4. It has been accepted that 40% or less of households changed their driving habitsbecause of escalating gas prices. However, a popular energy company challenges thatless than 40% of households have changed their driving habits because of escalatinggas prices.Their recent survey of 180 households finds that 70 households have made lifestylechanges due to escalating gas prices. (hint: first calculate the sample proportion)At a 10% level of significance, test the energy company's challenge.H₂:Ha: p < 0.40____crit =___stat =Decision:α =pvalue =tail 6. A university wants to promote the graduates of its honors program. At present it isstated that the GPA of the graduates is 3.5 or below. The university wants to prove ata 90% confidence that the mean GPA of these graduates is greater than 3.5. A sampleof 25 university honors program students is taken and is found to have a mean GPAequal to 3.6. The sample standard deviation is 0.40.H₂:H₂:_crit =_stat =Decision:tailα =pvalue=

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4. It has been accepted that 40% or less of households changed their driving habits because of escalating gas prices. However, a popular energy company challenges that less than 40% of households have changed their driving habits because of escalating gas prices. Their recent survey of 180 households finds that 70 households have made lifestyle changes due to escalating gas prices. (hint: first calculate the sample proportion) At a 10% level of significance, test the energy company's challenge. Ho: Ha: p < 0.40 _crit = __stat = Decision: α = pvalue= tail

4. It has been accepted that 40% or less of households changed their driving habits because of escalating gas prices. However, a popular energy company challenges that less than 40% of households have changed their driving habits because of escalating gas prices. Their recent survey of 180 households finds that 70 households have made lifestyle changes due to escalating gas prices. (hint: first calculate the sample proportion) At a 10% level of significance, test the energy company's challenge. Ho: Ha: p < 0.40 _crit = __stat = Decision: α = pvalue= tail

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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