We use a z rather than a t test when: A) The population mean is known
B)The population standard deviation is known
C) Neither the population mean or standard deviation are known

*i will mark you brainliest plus 10 free points * which of the following is not a basic defensive driving skill? a. a solid grasp on the instruments and controls at your disposal. b. the pre-drive procedures and adjustments to your ride. c. scanning for hazards and adequate space management. d. the post-drive procedures and adjustments during your ride. e. all of the above

Compare and contrast the two settlements (dhaka, bangladesh and the favela outside of rio de janeiro, brazil). consider political, social, economic, and environmental issues.

This is science by the way which of the following is an example of an environmental pressure a. the air pressure in the atmosphere b. a lake that is gradually running out of water c. a fight between two members of the same species d. breeding between two members of the same species