Describe test including the null and alternative hypothesis

Assignment Help Basic Statistics

Reference no: EM131405549

For each of the following situations, determine whether a one-tail test or a two-tail test would be appropriate. Describe the test, including the null and alternative hypotheses, then explain your reasoning in selecting it.

a. A machine that has not been serviced for several months is producing output in which 5% of the items are defective. The machine has just been serviced and quality should now be improved.

b. In a speech during her campaign for reelection, a Republican candidate claims that 55% of registered Democrats in her county intend to vote for her.

c. Of those who have bought a new car in the past, a dealer has found that 70% experience three or more mechanical problems in the first four months of ownership. Unhappy with this percentage, the dealer has heavily revised the procedure by which predelivery mechanical checks are carried out.

Reference no: EM131405549

Questions Cloud

Examine some of the causes and symptoms of employee burnout : Examine some of the causes and symptoms of employee burnout. Propose steps that management can take to reduce the possibility of employee burnout.

Carry out an appropriate hypothesis test : The supplier claims that no more than 2% of the items in the shipment are defective. Carry out an appropriate hypothesis test and comment on the credibility of the supplier's claim.

Marginal propensity to save : Assume an economy with no foreign sector, a marginal propensity to save of MPS = 0.1 and a marginal income tax rate of t = 1/3. If autonomous saving decreases by 300, which of the following is true?

Describe the adaptive work that needs to be accomplished : Describe the adaptive work that needs to be accomplished. Analyze your approach to resolving the problem. Be certain to include questions that would arise, and what trade-offs may be required in your analysis.

Describe test including the null and alternative hypothesis : Unhappy with this percentage, the dealer has heavily revised the procedure by which predelivery mechanical checks are carried out.

Identify what would constitute a type i error : If a transit employee provides a strand of hair for drug testing, state the null and alternative hypotheses in verbal terms, then identify what would constitute a Type I error and a Type II error in this situation.

Determining the organization marketing department : Scenario: You have been asked to assist your organization's marketing department to better understand how consumers make economic decisions.

Calculate the price of a four percent annual coupon bond : Calculate the price of a 15-year 4 percent annual coupon bond. Assume the market is yielding 5 percent on similarly risky instrument. Please show your work and explain why this is a premium or a discount bond.

Formulate and carry out a hypothesis test : The mean tensile strength for the bolts tested is 1385 pounds. Formulate and carry out a hypothesis test to examine the possibility that the bolts in the shipment might not be genuine.

User Account

All Pages