the times that gym members spend on a treadmill are normally distributed with a mean of 20 min and a standard deviation of 8 min

Question

2 years ago

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the times that gym members spend on a treadmill are normally distributed with a mean of 20 min and a standard deviation of 8 min

. there 240 who will use a treadmill today. about how many gym members are expected to spend 4 min and 36 min on a treadmill today?

Mathematics

1 answer:

Papessa [141] · Answer 1 · 2022-05-31T15:21:33+03:00

<span>Given:
xbar = 20 min
standard deviation = 8 min
total sample = 240

Required:
how many gym members are expected to spend 4 min and 36 min on a treadmill today

Solution:
sd</span>² = (∑(x - xbar)²) / N - 1

there are 42 gym members at 4 minutes and 200 gym members in 36 minutes.