A teacher instituted a new reading program at school. after 10 weeks in the program, it was found that the mean reading speed of a random sample of 21 second grade students was 94.8 wpm. what might you conclude based on this result? select the correct choice below and fill in the answer boxes within your choice

0.0139

Explanation:

Given that:

The number of sample (n) = 21

The sample distribution has mean (μ) and a standard deviation of σ/√n

The z score is given as (x - mean)/ standard deviation

x = 94.8 wpm, let us assume that σ = 10 and μ = 90

Therefore: z = (x - μ) / (σ/√n) = (94.8 - 90) / (10/√21) = 2.2

To calculate the probability using Z table:

P(X>94.8) = P(Z>94.8) = 1 - P(Z<94.8) = 1 - 0.9861 = 0.0139

The probability is low that is less than 0.05, the program is more effective than the old one.

c is the answer, and do you have a ps4?