Friday, April 30, 2010
Extras
As for extra benefits provided, 9.5 percent of respondents indicated providing their nanny use of a credit or gas card. 12 percent of respondents indicated providing healthcare for their nannies. 24 percent indicated providing access to a car. Other benefits listed include: cell phone, annual bonus, and spending money for daily activities.
Full time vs part time
73 percent of respondents indicated that their nanny worked full time (35 hours or week or more). The average hourly rate for full time nannies was $16.13 while the average hourly rate for part time was $19. The average weekly salary for part time nannies was $386 and for full time nannies it was $695.
Thursday, April 22, 2010
Hourly Mode = 15
The mode on the nanny salary survey = $ 15 per hour. (n = 7)
Other runner's up for the mode were:
$13 per hour (n = 6)
$17 per hour (n = 4)
$18 per hour (n = 4)
We calculated the rate for the mode analysis by using normal statistical methods. That is a hourly rate of $14.50 was rounded up to 15, and an hourly rate of $15.30 was considered 15. The mode is the most common salary, the salary that appears the most is the mode.
Other runner's up for the mode were:
$13 per hour (n = 6)
$17 per hour (n = 4)
$18 per hour (n = 4)
We calculated the rate for the mode analysis by using normal statistical methods. That is a hourly rate of $14.50 was rounded up to 15, and an hourly rate of $15.30 was considered 15. The mode is the most common salary, the salary that appears the most is the mode.
Alexandria is not so different after all
As mentioned, the average hourly rate for nannies in the DC region was $16.28 in a recent national survey of nanny salaries and benefits. As it turns out, this is a pretty good reflection of the situation here in Alexandria.
Based on the responses to the Alexandria Nanny Survey, the average nanny hourly rate in Alexandria is $16.97.
The median salary is $16.00 per hour.
Based on the responses to the Alexandria Nanny Survey, the average nanny hourly rate in Alexandria is $16.97.
The median salary is $16.00 per hour.
A note on statistical methods in the survey
There were 46 responses to the survey but most of the ensuing analysis that will be posted here relies on a sample size of 42 surveys.
Most statistical calculations that we will post in the future exclude two high outlier survey responses. We decided these two outliers must be excluded but wanted to disclose their exclusion. Including the outliers when presenting median salary data may still yield a robust estimate. But we nevertheless exclude the two outliers at the high end of the hourly rate even in calculating the median hourly rate, as compared to the mean.
We exclude the high pair for three reasons. First and most importantly, the two high outliers were flagged as coming from identical computer DNS numbers. The DNS is a unique identifier that can track the source of the survey response. They were also submitted in close proximity in time. Thus, there is an inference that the two high outliers are not credible responses.
Second, these two high responses were not identical but were similar in other ways. Had they been identical, they would have been more credible. For example they may have been mistakenly submitted twice by accident. Instead, they both contained extremely high pay rates with rather low work loads. They simply bore no resemblance to any other survey responses, except each other. Combined with the fact they came from the same DNS number, their credibility is eroded further.
Third, the two high outliers were outlandish. They would result in an annual salary in excess of $100,000 per year. These responses were many many standard deviations away from the mean, and thus the characterization as an outlier is statistically sound. Exclusion is one appropriate statistical method to mange outliers, especially considering how many standard deviations away they were from the mean. Simply put, no other survey responses were even close to this pair. While we could alternatively manage these two high outliers through a frequency distribution to mitigate the extreme number of standard deviations from the mean, their origin from an identical DNS computer number calls into question their underlying good faith. Surveymonkey is supposed to block repeated attempts to game the survey. But it was successful in flagging the identical DNS numbers.
This transparent description of how the two high outliers were excluded of course allows any reader who wishes to disregard the evidence of bad faith in these two survey responses to simply consider the pair of high outliers part of the survey for their own purposes. But we will not taint the calculations with a pair of responses that are excluded on sound statistical principles.
On the other hand, if you are the person who submitted one (or both) of these outlier responses, and would like to discuss including them, email us at rosemontnanny@yahoo.com. The pair of postings were made on Monday April 19 at 4:41 and 4:50 pm.
There were also two live in nanny responses. Some aspects of these responses will be excluded, such as calculation of mean and median and other numbers. But these live in responses will still be included in other data points. Stay tuned for mode. We will also be posting a wide variety of statistics, such as cross-tabs on mean and median salary broken down by experience levels.
Most statistical calculations that we will post in the future exclude two high outlier survey responses. We decided these two outliers must be excluded but wanted to disclose their exclusion. Including the outliers when presenting median salary data may still yield a robust estimate. But we nevertheless exclude the two outliers at the high end of the hourly rate even in calculating the median hourly rate, as compared to the mean.
We exclude the high pair for three reasons. First and most importantly, the two high outliers were flagged as coming from identical computer DNS numbers. The DNS is a unique identifier that can track the source of the survey response. They were also submitted in close proximity in time. Thus, there is an inference that the two high outliers are not credible responses.
Second, these two high responses were not identical but were similar in other ways. Had they been identical, they would have been more credible. For example they may have been mistakenly submitted twice by accident. Instead, they both contained extremely high pay rates with rather low work loads. They simply bore no resemblance to any other survey responses, except each other. Combined with the fact they came from the same DNS number, their credibility is eroded further.
Third, the two high outliers were outlandish. They would result in an annual salary in excess of $100,000 per year. These responses were many many standard deviations away from the mean, and thus the characterization as an outlier is statistically sound. Exclusion is one appropriate statistical method to mange outliers, especially considering how many standard deviations away they were from the mean. Simply put, no other survey responses were even close to this pair. While we could alternatively manage these two high outliers through a frequency distribution to mitigate the extreme number of standard deviations from the mean, their origin from an identical DNS computer number calls into question their underlying good faith. Surveymonkey is supposed to block repeated attempts to game the survey. But it was successful in flagging the identical DNS numbers.
This transparent description of how the two high outliers were excluded of course allows any reader who wishes to disregard the evidence of bad faith in these two survey responses to simply consider the pair of high outliers part of the survey for their own purposes. But we will not taint the calculations with a pair of responses that are excluded on sound statistical principles.
On the other hand, if you are the person who submitted one (or both) of these outlier responses, and would like to discuss including them, email us at rosemontnanny@yahoo.com. The pair of postings were made on Monday April 19 at 4:41 and 4:50 pm.
There were also two live in nanny responses. Some aspects of these responses will be excluded, such as calculation of mean and median and other numbers. But these live in responses will still be included in other data points. Stay tuned for mode. We will also be posting a wide variety of statistics, such as cross-tabs on mean and median salary broken down by experience levels.
Wednesday, April 21, 2010
Survey Has Closed
The Rosemont Nanny Data Survey has closed. The survey was open for 3 days. The response was incredible. The survey was completed by 46 Alexandria families who employ nannies. Soon for the first time, Rosemont and Alexandria specific data on what nannies actually make here will be available to parents and future employers.
The survey gathered a wide variety of data regarding nanny pay and compensation. It marks the first Alexandria-specific survey of child-care employers that has been conducted. Never before could parents turn to actual data in deciding what to pay nanny applicants. As a result, anecdotes, rumors and chance may have played a bigger role in setting nanny salaries than empirical facts.
Over the next several days, this page will post a variety of data, including average salary, compensation, median salary, average salary by neighborhood, the extent of fringe benefits, hours worked, experience, pay by experience, average hourly rates, median hourly rates, and more. Please be patient as we compile and process all of the data and make individual postings on a wide range of topics.
The survey gathered a wide variety of data regarding nanny pay and compensation. It marks the first Alexandria-specific survey of child-care employers that has been conducted. Never before could parents turn to actual data in deciding what to pay nanny applicants. As a result, anecdotes, rumors and chance may have played a bigger role in setting nanny salaries than empirical facts.
Over the next several days, this page will post a variety of data, including average salary, compensation, median salary, average salary by neighborhood, the extent of fringe benefits, hours worked, experience, pay by experience, average hourly rates, median hourly rates, and more. Please be patient as we compile and process all of the data and make individual postings on a wide range of topics.
Tuesday, April 20, 2010
Rosemont Nanny Salary Data Coming Soon
The survey of Rosemont/Alexandria Salary data is going great. We have received many many detailed responses and will be compiling the data over the next few days and reporting the results here. Book mark this site for regular updates as we will post data reports intermittently.
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