![subject](/tpl/images/cats/mat.png)
Mathematics, 11.02.2021 17:50 Alisewilcox
Calculate the sample mean and sample variance for the following frequency distribution of heart rates for a sample of American adults. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Heart Rates in Beats per Minute Class Frequency 51 - 58 6 59 - 66 3 67 - 74 11 75 - 82 13 83 - 90 4
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/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 15:30
The function Ζ is defined by Ζ(x) = (x + 3)(x + 1). the graph of Ζ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of Ζ?
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30
The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30
The length of a field is 100 yards and its width is 75 yards. if 1 inch represents 25 yards, what would be the dimensions of the field drawn on a sheet of paper?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:00
Which of the following scenarios demonstrates an exponential decay
Answers: 1
You know the right answer?
Calculate the sample mean and sample variance for the following frequency distribution of heart rate...
Questions
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 03.10.2019 09:30
![question](/tpl/images/cats/himiya.png)
Chemistry, 03.10.2019 09:30
![question](/tpl/images/cats/mat.png)
Mathematics, 03.10.2019 09:30
![question](/tpl/images/cats/mat.png)
Mathematics, 03.10.2019 09:30
![question](/tpl/images/cats/en.png)
English, 03.10.2019 09:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 03.10.2019 09:30
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 03.10.2019 09:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 03.10.2019 09:30
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/istoriya.png)
History, 03.10.2019 09:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 03.10.2019 09:30
![question](/tpl/images/cats/istoriya.png)
History, 03.10.2019 09:30
![question](/tpl/images/cats/mat.png)