The pictogram shows information about the number of vinyi records sold in a shop on fionday and Tuesday.
a) How many records were sold on Monday?
(1)
b) How many records were sold on Tuesday?
(1)
On Wednesday and Thursday
a total of 32 records were sold.
Mon
The number of records sold on
Thursday was 3 times the number
Key: of records sold on Wednesday.
Tues
c) How many records were (2)
sold on Wednesday?
Wed
represents 8
vinyl records
d) How many records were (1)
sold on Thursday?
Thu
Total marks: 5

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to