Standard deviation of the sampling distribution
Random samples of size 225 are taken from an infinite pouplation in which 90% of the items have a particular characteristic. What are the mean & standard deviation of the sampling distribution for p-hat?
Expected delivery within 24 Hours
Thirty-three college freshmen were randomly chosen for on-campus survey at their university. The participants' mean GPA was 2.5, and the standard deviation was 0.5. Determine the margin of error, supposing a 95% confidence level? (Assume a normal
The lifetime of a special type of bulb is exponentially distributed with the mean of 30 hours. A bulb is employed till it fails, at which point it is replaced by the new one.
Determine the conditional probability that someone has the disease, given a positive test result? Hint: you need to be familiar with the Bayes rule and the total probability rule.
A sample of 400 observations will be taken from the infinite population. If the population proportion is 0.80, what is the probability that p-hat will be greater than 0.83?
For each given p, let Z have the binomial distribution with parameters p and N. Assume that N has binomial distribution with parameters q and M. Formulate Z as a random sum and show that Z has binomial distribution with parameters pq and M
Random samples of size 100 are taken from infinite pouplation in which 20% of the items have a specific characteristic. What is that probability that the sample proportion observed in any random sample of 100 will be betwen 0.1216 and 0.2784?
A population consisting of 500 items has the mean of 150 and standard deviation of 25. If random samples of size 100 are taken, determine the value of the standard deviation of the sample average?
An unbiased estimator will have a value, on average, that is equal to the value of the population parameter it estimates, regardless of sample size. True or False?
1931582
Questions Asked
3,689
Active Tutors
1443431
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Identify one key relationship you have currently in your life (My mom, and we have a great relationships). What is that person and how would you describe that
According to Freud's Psychosexual Development, which stage are Jeffrey's symptoms consistent with?
Question: George's behavior may be less about the specific substance and more about replacing a deeply ingrained ritual.
1. Explain the controversy that surrounds personality and paraphilic disorder. 2. Explain your professional beliefs about this disorder, supporting
Take on the perspective of someone engaged in recruitment for human trafficking (such as a trafficker, pimp, or recruiter).
Some factors that contribute to a child being accepted or rejected by their peers can be their communication skills such as how the listen and respond to peers.
Question: You may not have alignment between your personal purpose and the corporate purpose in every job.