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17. 18. According to a report, the mean of monthly cell phone bills was $49.58 in 2017. A researcher suspects that the mean of monthly cell phone bills is differenm (at State the null and alternative hypotheses in words. (b) State the null and alternative hypotheses symbolically. (ct Explain what it would mean to make a Type I error. (d) Explain what it would mean to make a Type II error. (at State the null hypothesis in words. Choose the correct answer below. 0 A. The mean of monthly cell phone bills is less than $49.58. 0 B. The mean of monthly cell phone bills is greater than $49.58. 0 C. The mean of monthly cell phone bills is different from $49.58. 0 D. The mean of monthly cell phone bills is $49.58. State the alternative hypothesis in words. Choose the correct answer below. 0 A. The mean of monthly cell phone bills is $49.58. 0 B. The mean of monthly cell phone bills is less than $49.58. 0 C. The mean of monthly cell phone bills is different from $49.58. 0 D. The mean of monthly cell phone bills is greater than $49.58. (b) State the hypotheses symbolically. Ho: (1) (2>$|:| H1= $l:| (Type integers or decimals. Do not round.) {ct What would it mean to make a Type I error! 0 A. The sample evidence did not lead the researcher to believe the mean of monthly cell phone bills is different from $49.58 when, in fact, the mean of bills is different from $49.58. 0 B. The sample evidence led the researcher to believe the mean of monthly cell phone bills is higher than $49.58 when. in fact, the mean of bills is $49.58. 0 C. The sample evidence did not lead the researcher to believe the mean of monthly cell phone bills is higher than $49.58 when, in fact, the mean of bills is higher than $49.58. 0 D. The sample evidence led the researcher to believe the mean of monthly cell phone bills is different from $49.58 when, in fact, the mean of bills is $49.58. (d) What would mean to make a Type II error? 0 A. The sample evidence led the researcher to believe the mean of monthly cell phone bills is different from $49.58 when. intact. the mean of bills is different from $49.58. 0 B. The sample evidence did not lead the researcher to believe the mean of monthly cell phone bills is higher than $49.58 when, in fact, the mean of bills is higher than $49.58. 0 C. The sample evidence did not lead the researcher to believe the mean of monthly cell phone bills is different from $49.58 when. in fact. the mean of bills is different from $49.58. 0 D. The sample evidence led the researcher to believe the mean of monthly cell phone bills is different from $49.58 when. intact. the mean of bills is $49.58. (110:] (2)0' (3)0ll t4)O 06 O> Oil 0% Op 0% O
