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!
It has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. It has been thought that changing the speed limit from 65mph to 70mph would not increase the "typical" speed of 70 - 75mph. On one stretch of a highway the speed limit was increase from 65mph to 70mph. If the population mean speed on this stretch of the highway has been 68mph with a standard deviation of 5mph, what is the sample size needed to detect an increase in speed on this stretch of the highway of 10mph? Let alpha = 0.02 and beta = 0.05
Write the null and alternative hypotheses:
Draw the curves and label alpha and beta:
Calculate the sample size:
Determine whether the sampling method is independent or dependent for the following example. A researcher wants to know whether the newly issued "state" quarters have a mean weight that is different from "traditional" quarters.
Researchers at Pharm-X, a pharmaceutical company, are testing and comparing the effects of Drug A and Drug B on participants' allergies. The researchers are using a double-blind procedure to conduct their test.
A fastener manufacturing company uses a chi-square goodness of fit test to determine if a population of all lengths of ¼ inch bolts it manufactures is distributed according to a normal distribution.
the u.s. bureau of labor statistics produces consumer price indexes for several different categories. shown here are
Fip it 20 times and if it lands heads 17 times or more then the referee will designate that coin as the weighted one. a) If the coin the referee selects is fair, what is the probability that it gets designated as being weighted?
At the 0.05 level of significance, is there evidence of a difference in the mean waiting times in the four locations? State your null and alternative hypotheses. (Note: while the small sample size could justify use of the non- parametric Kruskal-W..
A SRS of size 16 drawn from a Normally Distributed population has a mean of 30 and a standard deviation, s, of 5. With 95% confidence, what is the interval that captures the true mean of the population?
If the pilot plant fails, Rob feels the chance of the full-scale facility succeeding is only 20%. The probability that the pilot plant will succeed is estimated at 0.6. Structure this problem with a decision tree and advise Rob what to do.
A chocolate bar is considered underweight if it weighs less than 8.0 oz. What proportion of chocolate bars weighs less than 8.0 oz?
drake marketing and promotions has randomly surveyed 200 men who watch professional sports. the men were separated
Find the mean and standard deviation for the numbers of boys in groups of 51. b) Is the result of 39 boys unusual? Does it suggest that the gender-selection method appears to be effective?
1.i wish to find a 95 confidence interval for the mean number of times men change channels with a remote control during
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