Standard deviation for ungrouped data - Assessement
Authored by Geoffrey Lufanana
Mathematics
10th Grade
Used 5+ times
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14 questions
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1.
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1 min • 3 pts
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.
2.
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1 min • 3 pts
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.
3.
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1 min • 3 pts
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.
4.
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1 min • 3 pts
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.
5.
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1 min • 2 pts
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.
6.
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1 min • 4 pts
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.
7.
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1 min • 3 pts
The mean of the numbers 23, 18, 26, 35, 48, 55 and y is 35.
Find the value of y.
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