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!
Q1) Do middle-aged male executives have different average blood pressure than general population? National Center for Health Statistics reports that mean systolic pressure for males ages 35 to 44 is 128 and standard deviation of this population is 15. Medical director of company looks at medical records of 72 company executives in this age group and determines that mean systolic blood pressure in this sample is 126.07. Is this evidence that executive blood pressures vary from national average? Use 5% level of significance.
Q2) A sample of 25 different payroll departments determined that employees worked average of 310.3 days year with standard deviation of 23.8 days. Determine the 90% confidence interval for average days worked by employees in all payroll departments?
a) 301.0 < µ < 319.6
b) 298.0 < µ < 322.6
c) 302.4 < µ < 318.2
d. 314.1 < µ < 316.8
Q3) A previous study of nickels showed that the standard deviation of the weight of nickels is 150 milligrams. How many nickels does a coin counter manufacturer need to weigh so that she can be 98% confident that her sample mean is within 25 milligrams of true average weight of nickel?
a) 36
b) 195
c) 239
d) 139
Q4) Food snack manufacturer samples 15 bags of pretzels off assembly line and weighed their contents. If sample mean is 10.0 and sample standard deviation is 0.15, determine 95% confidence interval estimate for the true mean.
a) (9.96, 10.04)
b) (9.68, 10.32)
c) (9.97, 10.80)
d) (9.92, 10.08)
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
Define the decision rule. Calculate the value of the test statistic.
Gas consumption of 3 cars (labeled car A, car B, and car C) using 4 different kinds of gasoline. Is there difference among kinds of gasoline?
Find the sample size for the 95% confidence interval used to estimate the population proportion.
Since she is allowed to reserve one time if her first serve is out what should her serving strategy be?
A sample of approx 25 students enrolled in the university points out that X (bar) = $315.4 and s = $43.20.
Discuss possible study designs. Which of the designs would we use to test our research hypothesis?
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
Solution throughout graphical method. Produced by a company linear programming model is used to describe the production schedule.
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
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