1to assess the accuracy of a kitchen scale a standard

Reference no: EM13353653

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: EM13353653

Questions Cloud

1a researcher wants to know if the average time in jail for : 1.a researcher wants to know if the average time in jail for robbery has increased from what it was several years ago

1an instructor wanted to construct a confidence interval : 1.an instructor wanted to construct a confidence interval for the mean gpa of the students in his class. he used the

1a radio station wants to know if residents in their area : 1.a radio station wants to know if residents in their area are in favor of a proposed tax increase. they invite

1i wish to find a 95 confidence interval for the mean : 1.i wish to find a 95 confidence interval for the mean number of times men change channels with a remote control during

1to assess the accuracy of a kitchen scale a standard : 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

1suppose we are testing the null hypothesis h0 micro 50 : 1.suppose we are testing the null hypothesis h0 micro 50 and the alternative ha micro ne 50 for a normal population

1crop researchers plant 100 plots with a new variety of : 1.crop researchers plant 100 plots with a new variety of corn. the average yield for these plots is x 130 bushels per

1 a random sample is collected of size n from a population : 1. a random sample is collected of size n from a population with standard deviation and with the data collected a 95

1experiments on learning in animals sometimes measure how : 1.experiments on learning in animals sometimes measure how long a laboratory rat takes to find its way through a maze.

User Account

All Pages