Question

In: Statistics and Probability

Nationally, social workers average 10.2 years of experience. In a random sample of 203 social workers...

Nationally, social workers average 10.2 years of experience. In a random sample of 203 social workers in Houston metropolitan area average only 9.5 years with a standard deviation of 0.52.

Are social workers in Houston significantly less experienced? Use α=.05 level

Calculate the ES (effect size) and indicate if it is strong, moderate, or weak.

Solutions

Expert Solution


orchestra answered 1 year ago
Next > < Previous

Related Solutions

Urban planners in Melbourne average 10.2 years’ experience. We know this from a Census of urban...
Urban planners in Melbourne average 10.2 years’ experience. We know this from a Census of urban planners, but the raw data was lost, so we cannot use the data to compute σ. What an inconvenience!    (a) In a random sample of 65 urban planners in Melbourne’s growth areas, the average was 8.7 years with a standard deviation of 0.52. Are growth-areas planners significantly less experienced than the metropolitan average? Presume alpha = 0.05 (b) The same sample of urban...
A random sample of 25 workers showed that the average workweek in the United States is...
A random sample of 25 workers showed that the average workweek in the United States is down to only 35 hours, largely because of a rise in part-time workers. The variance of the sample was 18.49 hours. Assuming that the population is normally distributed, calculate a 98% confidence interval for the population standard deviation.
1. A random sample of 100 construction workers found that the average monthly salary was $21,310...
1. A random sample of 100 construction workers found that the average monthly salary was $21,310 USD with a standard deviation of $2405. A random sample of 81 Office workers found that the average salary was $27,041 with a standard deviation of $4651. a.) Calculate a 95% confidence interval for the true mean difference between office workers’ salaries and construction workers’ salaries. b.) Verify your conditions for inference c.) Interpret your confidence interval with a sentence in context. d.) According...
A random sample of 41 Japanese workers reported working 9.2 hours a day on average, with...
A random sample of 41 Japanese workers reported working 9.2 hours a day on average, with a standard deviation of 1. We also find that Canadians spend 7.4 hours on work a day on average from a random sample of 41 workers with a standard deviation of 2. Do Japanese workers work significantly differently from their Canadian counterparts at the alpha level of 0.05? Show all your work.
The ACME coping scale measures social coping behaviors. Nationally, the average score on the ACME scale...
The ACME coping scale measures social coping behaviors. Nationally, the average score on the ACME scale for adolescent girls is 53 ( = 53), with a standard deviation of 11 (σ = 11). A psychologist developed a behavioral intervention program designed to increase social coping behaviors for adolescent girls. 36 girls participated in the program. Upon completion their average ACME score was 57 (M = 57). Using the α = .05 significance level, determine if the program led to increased...
The ACME coping scale measures social coping behaviors. Nationally, the average score on the ACME scale...
The ACME coping scale measures social coping behaviors. Nationally, the average score on the ACME scale for adolescent girls is 53 ( = 53), with a standard deviation of 11 (σ = 11). A psychologist developed a behavioral intervention program designed to increase social coping behaviors for adolescent girls. 36 girls participated in the program. Upon completion their average ACME score was 57 (M = 57). Using the α = .05 significance level, determine if the program led to increased...
A random sample of 12 college graduates revealed that they worked an average of 5.5 years...
A random sample of 12 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the 95% level of confidence, what is the confidence interval for the population mean? a. 5.5 plus-or-minus 2.40 b. 5.5 plus-or-minus 0.62 c. 5.5 plus-or-minus 0.70 d. 5.5 plus-or-minus 2.16
A random sample of 20 students at a university showed an average age of 21.4 years...
A random sample of 20 students at a university showed an average age of 21.4 years and a sample standard deviation of 2.6 years. The 98% confidence interval for the true average age of all students in the university is? Enter in the upper limit of your confidence interval
A random sample of 64 students at a university showed an average age of 20 years...
A random sample of 64 students at a university showed an average age of 20 years and a sample standard deviation of 4 years. The 90% confidence interval for the true average age of all students in the university is 19.50 to 20.50 19.36 to 20.38 19.18 to 20.49 19.02 to 20.59            
4. Nationally, the unemployment rate for teenage males is 18%. A random sample of 323 teenage...
4. Nationally, the unemployment rate for teenage males is 18%. A random sample of 323 teenage males in your area reveals an unemployment rate of 21.7%. Are our local teens more likely to be unemployed?   (20%) This question is an example of statistical research using hypothesis testing. You will need to use the 5 step model of hypothesis testing to test for significance at a=.01. State assumptions State the null hypothesis and the alternative hypothesis State the appropriate hypothesis test...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT