Write the Following Expression as a Summation $x_{1}{ }^{2}+x_{2}{ }^{2}+\ldots+x_{15}{ }^{2}$

Q19: Write the following expression without summation

Q20: The prices (in dollars) of 16

Q21: For a set of data which contains

Q22: The frequency distribution of grades on

Q23: The number which appears most often in

Q25: The prices (in dollars) of 16

Q26: When calculating the mean for grouped data,

Q27: The median of an odd number of

Q28: Which of the following measures is

Q29: The measure of location that is used