Q1) Rideshare services are available internationally where a customer uses a smartphone app to request a ride. Then, a d
Posted: Thu Jul 14, 2022 4:53 pm
Q1) Rideshare services are available internationally where acustomer uses a smartphone app to request a ride. Then, a driverreceives the request, picks up the customer, and takes the customerto the desired location. No cash is involved; the payment for thetransaction is handled digitally. Suppose the weekly income ofrideshare drivers follows the normal probability distribution witha mean of $2,000 and a standard deviation of $200. What is the zvalue and the probability of income for a driver who earns $1,100per week? For a driver who earns $900 per week? (20 marks)
Q2) Gibbs Baby Food Company wishes to compare the weight gain ofinfants using its brand versus its competitor’s. A sample of 60babies using the Gibbs products revealed a mean weight gain of 7.6pounds in the first 3 months after birth. For the Gibbs brand, thepopulation standard deviation of the sample is 2.3 pounds. A sampleof 55 babies using the competitor’s brand revealed a mean increasein weight of 8.1 pounds. The population standard deviation is 2.9pounds. At the 0.05 significance level, can we conclude that babiesusing the Gibbs brand gained same weight? Conduct the hypothesistest and write the conclusion.
Q2) Gibbs Baby Food Company wishes to compare the weight gain ofinfants using its brand versus its competitor’s. A sample of 60babies using the Gibbs products revealed a mean weight gain of 7.6pounds in the first 3 months after birth. For the Gibbs brand, thepopulation standard deviation of the sample is 2.3 pounds. A sampleof 55 babies using the competitor’s brand revealed a mean increasein weight of 8.1 pounds. The population standard deviation is 2.9pounds. At the 0.05 significance level, can we conclude that babiesusing the Gibbs brand gained same weight? Conduct the hypothesistest and write the conclusion.