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A study of the ages of motorcyclists killed n crashes nvolves the random selection of 139...


A study of the ages of motorcyclists killed n crashes nvolves the random selection of 139 drivers with a mean or 3545 years. Assuming that。. 9 4 years, constuct and interpret a99% confidence interval estm ate of the mean age of ai motorcyclists kiled in crashes. Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table. what is the 99% confidence interval for the population mean μ? (Round to two decimal places as noeded) Notice that the confidence interval limits do not indlude ages below 20 years. What does this mean? OA. O B. The mean age of the sample will most likely not be less than 20 yoans old. The mean age of the population will most likely not be less than 20 years ofd C. Motorcyclists under the age of 20 never die in crashes. O D. The mean age of the population will never be less than 20 years old
A study of the ages of motorcyclists killed n crashes nvolves the random selection of 139 drivers with a mean or 3545 years. Assuming that。. 9 4 years, constuct and interpret a99% confidence interval estm ate of the mean age of ai motorcyclists kiled in crashes. Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table. what is the 99% confidence interval for the population mean μ? (Round to two decimal places as noeded) Notice that the confidence interval limits do not indlude ages below 20 years. What does this mean? OA. O B. The mean age of the sample will most likely not be less than 20 yoans old. The mean age of the population will most likely not be less than 20 years ofd C. Motorcyclists under the age of 20 never die in crashes. O D. The mean age of the population will never be less than 20 years old
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Giuem Sample sizen 139 A 9h cantidemie leve Level-of-significan les d:l-o.gg t o.01 critical-value.[Zu12:2.5741 using 2-table VI3g 139 E 2.05 The nie intenval foo the popula ticn meas 35.45-2.05くーく3545-t 2.05 133.40KM < 37.50 Notice that the Cenfiderme intemval imits ow 20 yeas includeC iwhat does this mead E The mean age of the populatio most like -not be less than 20years old

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