Syy

= ∑y2

(∑y)2

 

– ---------------

 

 

 

n

 

Sxy

 

∑x1

• ∑y

= ∑(x–1)y– -------------------------

 

 

 

n

ˆ

B

 

 

x =

-----------

 

 

 

y – A

 

 

ˆ

B

 

 

y =

A + --

 

 

 

x

 

 

Comparison Regression Curves

The following example uses the data input in as following table:

x

y

x

y

1.0

1.0

2.1

1.5

1.2

1.1

2.4

1.6

1.5

1.2

2.5

1.7

1.6

1.3

2.7

1.8

1.9

1.4

3.0

2.0

Compare the correlation coefficient for logarithmic, e exponential, ab exponential, Power, and inverse regression.

(STAT) (Type)

(InX) (STAT)

(Reg) (r)

(STAT) (Type)

(e^X) (STAT)

(Reg) (r)

(STAT) (Type)

(A⋅B^X) (STAT)

(Reg) (r)

(STAT) (Type)

(A⋅B^X) (STAT)

(Reg) (r)

60

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Image 66
HP 300s+ Scientific manual ∑ x, Comparison Regression Curves
Page 65 Page 67

300s+ Scientific specifications

The HP 300s+ Scientific Calculator is a versatile and compact tool designed for students, educators, and professionals in various fields that require mathematical computations. This calculator stands out for its feature-rich design that caters to a broad audience, from high school mathematics to advanced college courses.

One of the main features of the HP 300s+ is its extensive range of functions, which includes over 300 built-in mathematical and scientific functions. Users can seamlessly perform calculations in algebra, calculus, statistics, and trigonometry. The device includes a comprehensive set of functions for solving equations, working with fractions, and performing permutations and combinations, making it suitable for a variety of academic disciplines.

The HP 300s+ utilizes a large, easy-to-read LCD display that enhances the user experience by clearly showing calculations and results. This display supports multi-line input and output, allowing users to view and edit complex expressions easily. The calculator also includes a user-friendly interface, with clearly labeled keys that facilitate quick access to frequently used functions.

In addition to standard calculations, the HP 300s+ boasts features such as memory functions, allowing users to store and recall numerical values for use in multiple calculations. This is particularly useful for tasks that involve repetitive computations, as it saves time and reduces the likelihood of errors.

Power efficiency is another hallmark of the HP 300s+. It operates on a combination of solar power and battery, ensuring a long lifespan and reliability. This makes it an eco-friendly option that aligns with the modern need for sustainable technology solutions.

Notably, the HP 300s+ is designed with portability in mind, featuring a lightweight and slim profile that makes it easy to carry in backpacks or briefcases. Its durable construction ensures that it can withstand everyday rough use, making it ideal for classroom environments or fieldwork.

Overall, the HP 300s+ Scientific Calculator is a feature-rich and reliable tool that meets the diverse mathematical needs of its users. With its advanced functionalities, user-friendly design, and robust construction, it continues to be a preferred choice for students and professionals alike seeking an efficient solution for scientific calculations.
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