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You believe the annual mean vehicle miles of travel per household is greater than 22,000 miles. You do some research and find that a random sample of 36 US household has a mean annual VMT of 22,200 miles with a standard deviation of 775 miles. You conduct a statistical experiment where null hypothesis is less than and equal to 22,000 and alternative hypothesis is greater than 22,000. At level significance 0.05, explain why you cannot reject null hypothesis.
What is the probability the ACC will have a team in the championship game and what is the probability that the championship game will not have a team from one of these two conferences
The variance of some data is 37.33 what is the standard deviation?
Terry wants to purchase a used car for $8000. The dealer offered to finance the deal at 8.5% APR for 4 years with 10% down payment. Terry's bank will provide a loan at 7.8% for 3 years
Solve the following initial value problem over the interval from t=0 to 2 where y(0)=1 a. Euler method with step h=0.5 b. Midpoint method with h= 0.5
Are X and Y independent?
A bar is under uniform axial loads. AB is 1 foot and has a area of .5 in^2 and BC is 1 foot and has an area of .3 in^2. AB has a 1000lb force putting it under tension and BC has a 500lb force putting it under compression. Find stresses in AB and BC a..
Find the optimal order quantity.
A bar 25in long attached to one wall was heated by 100 degress F. There is a .5 in gap between the bar and the other wall. The area of the bar is .5 in^2.The coefficient for expansion is .0004/F and the modulus of elasticity is 230 ksi. Find the fina..
the relevant range, will the fixed manufacturing cost per unit increase, decrease, or remain the same? Explain - Compute Variable manufacturing cost per unit
If an operator can handle at most five calls per minute, what is the probability that the operator will be unable to handle the calls in any 1-minute period?
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
Average length of trout caught in Swanson lake is u=19.For a random sample of 51 fish caught the mean length was xbar=18.5 inches with estimated standard deviation s=3.2 inches.
What linear transformation will change sixth grade scores x into new scores xnew= a+bx that have the desired mean and standard deviation?
The sample mean talk time was 315 minutes with a standard deviation of 24 minutes. Why can we say that the sampling distribution of x is approximately normal?
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours
At the 0.01 level of significance, can the student group conclude that there is a difference in average textbook prices for new textbooks sold on campus and over the Internet?
Suppose that a survey is being planned for purposes of estimating the average number of hours spent exercising daily by adults (18 years of age or older) living in a certain community.
Analyze (T Test), Analyze (Chi Square), Improve (DOE), Improve (Scatter Diagram), Scatter, Control (XmR Chart), and Control (Pp Ppk) from the manufacturing project?
Not take SRS of 25 students who took test. What are the mean and standard deviation of sample mean score xbar of these 25 students?
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