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According to a report the standard deviation of monthly cell phone bills was 49 24 three years ago A researcher suspects that the standard deviation of monthly cell phone bills is less today a Determine the null and alternative hypotheses b Explain what it would mean to make a Type I error c Explain what it would mean to make a Type II error a State the hypotheses Ho o 49 24 H o 49 24 Type integers or decimals Do not round b Explain what it would mean to make a Type I error Choose the correct answer below O A The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is different from 49 24 when in fact the standard deviation of the bill is different from 49 24 OB The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is different from 49 24 when in fact the standard deviation of the bill is 49 24 OC The sample evidence led the researcher to believe the standard deviation of the monthly cell phone bill is less than 49 24 when in fact the standard deviation of the bill is 49 24 O D The sample evidence did not lead the researcher to believe the standard deviation of the monthly cell phone bill is less than 49 24 when in fact the standard deviation of the bill is less than 49 24

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