Examlex
A new light bulb is being considered for use in an office It is decided that the new bulb will be used only if it has a mean lifetime of more than 500 hours. A random sample of 40 bulbs is selected and placed on life test. The mean and standard deviation are found to be 505 hours and 18 hours, respectively. Perform the appropriate test of hypothesis to determine whether the new bulb should be used. Use a 0.01 level of significance.
Imitation
The social process through which children learn to use their culture’s resources by observing and copying the behaviors of others.
Sentences
Sentences are structured groups of words that express clear statements, questions, commands, or exclamations, serving as the basic building blocks of language and communication.
Protodeclarative
A form of pointing or showing by infants, used to direct the attention of others to objects or events, serving a declarative communicative function.
Conversational
Relating to or characteristic of informal spoken exchange or dialogue.
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