If the number of degrees of freedom for a chi-square distribution is 32, Determine the population mean and standard deviation. Please explain how you derived the answer

Pearson publishes textbooks each semester and the mean number of textbook pages published by Pearson for 2020 is 568 with a standard deviation of 150 pages.  What is the chance you will have to read a textbook published by Pearson in 2020 that has more than 733 pages? Write your answer as a percent.

A quantitative data set has mean 15 and standard deviation 2. what is percentage lies between 13 and 17

The average age of class is 22.3 years. The standard deviation is 4.7 years. If the variable is normally distributed, find the age that corresponds to the 94th percentile. SHOW WORK HOW YOU GOT THAT

The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5 years, find the z-scores corresponding to the oldest and youngest senators of age 86 and 46. Round z scores to two decimal places.

Please show working outs.

If you buy one ticket everyday for 365 days, find the mean and standard deviation for the numbers of winning tickets in such groups of 365 tickets. Round to three decimal places

Explain the statistics measure standard deviation. Provide the formulas used to calculate the standard deviation of a sample and of a population.  Explain the difference between sample and population.

Please see attachment

The average age of Amtrak passenger train cars is about 20 years.  If the distribution of ages is normal and 10% of  the cars are older than 24 years, find the the standard deviation.