10. Suppose X is normally distributed with u=11 and o = 2. Find each of the following b. P[6

A random sample from a normal population has:n = 8, X-bar = 16, and s = 3. Find the 95% PI for asingle new value from the population.

Almost all employees working for financial companies in New York City receive large bonuses at the end of the year. A sample of 65 employees selected from financial companies in New York City showed that they received an average bonus of $53,000 last year with a standard deviation of $21,000. Construct a 99% confidence interval for the average bonus that all employees working for financial companies in New York City received last year. Round your answers to cents. 24 i to $ i

A 28th percentile corresponds to O a. an area corresponding to a z score of -o.28 O b. a data value associated with an area of o.28 to its left O c. an area corresponding to a z score of o.28 O d. a data value associated with an area of o.28 to its right

1. What percentage of scores fell within ±1 SD for ZADHD?

fly? ] 5. To compare two types of sandy soil, n1 of soil A and n2 = = 100 measurements are to be taken on the porosity 50 measurements are to be taken on soil B. Assume that o? 0.01 and o; = 0.02. Find the probability that the difference between the sample means will be within 0.05 unit of the difference between the population means ui – µ2.

For a population with u = 100 and o = 20, what is the X value corresponding to z = 1.50? O 130 O 30 O 115 O 101.5

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.5 Find the mean value of y = x +x + x° over the range 0 < x < 2. Enter your answer as a decimal in the box below, to two decimal places. %3D

TF.10 The diameter X in inches of a certain brand of tennis balls has normal distribution with mean μ = 2.65 and standard deviation σ = .018. Acceptable balls have diameters between 2.62 and 2.68 inches. a) What proportion of tennis balls of this brand are acceptable? b) Find P(X < 2.60)