 Which of the following values of (a) makes the range of the numbers : 53 , \( 58,57,60 \) and 55 equal to 9 ? (a) 63 (b) 61 (c) 51 (d) 50 Sum of values Number of these values \( \qquad \) (a) range (b) slandered deviation (c) mean (d) mode The most common measure of dispersion and most accurate is the \( \qquad \) (a) range (b) mean (C) the sumbard deviation (d) median If all individuals are equal in values, then \( \qquad \) (a) \( \bar{x}-\bar{x}>0 \) (b) \( \mathrm{x}-\overline{\mathrm{x}}<0 \) (c) \( \sigma=0 \) (d) \( \bar{x}=0 \) If \( \Sigma(x-\bar{x})^{2}=48 \) of a set of values and the number of these values \( =12 \) then \( \sigma= \) \( \qquad \) (a) -4 (b) -2 (c) 2 (d) 4

What is a scatter plot?