1)The average wages of the 2,000 hourly workers at Neco Steels is $12.50 with a std deviation of $3.25. What percentage of the workers make hourly wages between 1.63 std deviations around the mean?

Share the steps by steps in manual calulation (no internet and website)

Answer :62.36% comment- 1-1/ksqaure

2)The average wages of the 2000 hourly workers at Neco Steels is $12.50 with a std deviation of $3.25. At least how many workers make hourly wages between $6.89 and $18.11?

Answer- About 1328 --- comment-K = 1.72615

3)The average wages of the 2,000 hourly workers at Neco Steels is $12.50 with a std deviation of $3.25. The underlying distribution is Normal (Bell-shaped). What is the hourly wage range for the middle 95% of the workers?

Answer-(12.50 - 6.50, 12.50 + 6.50)--- comment-Normal Distribution property