In a sample of 80 workers from a factory in city A, it was found that...

In a sample of 80 workers from a factory in city A, it was found that 10% were unable to read,
while in a sample of 50 workers in city B, 14% were unable to read. Can it be concluded that
there is a difference in the proportions of nonreaders in the two cities? Use α = 0.10. Also find
the 90% confidence interval for the differences of the two proportions.

Expert Solution

orchestra answered 1 year ago

A random sample of 2000 workers in a particular city found 820 workers who had full...

A random sample of 2000 workers in a particular city found 820 workers who had full health insurance coverage. Find a 95% confidence interval for the true percent of workers in this city who have full health insurance coverage. Express your results to the nearest hundredth of a percent.

A random sample of 1600 workers in a particular city found 688 workers who had full...

A random sample of 1600 workers in a particular city found 688 workers who had full health insurance coverage. Find a 95% confidence interval for the true percent of workers in this city who have full health insurance coverage. Express your results to the nearest hundredth of a percent. Answer: _____ to _____ %

A random sample of 1600 workers in a particular city found 432 workers who had full...

A random sample of 1600 workers in a particular city found 432 workers who had full health insurance coverage. Find a 95% confidence interval for the true percent of workers in this city who have full health insurance coverage. Express your results to the nearest hundredth of a percent. .

A random sample of 1900 workers in a particular city found 399 workers who had full health insurance coverage.

A random sample of 1900 workers in a particular city found 399 workers who had full health insurance coverage. Find a 95% confidence interval for the true percent of workers in this city who have full health insurance coverage. Express your results to the nearest hundredth of a percent. Answer: to %

The monthly incomes from a random sample of workers in a factory are shown below: 18,14,12,14,12...

The monthly incomes from a random sample of workers in a factory are shown below: 18,14,12,14,12 a. Compute the margin of error (in dollars) at 98% confidence b. Compute a 98% confidence interval for the mean of the population. Assume the population has a normal distribution. Give your answer in dollars.

A random sample of 200 computer chips is obtained from one factory and 4% are found...

A random sample of 200 computer chips is obtained from one factory and 4% are found to be defective. Construct and interpret a 99% confidence interval for the percentage of all computer chips from that factory that are not defective.

A random sample of 200 computers chips is obtained from one factory and 4% are found...

A random sample of 200 computers chips is obtained from one factory and 4% are found to be defective. Construct and interpret a 99% confidence interval for the percentage of all computer chips from that factory that are not defective.

A sample of 125 workers in the Overkill Division of the Machismo Toy Factory earns an...

A sample of 125 workers in the Overkill Division of the Machismo Toy Factory earns an average of $24,375 per year. The average salary for all workers is $24,230 with a standard deviation of $523. Are workers in the Overkill Division overpaid? Conduct a one-tailed test using 95% confidence level.

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 nutritionist found that in a sample of 80 families, 22% said they ate apples at...

. A nutritionist found that in a sample of 80 families, 22% said they ate apples at least once a week. Find the 90% confidence interval of the true proportion of families who eat apples at least once a week. 5. A survey of 120 female freshmen showed that 18 did not wish to work after marriage. Find the 95% confidence interval of the true proportion of females who do not wish to work after marriage.

Question