QUESTION 17 The local Chamber of Commerce would like to estimate the hourly wage for union workers in Bucks County, Pennsylvania with a margin of error of +-$1.40. Assume standard deviation for wages is $8.50. With a sample size of 45, how much confidence can we have in our results? Write your answer in percentage terms with two decimals.

Q: The standard deviation on your last test was 10. The average was a 70. The distribution had a normal…

A: To find out what percentage of the class scored between 60 and 80, we need to utilize the properties…

Q: Your instructor wishes to estimate the mean amount of time students spend studying math each…

A: Given that  Margin of error =E =2 Population standard deviation =12.7 95% confidence.

Q: Mensa is a society for "geniuses." One way to qualify for membership is having an 1Q at least 2.5…

A: To be qualified for membership is having an IQ at least 2.5 standard deviation above the mean.

Q: Scores on a recent NYS Standardized Exam were normally distributed with a mean of 77.6 and a…

A: Given: Mean = 77.6 Standard deviation = 4.3

Q: The data set has size 80. Approximately how many observations lie within two standard deviations to…

A: Empirical rule: On a normal distribution about 68% of data will be within one standard deviation of…