The average height of students in a freshman class of a certain school has been 168.67 cm with a population standard deviation of 8.67 cm. Is there a reason to believe that there has been a change in the average height if a random sample of 49 students in the present freshman class has an average height of 155.04 cm? Use a 0.1 level of significance. What are the given? Write only the number. : population mean:____ cm population standard deviation:____ cm sample size:____ sample mean:____ cm level of significance:____ What are the critical values? Write the positive critical value first then the negative. z:____ and ____ What is the value of the calculated z? Round your answer to the nearest hundredths.
The average height of students in a freshman class of a certain school has been 168.67 cm with a population standard deviation of 8.67 cm. Is there a reason to believe that there has been a change in the average height if a random sample of 49 students in the present freshman class has an average height of 155.04 cm? Use a 0.1 level of significance.
What are the given? Write only the number. :
population mean:____ cm
population standard deviation:____ cm
sample mean:____ cm
level of significance:____
What are the critical values? Write the positive critical value first then the negative.
z:____ and ____
What is the value of the calculated z? Round your answer to the nearest hundredths.
z:____
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