Erikah is studying animal species in the northern part of North America. She is interested in the hibernation patterns of chipmunks. She observes 32 chipmunks in an enclosed wildlife area. She notes that the mean quantity of days that they stay in hibernation is 143 days with a standard deviation of 7.34 days. It isn't feasible for Erikah to observe to every chipmunk in the in the world. What can she use as her point estimate? The mean of her sample, x-bar = 143 days. The standard deviation of her sample, s= 7.34 days. The mean of the population, mu. The standard deviation of the population, sigma