Normal distribution and critical z-value

Assignment Help Basic Statistics

Reference no: EM13103338

1. The net profit of an investment is normally distributed with a mean of $10,000 and a standard deviation of $5,000. The probability that the investor's net profit will be between $12,000 and $15,000 is _____________.

a) 0.8413

b) 0.1859

c) 0.4967

d) 0.3413

2. When the rod shearing process at Stockton Steel is "in control" it produces rods with a mean length of 120 inches. Periodically, quality control inspectors select a random sample of 36 rods. If the mean length of sampled rods is too long or too short, the shearing process is shut down. Sarah Shum, Director of Quality Programs, chose a 0.05 level of significance for this test. The critical z values are _________.

a) -1.75 and 1.75

b) -1.96 and 1.96

c) -1.645 and 1.645

d) -2.33 and 2.33

Reference no: EM13103338

Questions Cloud

Illustrate what are the major pros and cons of jit : Illustrate what are the major pros and cons of JIT and lean manufacturing systems? Illustrate what do they have to do with nonvalue added or wasted activities?

Coin flipping problem and sse calculation : A coin is flipped 5 times in a row. What is the probability that it will come up heads all 5 times? For the data in question above, calculate the Sum of Squares Error (SSE).

Capturing the true-mean of the population : A SRS of size 16 drawn from a Normally Distributed population has a mean of 30 and a standard deviation, s, of 5. With 95% confidence, what is the interval that captures the true mean of the population?

Federal-plus-state marginal tax bracket : federal-plus-state marginal tax bracket and that capital gains taxes are deferred until maturity. Assuming equal investment risk and a horizontal yield curve.

Normal distribution and critical z-value : The net profit of an investment is normally distributed with a mean of $10,000 and a standard deviation of $5,000. The probability that the investor's net profit will be between $12,000 and $15,000 is _____________.

Find the magnitude of the charges : Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.

Organization select to utilize third-country materials : What are the advantages as well as disadvantages of using home-country, host country and third country nationals? Under what precise circumstances might an organization select to utilize third-country materials? Explain thoroughly your answer in e..

Students will score differently on standardized test : A researcher believes that if she uses a different text the students will score differently on the standardized test but she doesn't know what the difference is.

Illustrate what medical leave issues of concern to employers : Illustrate what medical leave issues are of concern to employers? In illustrate what ways would human resource managers be involved?

User Account

All Pages