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Business Statistics
1. The sample data from a research survey conducted in various cities on the amount of time 13-15 year-old children spent with mobiles are as follows:
City
Time with mobiles
(hours per week)
Hyderabad
46
Mumbai
50
Pune
46
Bangalore
54
Bhubneshwa
r
42
Indore
30
Bhopal
42
New Delhi
50
Chandigarh
46
For the above sample, determine the following measures: i. The mean ii. The standard deviation iii. The mode iv. The 75th percentile Based on your calculations comment on the time spent on mobile.
2. Mumbai Ice Cream an ice cream store gives relationship between ice cream sold and temperature. The store has taken a sample of a week s data. Below you are given the results of the sample
Day
Cones Sold
Temperature
1
350
110
2
200
100
3
210
90
4
100
80
5
80
70
6
70
60
7
50
50
i. Which variable is the dependent variable? ii. Compute the least squares estimated line. iii. Is there a significant relationship between the sales of cones and temperature? iv. Predict sales of a 95 degree day.
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