http://lib.stat.cmu.edu/DASL/Stories/IceCreamConsumption.html

Datafile Name: Ice Cream
Datafile Subjects: Consumer
Story Names: Ice Cream Consumption
Reference: Koteswara Rao Kadiyala (1970) Testing for the independence of
regression disturbances. Econometrica, 38, 97-117. Also found in: Hand,
D.J., et al. (1994) A Handbook of Small Data Sets, London: Chapman & Hall,
214.
Authorization: Contact Author
Description: Ice cream consumption was measured over 30 four-week periods
from March 18, 1951 to July 11, 1953. The purpose of the study was to
determine if ice cream consumption depends on the variables price, income,
or temperature. The variables Lag-temp and Year have been added to the
original data.
Number of cases: 30
Variable Names:

  1. Date: Time period (1-30) of the study (from 3/18/51 to 7/11/53)
  2. IC: Ice cream consumption in pints per capita
  3. Price: Price of ice cream per pint in dollars
  4. Income: Weekly family income in dollars
  5. Temp: Mean temperature in degrees F.
  6. Lag-temp: Temp variable lagged by one time period
  7. Year: Year within the study (0 = 1951, 1 = 1952, 2 = 1953)

The Data:

date    IC      price   income  temp    Lag-temp        Year
1       .386    .270    78      41      56      0
2       .374    .282    79      56      63      0
3       .393    .277    81      63      68      0
4       .425    .280    80      68      69      0
5       .406    .272    76      69      65      0
6       .344    .262    78      65      61      0
7       .327    .275    82      61      47      0
8       .288    .267    79      47      32      0
9       .269    .265    76      32      24      0
10      .256    .277    79      24      28      0
11      .286    .282    82      28      26      1
12      .298    .270    85      26      32      1
13      .329    .272    86      32      40      1
14      .318    .287    83      40      55      1
15      .381    .277    84      55      63      1
16      .381    .287    82      63      72      1
17      .470    .280    80      72      72      1
18      .443    .277    78      72      67      1
19      .386    .277    84      67      60      1
20      .342    .277    86      60      44      1
21      .319    .292    85      44      40      1
22      .307    .287    87      40      32      1
23      .284    .277    94      32      27      1
24      .326    .285    92      27      28      2
25      .309    .282    95      28      33      2
26      .359    .265    96      33      41      2
27      .376    .265    94      41      52      2
28      .416    .265    96      52      64      2
29      .437    .268    91      64      71      2
30      .548    .260    90      71      ¥       2