To find the position we use (n+1)x p% I have answered the problem. I don\'t have
ID: 3272498 • Letter: T
Question
To find the position we use (n+1)x p%
I have answered the problem. I don't have any way to check whether it's correct or not. The flights on time (in percentage) of some airline carriers are given as follows: Table 1: Flights on Time. 82 88 76.1 83.5 78.1 77.3 94.7 87.4 79.3 82.7 85.4 79.8 80 87.8 77.5 87.9 86.4 76.7 n=18 1. Determine the class frequency table. 2. Sketch the graph of the frequency histogram. 3. Compute the following the sample mean, sample variance, and sample standard deviation of the dataset. . The sample mean . The sample variance . The sample standard deviation 4. Find the 90t% percentile, 251th percentile, and the interquartile of the flights time dataset.
Explanation / Answer
Solutioin3:
sample mean=sum of observations/total observations
=82+88+76.1+83.5+78.1+77.3+94.7+87.4+79.3+82.7+85.4+79.8+80+87.8+77.5+87.9+86.4+76.7/18
=1490.6/18
=82.81
sample mean=82.81
flights on time(x) mean(xbar) x-xbar (x-xbar)^2 82 82.81 -0.81 0.6561 88 82.81 5.19 26.9361 76.1 82.81 -6.71 45.0241 83.5 82.81 0.69 0.4761 78.1 82.81 -4.71 22.1841 77.3 82.81 -5.51 30.3601 94.7 82.81 11.89 141.3721 87.4 82.81 4.59 21.0681 79.3 82.81 -3.51 12.3201 82.7 82.81 -0.11 0.0121 85.4 82.81 2.59 6.7081 79.8 82.81 -3.01 9.0601 80 82.81 -2.81 7.8961 87.8 82.81 4.99 24.9001 77.5 82.81 -5.31 28.1961 87.9 82.81 5.09 25.9081 86.4 82.81 3.59 12.8881 76.7 82.81 -6.11 37.3321 total 453.2978 variance= 453.2978/18-1 variance= 453.2978/17 variance=26.66458 standard deviation=sqrt(variance) =SQRT(26.66458) std dev'= 5.163776