Thank you for the opportunity to help you with your question!
According to the standard normal distribution chart, 70 percent corresponds to a Z value of 0.52
Z = (171 - 157) / SD = 0.52 where SD is the standard deviation
14 / SD = 0.525
SD = 14 / 0.525
SD = 26.67
How did you get a z value of 0.52?
nvm i got it THANK YOU SO MUCH FOR THE HELP
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