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!
A recent survey described the sleep time of college students as normally distributed with a standard deviation of 1.15 hours and a mean of 7.02 hours. Suppose we wish t take a simple random sample of size 81 from the population of college students and examine the sleep time. Let X be he vector of 81 observation and let X ( x ahd bar on top) be the sample mean and s the sample standard deviation.
a) About what should be calculated sample mean of X be?
b) About what should be calculated sample standard deviation of X be?
c) What is the standard deviation of distribution of X ? ( x has bar on top)
d) About how many of the 81 students sleep less than 6 hours?
e) About how many of the 81 students sleeo between 6.52 and 7.52 hours.
f) What is the probability that X is below 6.9 hours? ( x has bar on top)
Calculate the population mean and population standard deviation.
salt-free diets are often prescribed to people with high blood pressure. the following data values were obtained from
the probability that any given person is allergic to a certain drug is .03. what is the probability that none of three
How many ships must be included in the sample if the CEO wants the error to be within 0.02 and a confidence level of 95% if: there is no information available that could be used as an estimate of the population proportion?
Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time.
according to usa today snapshot 3 of americans surveyed lie frequently. you conduct a survey of 500 college students
a professor of mathematics refutes the claim that the average student spends 4.5 hours studying for the final
Three are selected, at random, without replacement from the batch. What is the probability that the third is not defective given that one of the previous two are defective?
The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.
Should the engineering firm be concerned? Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
A University of Omaha is concerned that out of state students may be receiving lower grades than in state students. Two independent random samples have been selected: 165 observations from population 1 (Out of state students) and 177 from population ..
there are six ways in which a person and the situation interact to shape a persons goals thoughts feelings and
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