The average price of homes sold in the U.S. in the past year was $220,000. A...
8. The average price of homes sold in the U.S. in the past year was $220,000. A random sample of 81 homes sold this year showed an average price of $210,000. It is known that the standard deviation of the population is $36,000. At level of significance (a) 0.05, conduct the hypothesis test to determine if there has been a significant decrease in the average price homes. What is appropriate Null and Alternative Hypothesis? Group of answer choices a. Ho:...
The average price of homes sold in the U.S. in the past year was $220,000. A random sample of 81 homes sold this year showed an average price of $210,000. It is known that the standard deviation of the population is $36,000. At 95% confidence test to determine if there has been a significant decrease in the average price homes. a.State the null and alternative hypotheses to be tested. b.Compute the test statistic. c.Compute the p-value. d.What do you conclude?
6. The average price of homes sold in the U.S. in 2012 was $240,000. A sample of 144 homes sold in Chattanooga in 2012 showed an average price of $246,000. It is known that the standard deviation of the population is $36,000. We are interested in determining whether or not the average price of homes sold in Chattanooga is significantly different than the national average. Let α = .01 a. Verify whether the Central Limit Theorem conditions are met. b....
The average price for new mobile homes is known to be distributed with a population standard deviation of 300. If a random sample of 36 homes resulted in a sample mean of 45,000, obtain a 90% confidence interval.
A real estate agent claims that the average price of a home sold in Beaver County, Pennsylvania, is $60,000. A random sample of 35 homes sold in the county is selected, and the prices in dollars are shown. Is there enough evidence to reject the agent's claim at 1 = 0.05? Assume @ = $76,025 and X = $84,581.43.
Having a baby in a U.S. hospital costs $2528, on average. A study of 200 AML (Active Management of Labor) deliveries had a mean cost of $2480 with a standard deviation of $766. At the 5% significance level, do the data provide sufficient evidence to conclude, that on average, AML reduces the cost of having a baby in a U.S. hospital? Perform the hypothesis test and provide the results. A. Do not reject Ho B. Do not reject Ha C....
Question 4: A study collected data for 1000 individuals in United States. This data indicates U.S. has an average life expectancy of 78.74 years with a standard deviation of 8.9 years. You would like to determine whether the U.S. has a life expectancy greater than the worldwide average, which is 71.5 years. Use this information and answer questions 4a to 4g. Question 4a: Define J p-the life expectancy of the U.S. population ?-the life expectancy of the worldwide population the...
It is believed that the average amount of money spent per U.S. household per week on food is about $96, with standard deviation $9. A random sample of 49 households in a certain affluent community yields a mean weekly food budget of $100. We want to test the hypothesis that the mean weekly food budget for all households in this community is higher than the national average. State the null and alternative hypotheses for this test, the test statistic and...
Has the mean price of corn changed over the past year? The mean price of corn sold in April 2017 was $2.00 per bushel. A sample of 22 transactions for the sale of corn in April 2018 has a mean $2.08 and standard deviation $0.20. The price for such transactions is known to be normally-distributed. Test using 5% significance. Describe the rejection region. (Use 5% significance.) (a) Reject H0 if t < −2.080 or t > 2.080 (b) Reject H0...
2) Is the average gas price in Massachusetts lower than the national average? According to AAA Gas Prices (http://gasprices.aaa.com/), the average gas price in the U.S. as of October 2019 was $2.61 with a standard deviation of $0.23. A random sample of 30 gas stations in Massachusetts had a mean of $2.56. The null and alternative hypotheses for a hypothesis test for these data are: Ho: Gas = 2.61 HA: Gas 2.61 A hypothesis test at the 0.05 level of...