Suppose 90% of a sample of 100 randomly selected homes in Town A and 80% of...

Suppose 90% of a sample of 100 randomly selected homes in Town A and 80% of a sample of 50 randomly selected homes in Town B rely on the public water supply for drinking water. Compute the test statistic for a hypothesis test to compare the population proportion of homes that rely on the public water supply for drinking water in Town A to the proportion in Town B. Assume that the conditions for a hypothesis test for the difference between the population proportions are met. Round your answer to two decimal places.

z score=??

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

9) In a sample of 400 people selected randomly from one town, it is found that...

9) In a sample of 400 people selected randomly from one town, it is found that 130 of them are Gamecock Fans. At the 0.05 significance level, test the claim that the proportion of all people in the town who are Gamecock fans is 27%. A] What type of statistical test can be used here? a. Z-test of proportions c. F Test e. Either c2 or λ Test b. a-Test of proportions d. Either T or F-Test f. T-Test...

A sample of 100 randomly selected oranda goldfish has a mean length of 6.75 inches. Suppose...

A sample of 100 randomly selected oranda goldfish has a mean length of 6.75 inches. Suppose it is known that the population standard deviation of lengths of orandas is 0.985 inches. Use a 0.05 significance level to test the claim that the mean length of an oranda is greater than 6.65 inches. Fill in the following information as you test the above claim: State the claim symbolically and the opposite of the claim. H0: h1: Teststatistic: P-value: Conclusion:

Of 94 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence...

Of 94 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence interval for the proportion of all adults in the town who have health insurance.

Suppose a simple random sample of 90 students from this district is selected. What is the...

Suppose a simple random sample of 90 students from this district is selected. What is the probability that at least half of them have brown eyes? (Use technology. Round your answer to three decimal places.) Brown eyes is 40% I got 0.026 as my answer but the program is saying it is wrong, can someone figure out the correct answer please

A random sample of 100 employees from 5 different companies was randomly selected, and the number...

A random sample of 100 employees from 5 different companies was randomly selected, and the number who take public transportation to work was recorded. The results are listed below. Perform a homogeneity of proportions test to test the claim that the proportion who take public transportation to work is the same in all 5 companies. Use α= 0.01. 1 2 3 4 5 Use Public Trans. 18 25 12 33 22 Don't Use Public Trans. 82 75 88 67 78...

Suppose 56 out of 100 randomly selected students support the proposal that will shorten the semester...

Suppose 56 out of 100 randomly selected students support the proposal that will shorten the semester to 15 weeks. A. What is the sample proportion of supporting the proposal? B. Under what conditions can we use normal distribution to approximate the distribution of sample proportion? Verify if these conditions hold. C. Find a 95% confidence interval for the proportion of all students who support the proposal. D. Suppose no students are surveyed. What sample size does the investigator need to...

If a random sample of 20 homes south of a town has a mean selling price...

If a random sample of 20 homes south of a town has a mean selling price of $145,225 and a standard deviation of $4600, and a random sample of 20 homes north of a town has a mean selling price of $148,575 and a standard deviation of $5700, can you conclude that there is a significant difference between the selling price of homes in these two areas of the town at the 0.05 level? Assume normality. (a) Find t. (Round...

Scott Duffney, CPA, has randomly selected and audited a sample of 100 of Will-Mart’s accounts receivable....

Scott Duffney, CPA, has randomly selected and audited a sample of 100 of Will-Mart’s accounts receivable. Will-Mart has 3,000 accounts receivable accounts with a total book value of $3,850,000. Duffney has determined that the account’s tolerable misstatement is $1,100,000. His sample results are as follows: Average audited value $ 1,280 Average book value 1,286 Required: Calculate the accounts receivable estimated audited value and projected misstatement using the: (Do not round your intermediate calculations and round your final answer to nearest...

Scott Duffney, CPA, has randomly selected and audited a sample of 100 of Will-Mart’s accounts receivable....

Scott Duffney, CPA, has randomly selected and audited a sample of 100 of Will-Mart’s accounts receivable. Will-Mart has 3,000 accounts receivable accounts with a total book value of $3,700,000. Duffney has determined that the account’s tolerable misstatement is $950,000. His sample results are as follows: Average Audited Value $1,230 Average Book Value $1,238 Calculate the accounts receivable estimated audited value and projected misstatement using the: (Do not round your intermediate calculations and round your final answer to nearest whole dollar.)...

Suppose a randomly selected sample of n = 66 men has a mean foot length of...

Suppose a randomly selected sample of n = 66 men has a mean foot length of x = 26.5 cm, and the standard deviation of the sample is 3 cm. Calculate an approximate 95% confidence interval for the mean foot length of men. (Round the answers to one decimal place.) ()to () cm

Subjects