Roberto wants to buy a $40 gift for his father. He finished one odd job in 4 hours at $3.75 an hour. He is now working at a job
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Answer:
MAD of her data set is 4.
Step-by-step explanation:
Vivian surveyed bicyclists in her community to see the average number of miles they biked per day.
The data set is given below :
7, 10, 13, 4, 12, 21, 10, 3
= 10
Data point Distance from mean
1 7 7 - 10 = | -3 | = 3
2. 10 10 - 10 = | 0 | = 0
3. 13 13 - 10 = | 3 | = 3
4. 4 4 - 10 = | -6 | = 6
5. 12 12 - 10 = | 2 | = 2
6. 21 21 - 10 = | 11 | = 11
7. 10 10 - 10 = | 0 | = 0
8. 3 3 - 10 = | -7 | = 7
Adding the distance = 3 + 0 + 3 + 6 + 2 + 11 + 0 + 7 = 32
MAD = = 4
MAD of her data set is 4.
Mean Absolute Deviation of this data tells about the variation of 4 miles biked each day by the bicyclists.
Answer: 2.845
Step-by-step explanation:
The formula to find the standard deviation is given by :-
, where p is the probability of getting success in each trial and n is the sample size.
Given : Sample size : n=110
The proportion of employees older than 55 and considering retirement : p=0.08
Then, the standard deviation is given by :-
Hence, the standard deviation for the sampling distribution of the sample proportions is 2.845.