# Question

In the standard normal distribution, find the values of z for the 75th, 80th, and 92nd percentiles.

## Answer to relevant Questions

Find P (– 1 < z Graph by hand the standard normal distribution by using the formula derived in Exercise 57. Let π ≈ 3.14 and e ≈ 2.718. Use X values of – 2, – 1.5, – 1, – 0.5, 0, 0.5, 1, 1.5, and 2. (Use a calculator to compute ...The average teacher’s salary in North Dakota is $37,764. Assume a normal distribution with σ = $5100. a. What is the probability that a randomly selected teacher’s salary is greater than $45,000? b. For a sample of 75 ...In a recent year, Delaware had the highest per capita annual income with $51,803. If σ = $4850, what is the probability that a random sample of 34 state residents had a mean income greater than $50,000? Less than $48,000? The standard deviation of a variable is 15. If a sample of 100 individuals is selected, compute the standard error of the mean. What size sample is necessary to double the standard error of the mean?Post your question

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