Question CAN YOU ONLY ANSER CLAIM 2? Determine which type of hypothesis test is appropriate (if any) in each situation. Type 1: test a population mean, population standard deviation is known Type 2:...

Determine which type of hypothesis test is appropriate (if any) in each situation.

Type 1:test a population mean, population standard deviation is known

Type 2:test a population mean, population standard deviation is unknown

Type 3:test  a population proportion

Clearly state the null and alternative hypothesis. Then, compute the test statistic, and determine the conclusion of the test.You may compute a p-value or use critical values to determine the conclusion of the test.

• A publisher reports that 25% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually above the reported percentage. A random sample of 300 found that 31% of the readers owned a laptop. Is there sufficient evidence at the 0.10 level to support the executive's claim?
  
  
  
  


• Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.7 parts/million (ppm). A researcher believes that the current ozone level is larger. The mean of 23 samples is 8.1 ppm with a standard deviation of 0.7. Does the data support the claim at the 0.025 level? Assume the population distribution is approximately normal.
  
  
  
  


• The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.05 level that the medicine relieves pain in more than 320 seconds. For a sample of 32 patients, the mean time in which the medicine relieved pain was 325 seconds. Assume the population standard deviation is 23. Make the decision to reject or fail to reject the null hypothesis