Statistics and probability

Suppose the KittyCat brand of litter products manufactures 5 1b bags of litter. Lisa, a cat owner, believes that these bags contain less than 5 1b of litter. She collects data on a randomly selected sample of 60 KittyCat 5 1b litter bags and decides to use a hypothesis test to determine whether the mean weight is less than 5 1b. Lisa believes that the weight of all such bags of litter is normally distributed, but she does not know the population standard deviation. new 6 Which of the following hypothesis tests should Lisa use regarding her claim? Q one-sample, right-tailed z-test for a mean one-sample, right-tailed f-test for a mean one-sample, left-tailed z-test for a mean O one-sample, left-tailed /-test for a mean O one-sample, two-tailed f-test for a mean