On their website, a property management company states that the mean monthly rent for apartments on the east side of town is $725. A researcher for a consumer advocacy group believes that, due to the construction of newer apartment complexes in neighboring towns, the mean monthly rent on the east side, µ, is now lower. A random sample of 22 monthly rents for apartments on the east side has a mean of $715, with a standard deviation of $19. Assume that current monthly rents for apartments on the east side are approximately normally distributed. Based on the sample, is there enough evidence to conclude, at the 0.05 level of significance, that the population mean monthly rent is now less than what is stated on the website? Perform a one-tailed test. Then complete the parts below.

The speed of cars driving past Johnson City High School, on 666 Reynolds Rd, were recorded over one school year. The speed limit on that part of Reynolds Rd is 20 mph. The mean of the speed readings was 24.19 mph, with a standard deviation of 3.56 mph.

The major that you choose in college can have an impact on your future in terms of income and quality of life. Some majors, such as petroleum engineering and pharmaceutical sciences, make more on average than other majors. A random sample of 22 petroleum engineering and pharmaceutical sciences graduates have a mean annual salary of $54,118 with a standard deviation of $1479. Given that the distribution is approximately normal, test the hypothesis that the mean annual salary for petroleum engineering and pharmaceutical sciences graduates is $53,000. What is the critical value(s) for this test? The major that you choose in college can have an impact on your future in terms of income and quality of life. Some majors, such as petroleum engineering and pharmaceutical sciences, make more on average than other majors. A random sample of 22 petroleum engineering and pharmaceutical sciences graduates have a mean annual salary of $54,118 with a standard deviation of $1479. Given that the…

According to a recent report the battery life for a new line of laptop computers has a mean of 9 hours with a standard deviation of 2.4 hours.  If battery life is normally distributed what percentage of new laptops will last between 8 and 11 hours on a single charge?

The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.5 miles per gallon.​ What proportion of hybrids gets over 61 miles per​ gallon?

The National Coalition on Healthcare suggests that the mean annual premium that a health insurer charges an employer for a health plan covering a family of four averaged $13,000 in 2009. A sample of 30 families of four yields a mean annual premium paid by their employer to be $13,500 with a sample standard deviation of $300. We are interested in whether the mean annual premium that a health insurer charges an employer for a health plan covering a family of four is different from $13,000 using a significance level of 0.10. Select one: a. tdata = 9.129, do not reject Ho. b. tdata = 9.129, reject Ho. c. tdata = -9.129, do not reject Ho. O d. tdata = 4.156, reject Ho.

An article in the San Jose Mercury News stated that students in the California state universitysystem take 4.25 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 64 students and obtain a sample mean of 4.5 with a sample standard deviation of 1.5. Do the data support your claim at the 1% level?

Lawmakers are considering a new tax to discourage cigarette consumption and promote healthy lifestyle choices. Taxes on cigarettes prior to this new legislation tended to average $2.791 with a standard deviation of $0.331. To calculate the new cigarette tax, every observation in the dataset is multiplied by 1.335. What will the new mean be?

An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a standard deviation of $150.  What would be the variance?

1) According to Consumer Expenditures, the average consumer spent $1729 on apparel and services in 2017. In 2018, a random sample of 36 consumers had a mean of $1667.11 and a standard deviation of $351.69. Can it be said that at the 5% level of significance that the mean level of consumption differed in 2018 with respect to 2017?