If Z is a standad normal random variable, then 50% of all possible values of Z are less than________?

Suppose X and Y are two independent random variables with:        X     Y      mean       2       -4      st dev     3     3   The mean of X+Y is  .The standard deviation of X+Y is  (to two places after the decimal).

Let X1, X2, ... be a sequence of random variables with finite mean u and non-zero variance o?. Let S, = X;. Which random variable has meanequal to 0 and variance - equal to 1? Select one: S-np O a. Zn Vno Sn-H O b. Zn Vno O c. Zn Vño O d. Zn Vno

Classify the following random variables as DISCRETE or CONTINUOUS.1. Length of a cell phone charger              ____________________2. Number of gadgets in a household      ____________________3. Count of words encoded per minute    ____________________4. Amount of water consumed per day    ____________________5. Sum of burgers sold in a day                  ____________________6. Amount of time needed to boil a liquid   ____________________7. Number of channels in a cable TV           ____________________8. Daily count of visitors in a mall                ____________________9. Distance between two barangays             ____________________10.Total area of a rice field                             ____________________11.Growth of a child per year                         ____________________12.Temperature needed to bake bread         ____________________13.Number of babies born per day                 ____________________14.Yearly death due to cancer…