# Out of 1 points an experiment involves selecting a

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Question 181 out of 1 points
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.
Question 31 out of 1 pointsA sample of 2000 union members was selected and their opinions regarding a proposed management union contract were recorded. 1,600 members were in favor of it. A 95% confidence interval for the population proportion was computed to be 0.78 and 0.82. This indicates that about 80 out of 100 similarly constructed intervals would include the population proportion.
Question 41 out of 1 pointsIf the size of a sample equals the size of the population, we would not expect any sampling error in estimating the population parameter.
Question 51 out of 1 pointsWe can expect some difference between sample statistics and the corresponding population parameters. This difference is called the sampling error.
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