Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. (Sampling distribution & confidence interval) A random variable has a population mean equal to 1,573 and population variance equal to 952,021. Your interest lies in estimating the population mean of this random variable. (Of course, you do not know what the population mean and population variance are.) With that in mind, you take a representative sample of size 85 from the population of the random variable. You then use this sample data to calculate the sample average as an estimate for the population mean.
a) Using your knowledge about the central limit theorem (CLT), and assuming that the CLT has already "established itself" / "kicked in" when the sample size is 85, what is the probability that the sample average that you calculated will lie between 1,502 and 1,748?
b) You then use your sample data to calculate a 92% confidence interval for the population mean. Assuming that you can estimate the variance of the underlying random variable very precisely with your sample data, what should be the width of this confidence interval?
c) Suppose that now you would like to cut the width of your 92% confidence interval in half by increasing your sample size. What should be the size of your sample in order to achieve this goal?
Using ANOVA summary table, find out if regression model is significant.
A pharmaceutical firm as a sales rep
a small pilot study is conducted to investigate the effect of a nutritional supplement on total body weight. six
Find the number z such that 22% of all of observations that are less than z in a standard observations from a standard normal normal distribution is 0.98.
We are intersted in the number of students who prefer brand C cola. identify the distribution of the random variable and the mean,standard deviation.
the probability that sammy makes his own lunch is 0.75. the probability increases to 0.8 if he made his own lunch the
a explain the difference between a type i and type ii error and why failing to reject a null hypothesis is not the
What is the probability that the diameter of a single randomly chosen axle differs from the target value by 0.01 mm or more?
Construct ogive cure and numerical measures for the discrete data.
in the u. s. about 15 of the population is 65 years or older senior citizens. it is estimated that 90 of seniors get a
question the lifetime of a certain type of colour television picture tube is known to follow a normal distribution
the following data is the square footage in thousands of square feet and annual sales for a sample of 14 branches of
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd