Standard deviation for ungrouped data - Assessement

A survey recorded the number of passengers in each car that entered the car park of a hotel on a certain day. The results are in the attached image.

The mean number of passengers in a car is 3.
Find the value of k.

A survey recorded the number of passengers in each car that entered the car park of a hotel on a certain day. The results are in the attached image.

The mean number of passengers in a car is 3.
Find the standard deviation of the number of passengers in a car.

Give your answer to 3 significant figures.

The following table shows the number of Internet purchases made by 50 people in a month.

The mean number of purchases is 2.2.
Find the values of a.

The following table shows the number of Internet purchases made by 50 people in a month.

The mean number of purchases is 2.2.
Find the values of b.

The following table shows the number of Internet purchases made by 50 people in a month.

Find the median number of purchases made by a person.

The following table shows the number of Internet purchases made by 50 people in a month.

Calculate the standard deviation of the data.
Give your answer to 1 decimal place.

The mean of the numbers 23, 18, 26, 35, 48, 55 and y is 35.

Find the value of y.

The mean of the numbers 23, 18, 26, 35, 48, 55 and y is 35.

determine the median of the numbers.

The mean of the numbers 23, 18, 26, 35, 48, 55 and y is 35.

Find the standard deviation of the numbers.

Give your answer to 3 significant figures

A set of 24 numbers is listed in the image.

10,30,40,10,50,30,30,20,50,20,40,20,50,20,40,30,20,10,20,30,20,20,30,30

Create a frequency table