Which of the following is the range of proportions that is within one standard deviation of the sampling proportion mean when the standard deviation is 0.02 and the mean is 0.22?
0.24≤x≤0.30
0.24 less-than-or-equal-to x less-than-or-equal-to 0.30
0.18≤x≤0.26
0.18 less-than-or-equal-to x less-than-or-equal-to 0.26
0.16≤x≤0.28
0.16 less-than-or-equal-to x less-than-or-equal-to 0.28
0.20≤x≤0.24
0.18≤x≤0.26
0.18 less-than-or-equal-to x less-than-or-equal-to 0.26