Given that there are 30 students in a class taking an exam. The average for Past years is μ0=86, σ= 7. This year, the test class average, y= 88.4 with α=0.05. Find the power of the test if the true mean is μ= 87.7

Given that there are 30 students in a class taking an exam. The average for Past years is μ0=86, σ= 7. This year, the test class average, y= 88.4 with α=0.05. Find the power of the test if the true mean is μ= 87.7

Name: Given that there are 30 students in a class taking an exam. The averag
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Given that there are 30 students in a class taking an exam. The average for Past years is μ0=86, σ= 7. This year, the test class average, y= 88.4 with α=0.05. Find the power of the test if the true mean is μ= 87.7

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter44: Solution Of Equations By The Subtraction, Addition, And Division Principles Of Equality

Section: Chapter Questions

Problem 5A

See similar textbooks

Similar questions

Assume that ρxy = .30 between weight and exercise for the population of normal adults. However, a researcher believes the relationship is stronger for children. The researcher tests a sample of 28 children and obtains an rxy = .47. Does this result support the researcher’s belief? Conduct an appropriate statistical test using an alpha level of .05.
The variable X, is the carbon monoxide concentration in air, and ten measurements are obtained as follows: 10.25, 10.37, 10.66, 10.47, 10.56, 10.22, 10.44, 10.38, 10.63, 10.40 mg/m3 . (i) Test whether the mean concentration of carbon monoxide in air is 10.00 mg/m3 . (ii) Calculate the power of the above test if the mean concentration of carbon monoxide in the alternative hypothesis is assumed to be 10.75mg/m3 .
If X is normally distributed and P(X<20)=0.5 and P(X>26)=0.0228, find the mean and standard deviation of X. Give a detailed solution
For a population with µ = 40 and σ = 8, what is the X value corresponding to z = 1.50?
Suppose the relationship between Y and X is given by: Y = 3.1415 + 6X + error By how much does the expected value of Y change if X increases by 10 units? (Round your answer to two decimal places: ex: 123.45)
A new insecticide is advertised to kill more than 95% roaches upon contact. In a laboratory test, the insecticide was applied to 400 roaches and 384 died immediately after contact. Is this sufficient evidence to support the advertised claim? Use α=0.05. (c) p-value for the problem above i
Suppose the relationship between Y and X is given by: Y = 1,788,302 + 160.87*X + error By how much does the expected value of Y change if X increases by 23.09 units? (Round your answers to two decimal places; ex: 123.45.)
For a population with μ = 60 and σ = 8, the X value corresponding to z = -0.50 would be?
To see the effect of a relatively small error in the estimate of the amount of carbon-14 in a sample being dated, consider this hypothetical situation: a. A bone fragment found in central Illinois in the year 2000 contains 17% of its original carbon-14 content. Estimate the year the animal died. b. Repeat part (a), assuming 18% instead of 17%. c. Repeat part (a), assuming 16% instead of 17.
The weights of radish seeds are normally distributed, with µ = 0.12 g and σ = 0.02 g. What is the z-score of a radish seed that weighs 0.093 g? If the contents of a seed packet weighs 30.0 g, approximately how many seeds are in it? Approximately how many seeds in the packet weigh between 0.08 g and 0.16 g.?
Given a 95% C.I. = (34.14 mm, 36.02 mm) for a sample of Wooly Bear caterpillar lengths (preceding problem), address the following. Based upon the above information, I am _____ % confident that the 95% C.I. contains the sample mean.
Assume that you have calculated an observed z-value for a single measured value to -1.62. What proportion of all values can we expect to be lower than the current measured value? How do we calculate this?