Final answer:
To provide the mean and standard deviation of a lognormal distribution, the mean and standard deviation of the variable's natural logarithm are required. Without these parameters, an exact answer cannot be calculated for the distribution of reaction times.
Step-by-step explanation:
The question pertains to modeling reaction times with a lognormal distribution, which is a continuous probability distribution of a random variable whose logarithm is normally distributed. The parameters of a lognormal distribution are typically denoted by the mean and standard deviation of the logarithm of the variable, not the variable itself.
To find the mean and standard deviation of the actual lognormal distribution, we would require these parameters, which have not been provided in the question. The mean of a lognormal distribution is given by e^(μ+σ^2/2) and the standard deviation is (e^(σ^2)-1)*e^(2μ+σ^2), where μ and σ are the mean and standard deviation of the variable's natural logarithm, respectively.
Since the question lacks these specific values, we cannot calculate the exact mean and standard deviation for the lognormal distribution of reaction times.