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 civil service exam is given to 200 job applicants. In recent years, grades have followed a normal distribution with mean 66.5 and variance 100. The grades of the job applicants are distributed as follows:
Grades Observed FrequencyUnder 49.5 2249.5 - 59.5 3859.5 - 69.5 5669.5 - 79.5 5079.5 and over 34
a) Graph the observed frequencies on a histogram. Does the histogram appear to have the shape of a normal distribution with mean 66.5 and variance 100?
b) Test the hypothesis that the data came from a normal distribution with mean 66.5 and variance 100. Use a 5% level of significance.
Appalachian Coal mining believes it can enhance labor productivity and therefore net revenue by reducing air pollution in its mines. It estimates that the marginal cost function for reducing pollution by installing additional capital equipment is.
Using What's Best! (Or solver) find the least-cost matrix.
An electronic circuit board fails randomly with failure rate of λ=0.00021 /h. When it fails it is replaced by a new board.
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
The calculated Z test statistic is a positive value that leads to a p-value of .045 for the test. If the significance level (α) is .01, the null hypothesis would be rejected.
Set up hypothesis and two-tailed decision rule for right mean using 5% level of significance. Hypothesis for a two-tailed decision is?
Compare the percentage found in b) to percentage given by Empirical Rule and Chebyshev's Rule. (Make a table 3 x 3).
Would it be reasonable to conclude that the population mean is 63 pounds?
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
If the amount of cosmic radiation to which a person is exposed while flying by jet across the US is a random variable having the normal distribution with µ=5.35 mrem, and σ = 0.59 mrem.
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