26. A population has a mean of µ = 50 and a standard - deviation of o = 10. o= a. If 3 points were added to every score in the popula- tion, what would be the new values for the mean and standard deviation? b. If every score in the population were multiplied by 2, then what would be the new values for the mean and standard deviation?

# 6- A set of data items is normally distributed with a mean of 90 and a standard deviation of 5. Convert 90 to a z-score.

#20 psych stats: standard deviation show full work

The table below shows the summary statistics of the sales ($) made by company ABC in 2022. No. of month 12 134,562 135,000 48,997 95,000 185,000 90,000 Mean Median S.D Minimum Maximum Range The monthly profit should be adjusted by multiplying 0.88 then subtracting $30,000. Without calculating the profit for each month, find the new standard deviation of profit for 2022? (2 d.p.)

#25 - Total cholesterol in children aged is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4 . What proportion of children aged 10-15 years of age have total cholesterol below 180 ?

Question 9 Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 64.7 inches tall. (to 2 decimal places)