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
Primates exhibit prolonged life histories, spending more time in each stage of life than most other
The Genus Homo Through Time
A clock is showing the time as exactly 3:00 p.m. and 25 s.
Use the information in the above table to establish a Born-Haber cycle to determine the ...
A simple pendulum of length 2.5 m m makes 5.0 complete swings in 16 s s . What is the ...
Nitin earns $48,000 per year. Determine his gross earnings for each pay period if he is paid ...