An experiment involves selecting a random sample of 256 middle managers. One item of interest is their mean annual income. The sample mean is computed to be $35,420 and the sample standard deviation is $2,050. What is the standard error of the mean?
Question 191 out of 1 pointsThe wildlife department has been feeding a special food to rainbow trout fingerlings in a pond. A sample of the weights of 40 trout revealed that the mean weight is 402.7 grams and the standard deviation 8.8 grams. What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
Question 201 out of 1 pointsThe Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a person would score 130 or more on the test?
Chapter 9 Question 1A point estimate is a single value used to estimate a population parameter. 1 out of 1 points
Question 21 out of 1 pointsAn interval estimate is a single value used to estimate a population parameter.