Name:Lydia GeorgeDate: 4/24/14Topic One: Mean, Variance, and Standard DeviatiPlease type your answer in the cell beside the question.Please type you answer in the cell beside the question.1. Identify the sampling technique being used. Every 20th patient thatemergency room is given a satisfaction survey upon their discharge.a. random samplingb. cluster samplingc. systematic samplingd. stratified samplinge. none of the above2. The formula for finding the sample mean is _________________.a. �=�∙�b. � =(∑1▒� )/�c. =/� =�/�d. =/�=�/�e. None of the above3. The formula for finding sample standard deviation is ____________a.a.�=∑1▒�−�▒−^2b.b.(−/�^2=(∑1▒(�−�)^2 )/�c.c.�^2=(∑1▒(�−�)^2(−/)/�d.d.�^2=(∑1▒(�−�(−()^2 )/(�−1)e.noneoftheabovee. none of the above4.4. TheThe computationcomputation formform forfor samplesample variancevariance isis __________________________________a.a. =∙�^2=�∙�b.b.�^2=(∑1▒�^2 −(∑1▒�)^2)/�c.c.�=√((�^2())d.d.�=�/�=/e. none of the abovee. none of the abovec.�=√((�^2())d.d.�=�/�=/e. none of the abovee. none of the above5. The following is the heart rate for 10 randomly selected patients onmean, variance, and standard deviation of the data using the descriptin the data analysis toolpak.75, 80, 62, 97, 107, 59, 76, 83, 84, 696. The following is a frequency distribution fo the number of times patilight in a days time. X is the number of times the call light is used and(meaning the number of patients). Create a histogram of the data.Xf123456789102475731513106dard Deviationn.20th patient that comes into theheir discharge.1C2B___________.s ________________.______________.______________.3E4Bcted patients on the unit. Find theing the descriptive statistics optionber of times patience use the callght is used and f is the frequencyof the data.5 mean= 79, SD= 146