READY SIGNAL CONTROL DATA

CPI: Medical Care Commodities in U.S. City Average

Why Use This Data Source In Your Models?

CPI: Medical Care Commodities in U.S. City Average

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Suggested Treatment:

The data shows auto correlation and a non-normal distribution. The data should be differenced. While the Order Norm transformation, provides the best normality, the Boxcox variable will also perform well.

Grain Transformation:

Data is unable to be distributed by time or geography. The roll up method used is Weighted Average.

Source:
U.S. Bureau of Labor Statistics

Release:
Consumer Price Index

Units:
Index 1982-1984=100, Not Seasonally Adjusted

Frequency:
Monthly

Available Through:
10/31/2024

Suggested Treatment:

The data shows auto correlation and a non-normal distribution. The data should be differenced. While the Order Norm transformation, provides the best normality, the Boxcox variable will also perform well.

Grain Transformation:

Data is unable to be distributed by time or geography. The roll up method used is Weighted Average.

Auto Correlation Analysis:

Data shows auto correlation indicating a need for differencing

The ACF indicates 1 order differencing is appropriate.

Further differencing is reccommended

Trend Analysis:

The Kwiatkowski-Phillips-Schmidt-Shin (KPSS) test, KPSS Trend = 0.40 p-value = 0.01 indicates that the data is not stationary.

Distribution Analysis:

The Shapiro-Wilk test returned W = 0.93 with a p-value =0.00 indicating the data does not follow a normal distribution.

A skewness score of -0.23 indicates the data are fairly symmetrical.

Hartigan's dip test score of 0.05 with a p-value of 0.00 inidcates the data is multimodal

Statistics (Pearson P/ df, lower => more normal)

No transform
6.65
Box-cox
6.37
Log_b(x-a)
7.03
sqrt(x+a)
7.37
exp(x)
12.50
arcsinh(x)
7.03
Yeo-Johnson
6.77
OrderNorm
0.00

Auto Correlation Function

Auto Correlation Function After Differencing

Partial Auto Correlation Function

Seasonal Impact

Seasonal and Trend Decompostion


Citation:

U.S. Bureau of Labor Statistics, Consumer Price Index for All Urban Consumers: Medical Care Commodities in U.S. City Average [CUSR0000SAM1], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CUSR0000SAM1, May 3, 2024.

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