"D" Size Batteries Produced by MNM Corporation Have Had a Life

question 62

Essay

"D" size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because of an improved production process, it is believed that there has been an increase in the life expectancy of its "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. Assume from past information that it is known that the standard deviation of the population is 9 hours.
a.Formulate the hypotheses for this problem.
b.Compute the test statistic.
c.What is the p-value associated with the sample results? What is your conclusion based on the p-value? Let $\alpha$ = .05.

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Definitions:

Piaget, Vygotsky

Refer to Jean Piaget and Lev Vygotsky, two influential theorists in developmental psychology, known for their work on cognitive development and socio-cultural theory respectively.

Egocentric Speech

Speech that is focused on the self, often observed in young children, reflecting their limited ability to take the perspective of others.

True Dialogue

Genuine, open exchange of ideas and thoughts where participants actively listen and respond to each other with respect and understanding.

Conversational Partners

Individuals engaged in verbal interaction, where they exchange ideas, information, or feelings through spoken words.