Researchers determined that 60 tissues is the mean number of

Researchers determined that 60 tissues is the mean number of tissues used during a cold. Suppose a random sample of 400 Kleenex users yielded the following data on the number of tissues used during a cold: X=53, S = 21. Using the sample information provided, calculate the value of the test statistic. Question 5 options: 1) t = (53 – 60)/(21/400) 2) t = (53 – 60)/(21/1604) 3) t = (53 – 60)/(21/20) 4) t = (53 – 60)/21

Solution

T = ( xbar - miu ) / [sigma /srqt(n) ]

T = ( 53 - 60 ) / [ 21 / srqt400 ]

T = ( 53-60) / 21/20