3) 62, 52, 52, 52, 64, 69, 69, 78

For the given sample data, find the value of -

a) the standard deviation._____9.69________

b) P15" style="box-sizing: border-box; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 0px; max-width: 100%; height: auto; display: inline; vertical-align: middle; line-height: inherit; max-height: 31.25rem;">____Blank 2_______

c) The percentile rank of a score of 64 _______Blank 3________