Suppose a consumer group suspects that the proportion of hou…

Suppose a consumer group suspects that the proportion of households that have three cell phones is 30%. A cell phone company has reason to believe that the proportion is not 30%. Before they start a big advertising campaign, conduct a hypothesis test. Their marketing people surveyed 150 households with the result that 43 of the households have three cell phones. A. Draw the normal curve to indicate what kind of test (one or two tailed) B. Null and Alternative Hypothesis C. Calculator or Desmos function used D. Test Statistic and P-Value E. Final conclusion that addresses the original claim. 

Jeffrey, as an eight-year old, established a mean time of 16…

Jeffrey, as an eight-year old, established a mean time of 16.43 seconds for swimming the 25-yard freestyle, with a standard deviation of 0.8 seconds. His dad, Frank, thought that Jeffrey could swim the 25-yard freestyle faster using goggles. Frank bought Jeffrey a new pair of expensive goggles and timed Jeffrey for 15 25-yard freestyle swims. For the 15 swims, Jeffrey’s mean time was 16 seconds. Frank thought that the goggles helped Jeffrey to swim faster than the 16.43 seconds. Conduct a hypothesis test using a preset α = 0.05. Assume that the swim times for the 25-yard freestyle are normal A. Draw the normal curve to indicate what kind of test (one or two tailed) B. Null and Alternative Hypothesis C. Calculator or Desmos function used D. Test Statistic and P-Value E. Final conclusion that addresses the original claim. 

​In a working group, Nicole, shared that Beth made a rude co…

​In a working group, Nicole, shared that Beth made a rude comment under her breath. Nicole told Beth  it really upset her. Beth responded by telling Nicole she was being too sensitive. In a slightly raised voice, Nicole continued explaining why she was upset. Beth told Nicole to stop shouting and to calm down, which resulted in Nicole becoming even more frustrated. How should the group leader respond?