Reference no: EM131082700
Question:
1. A simple random sample of 50 speeds (in mph) is obtained from cars on a section of I-95 through Ft. Lauderdale, FL. The Sample has a mean of 67.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greater than the posted speed limit of 65 mph.
2. A simple random sample of 50 speeds (in mph) is obtained from cars on a section of I-95 through Ft. Lauderdale, FL. The Sample has a mean of 67.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greater than the posted speed limit of 65 mph. Assuming that a statistical software analysis routine such as stat-crunch computed a p-value of 0.01635. What would be the true statement?
3. When planning for construction of a parkway, engineers must consider the weights of cars to be sure that the road surface is strong enough. A simple random sample of 35 cars yields a mean of 3,500 lb. and a standard deviation of 525 lb. Use a 0.01 significance level to test the claim that the mean weight of all cars is less than 3,700 lb. show all 8 steps.
- State in symbolic form the claim:
- State in Symbolic form the opposite of the claim:
- State in symbolic form the null and alternate hypotheses:
- State the significance level or (a)
- Verify that the technical conditions are satisfied.
- Based upon the statcrunch analysis, what is the p-value for your hypothesis test?
- What is your conclusion about the null hypothesis? Fully justify your conclusion by referring to the P-value and the significance level.
- What is your conclusion about the claim made in the statement of the problem?
- 4.This Question requires the use of "Data Set 1 Body Measurement (Males) available in StatCrunch.
- At the 0.05 significan level, test the claim that the average weight of all men is less than or equal to 77kg: State all 8 steps.
5. In a recent Gallup Poll of 511 adults, 327 said that they were in favor of the death penalty for a person convicted of murder. We want to use a 0.01 significance level to test the claim that more than 50% of adults are in favor of the death penalty for a person convicted of murder. Show all 8 steps.
6. In on study of 71 smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment and 32 were not smoking one year after the treatment. Use 0.05 significance level to test the claim that among smokers who try to quit the nicotine patch therapy, more than 50% are smoking one year after the treatment. Show all 8 steps.
Vote for the democratic incumbent
: Of the 500 surveyed, 350 said they would vote for the Democratic incumbent. Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
|
What happens to the equilibrium quantity
: What happens to the equilibrium quantity? Plot the demand and supply curves using the table you completed above.Be sure to label the axis. Use S to denote the supply curve and D to denote the demand curve.
|
What are the total costs for direct labour
: What are the types of direct costs identified in this case? Why are they viewed as direct costs - what are two forms of costs identified?
|
Obtain formulas for estimating the variance components
: Obtain formulas for estimating the variance components
|
Statistical software analysis routine
: Assuming that a statistical software analysis routine such as stat-crunch computed a p-value of 0.01635. What would be the true statement?
|
Use the restricted form of the mixed model
: Obtain the expected mean squares for this situation and modify the previous analysis appropriately. Use the restricted form of the mixed model.
|
Point of entire exercise
: We are in week 4, and you are still quoting only your opinion. You are missing the point of this entire exercise, let me restate it. 1. Develop APA writing skills and styles, (Get the personal articles out of your words (I, me, mine, yours, the..
|
What are the pros of emerging adulthood this period of life
: Use at least 2 concepts/etc. from your textbook that support the view that the developmental stage of emerging adulthood has drawbacks. What are the "cons" of this period of life? Additionally, find at least least one reputable source outside ..
|
What are the major phases of work for making an ebook
: Why is it important to have a defined project scope? Why is it important to make sure there is agreement about the scope and what will be done in producing each eBook?
|