![subject](/tpl/images/cats/mat.png)
Mathematics, 05.07.2021 19:20 shonherron
A random sample of 30 households was selected as part of a study on electricity usage, and the number of kilowatt-hours (kWh) was recorded for each household in the sample for the March quarter of 2006. The average usage was found to be 375kWh. It is believed that the standard deviation from the population has changed and thus is unknown. However, from the small data set in 2006, we know the sample standard deviation is 91.5kWh. Assuming that the usage is normally distributed, provide an expression for calculating a 98% confidence interval for the mean usage in the March quarter of 2006.
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 13:30
The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 17:50
The length and width of a rectangle are consecutive even integers the area of the rectangle is 120 squares units what are the length and width of the rectangle
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:10
What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:30
Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?
Answers: 1
You know the right answer?
A random sample of 30 households was selected as part of a study on electricity usage, and the numbe...
Questions
![question](/tpl/images/cats/health.png)
Medicine, 28.10.2020 14:00
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.10.2020 14:00
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 28.10.2020 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 14:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 14:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.10.2020 14:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
English, 28.10.2020 14:00
![question](/tpl/images/cats/en.png)
English, 28.10.2020 14:00
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/fr.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 14:00