Computing population mean and population standard deviation

Reference no: EM1317231

Q1) Following data are number of cars passing a point on highway per minute: 10, 12, 11, 19,22,21,23,22,24,25,23,21,28,26,27,27,29,26,22,28,30, 32,25, 37, 34, 35, 62. Create a stem-and-Leaf display of these data. What does display tell you about the data?

2) Following data are number of tons shipped weekly across Pacific by a shipping company.

398,412,560,476,544,690,587,600,613,457,504,477,530,641,359,566,452,633,474,499,580,606,344, 455,505,396,347,441,390,632,400,582

Suppose these data represent whole population. Determine the population mean and population standard deviation.

Q3) At certain university, 30% of students who lake basic statistics are first-year students, 35% are sophomores, 20% are juniors, and lo% are seniors. From records of statistics department it is determined that out of first-year students who take basic statistics course 20% get As; out of sophomores who take course 30% get As, out of juniors 35% get As; and out of seniors who take course 40% get As. Provided that student got an A in basic statistics, determine the probability that she or he is senior?

Reference no: EM1317231

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