The manager of an online shop wants to determine whether the mean length of calling time of its customers is significantly more than 3 minutes. A random sample of 100 customers was taken. The average length of calling time in the sample was 3.
1 minutes with a standard deviation of 0.5 minutes. At a 0.05 level of significance, it can be concluded that the mean of the population is:A) significantly greater than 3.
B) not significantly greater than 3.
C) significantly less than 3.
D) not significantly different from 3.10.
Question 2
A car company is interested in testing to see whether the mean miles that a car engine will last without changing oil is the same or different depending on which brand of oil is used.
The engineers also wish to control for the type of transmission (manual or automatic) that is used. To conduct this test, the car company obtains enough engines so that all four oil brands can be tested in a design that involves no replication. Based on this information, how many engines will be needed to conduct the test?A) 4
B) 8
C) One for each oil type
D) One for each factor in the study
Transdermal patch administration: (b) patch immediately applied to clean, dry, hairless skin and lab
Analysis of a restriction fragment length Polymorphism
Environmental Systems in Space and Time
Insecticide application over time
Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body
Determine if each function is continuous, If the function is not continuous, find the x-axis