AQA GCSE Statistics The normal distribution and index numbers overview quiz quiz

$95\%$

$68\%$

$99.7\%$

$50\%$

$40$ to $60$

$45$ to $55$

$35$ to $65$

$48$ to $52$

$1$

$10$

$2$

$0.5$

The student with $0.8$

They performed equally

It cannot be compared

The student with $1.2$

$35\%$

$135\%$

$65\%$

$13.5\%$

$110$

$125$

$80$

$10$

The total amount of money spent by one single household over the whole of the year

The total profit made by all of the retailers across the country

The average change in the price of a basket of goods and services (inflation)

The total number of separate items sold by shops each year

Spread out across the curve

In the right-hand tail

At the two ends

All at the centre

The value is below the mean

The value is above the mean

The value equals the mean

The standard deviation is negative

It always increases the marks that each and every student is awarded on a test

It removes the original scale by using each test's own mean and spread

It converts all of the raw marks straight into simple percentages

It ignores the standard deviation and only uses the mean of each test

It has risen by $92\%$

It has risen by $8\%$

It has fallen by $8\%$

It is unchanged

$25\%$

$68\%$

$95\%$

$50\%$