Question

In: Statistics and Probability

G. A sample of 9 mothers was taken. The mothers were asked the age of their...

G. A sample of 9 mothers was taken. The mothers were asked the age of their oldest child. You are given their responses below.

3 12 4 7 14 6 2 9 11

a. Compute the mean.

b. Compute the variance.

c. Compute the standard deviation.

d. Compute the coefficient of variation.

e. Determine the 25th percentile.

f. Determine the median g. Determine the 75th percentile.

h. Determine the range.

Solutions

Expert Solution

orchestra answered 1 year ago
Next > < Previous

Related Solutions

Students in a different statistics class were asked to report the age of their mothers when...
Students in a different statistics class were asked to report the age of their mothers when they were born. Here are the summary statistics: Sample size: 28     sample mean: 29.643 years         sample stDev: 4.564 years Calculate the standard error of this sample mean. Determine and interpret a 90% confidence interval for the mother’s mean age (at student’s birth) in the population of all students at the college. How would a 99% confidence interval compare to the 90% confidence interval...
A random sample of 20 workers in a factory were asked to report the age of...
A random sample of 20 workers in a factory were asked to report the age of their car and how many miles the vehicle had on it. A computer printout resulted in the following information. Variable Coef SE Coef t-ratio Prob Constant 7288.54 6591 1.11 <0.2826 Age 11630.6 1249 9.31 <0.0001 R sq = 82% R sq adj = 81.1% s = 19280 Find the LSRL A new worker starts next week and we know that his car is 7...
A sample of 200 voters over the age of 60 were asked whether they thought Social...
A sample of 200 voters over the age of 60 were asked whether they thought Social Security benefits should be increased for people over the age of 65. A total of 95 of them answered yes. A sample of 150 voters aged 18–25 were asked the same question and 63 of them answered yes. A pollster wants to know whether the proportion of voters who support an increase in Social Security benefits is greater among older voters. He will use...
Exhibit 9-6. a random sample of 100 people were taken. Eighty of the people in the...
Exhibit 9-6. a random sample of 100 people were taken. Eighty of the people in the sample favored candidate A. We are interested in determining whether or not the proportion of the population in favor of candidate A is significantly more than 75%. At a 0.05 level of significance it can be concluded that the proportion of the population in favor of candidate A is ____? Is it significantly greater than 75%, not significantly greater than 75%, significantly greater than...
1. Over 9 months, a random sample of 100 women were asked to record their average...
1. Over 9 months, a random sample of 100 women were asked to record their average menstrual cycle length (in days). The sample average was 28.86 days, with a sample standard deviation of 4.24 days. (a) Calculate the lower bound for the 90% confidence interval for the true average menstrual cycle length. (b) Calculate the upper bound for the 90% confidence interval for the true average menstrual cycle length. (c) Interpret the confidence interval found in (a,b) in terms of...
A sample of 30 diabetic women was taken at a health center, and the age at...
A sample of 30 diabetic women was taken at a health center, and the age at which the disease appeared was recorded, as shown in the table Xi years Xi years Xi years Xi years Xi years 1 36 6 46 12 50 18 44 24 39 2 52 7 41 13 53 19 53 25 40 3 55 8 43 14 41 20 55 26 44 4 61 9 52 15 40 21 51 27 46 5 48 10...
A random sample of 49 children with working mothers showed that they were absent from school...
A random sample of 49 children with working mothers showed that they were absent from school an average of 6 days per term with a standard deviation of 1.8 days. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. Determine a 98% confidence interval estimate for the average number of days absent per term for all the children. Determine a 95% confidence interval estimate...
A random sample of 49 children with working mothers showed that they were absent from school...
A random sample of 49 children with working mothers showed that they were absent from school an average of 6 days per term with a standard deviation of 1.8 days. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. (6 points) Determine a 98% confidence interval estimate for the average number of days absent per term for all the children. (8 points) Determine a...
A random sample of 49 children with working mothers showed that they were absent from school...
A random sample of 49 children with working mothers showed that they were absent from school an average of 6 days per term with a standard deviation of 1.8 days. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. Determine a 98% confidence interval estimate for the average number of days absent per term for all the children. Determine a 95% confidence interval estimate...
Suppose a sample of 50 Americans is taken and they are asked whether they believe the...
Suppose a sample of 50 Americans is taken and they are asked whether they believe the federal government should make all public universities tuition-free. 40% of the sample says yes. a)Show mathematically that the Central Limit Theorem applies. b)A local politician claims that over half of Americans support this proposal. Comment on the validity of this statement, based on the 90% Confidence Interval.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT