Mathematics, 24.09.2020 01:01, shealene7
Georgianna claims that in a small city renowned for its music school, the average child takes less than 5 years of piano lessons. We have a random sample of 20 children from the city, with a mean of 4.6 years of piano lessons and a standard deviation of 2.2 years. Construct a 95% confidence interval for the number of years students in this city take piano lessons, and interpret it in context of the data.
Answers: 1
Mathematics, 21.06.2019 15:30, juli8350
The average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction work force after he graduates in 2012. his friend tells him that average hourly earnings for construction workers will rise by 2% from 2009 to 2012. based on the data below, assuming that the projected hourly earnings are correct, is jason’s friend’s statement accurate? construction industry - average hourly earnings, 2000-2009 a. his friend’s statement is accurate. the average hourly earnings will increase by 2%. b. his friend’s statement is not accurate. the percent increase will be more than 2% c. his friend’s statement is not accurate. the percent increase will be less than 2% d. his friend’s statement is not accurate. the average hourly earnings will decrease
Answers: 3
Mathematics, 21.06.2019 23:00, Pankhud5574
Is a square always, sometimes, or never a parallelogram
Answers: 2
Georgianna claims that in a small city renowned for its music school, the average child takes less t...
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