What is the p-value for a test of the hypotheses

Reference no: EM137727

1. To assess the accuracy of a kitchen scale a standard weight known to weigh 1 gram is weighed a total of n times and the mean,x' , of the weighings is computed. Suppose the scale readings are Normally distributed with unknown mean, µ, and standard deviation σ = 0.01 g. How large should n be so that a 90% confidence interval for µ has a margin of error of ± 0.0001?

A. 165
B. 27061
C. 38416

2. What is the P-value for a test of the hypotheses H₀: μ = 10 against H_a: μ ≠ 10 if the calculated statistic is z = 2.56?
A. 0.0052
B. 0.0104
C. 0.9948

3. I have computed a 95% confidence interval for the mean, μ, of a population as (13, 20). Based on this interval, we can say
A. a null hypothesis that μ = 14 is not rejected at α = 5%.
B. a null hypothesis that μ = 24 is rejected at α = 5%.
C. Both choices are correct.

Reference no: EM137727

Questions Cloud

What is the p-value of the test : What is the P-value of the test, assume the standard deviation is 3 years, a 95% confidence interval for the average time

What is confidence interval for the average number of chips : how many chocolate chip cookies will he need to sample to estimate the mean to within 2, what is a 99% confidence interval for the average number of chips per cookie?

I want to construct a confidence interval : A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.

The correct set of hypotheses : How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses

What is the p-value for a test of the hypotheses : How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses

Find the confidence interval for the mean : How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test

Determine if the improvement is of practical significance : determine if the improvement is of practical significance one should. Crop researchers plant 100 plots with a new variety of corn. The average yield for these plots is x' = 130 bushels per acre

Produce a new confidence interval : Which of the following would produce a new confidence interval with smaller width based on these same data and produce a new confidence interval

Complete the maze : Assume the researcher's rats can be considered an SRS from the population of all laboratory rats. The mean Math SAT score of these students is found to be 560, 80 points higher than the national average.

User Account

All Pages