## All Tasks

#### Interquartile range

Consider this sample:
$${45,47,49,50,52,55,57,60,63,65}$$
Now, find the interquartile range.

# Mean & median

Training

6

#### Negative Powers

This it's a multiple choise question.
Consider the power: $5^{-2}\;+\;7^{-3}$ . This Power can be represented in other way.
Choose the correct aswer.

# Powers

Training

8

#### Bad Students

Investigators did a test to find out the absolute frequency of how many students missed school in a week. There are 230 students.
Number of days: $${Day 1...Day 7}$$
Absolute frequency: $${0,6,7,4,1,3,2}$$
What is the relative frequency?
Please round to three decimal digits here.

# Absolute & relative frequency

Training

5

#### Natural Logarithm

Fill in the blank spots.

# Exponential properties

Learning

11

#### Exponential Function

The function $y=3^x$ is given. For what $x$ has the function the values $0.4$ and $1.4$?
Round to three decimal places.

# Exponential function

Training

11

#### Median of heights

Some students in a class measured their heights as displayed:
$${155,157,162,164,166,177,177}$$
What is the median?

# Probability

Learning

5