We want to conduct a hypothesis test of the claim that the population mean reading speed of sicond graders is different

[answerhappygod]

We Want To Conduct A Hypothesis Test Of The Claim That The Population Mean Reading Speed Of Sicond Graders Is Different 1 (25.05 KiB) Viewed 8 times

We Want To Conduct A Hypothesis Test Of The Claim That The Population Mean Reading Speed Of Sicond Graders Is Different 2 (34.54 KiB) Viewed 8 times

We want to conduct a hypothesis test of the claim that the population mean reading speed of sicond graders is different from 28.7 words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 29.2 words per minute and a standard deviation of 3.1 words per minute. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic Round your answers to two decimal places. (a) The sample has size 20, and it is from a normally distributed population with a known standard deviation of 2.5. 0:-0 01-0 O It is unclear which test statistic to use. (b) The sample has size 19, and it is from a normally distributed population with an unknown standard deviation. 01-0 01-0 O It is unclear which test statistic to use. mentingER X 5 © 2022 MMLLCA | Ponny One

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, H, is now lower. A random sample of 21 monthly rents for apartments on the east side has a mean of $720, with a standard deviation of $20. 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. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas) (a) State the null hypothesis H, and the alternative hypothesis 1₁. H₂:0 #₁:0 (b) Determine the type of test statistic to use. (Choose one) (e) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the critical value. (Round to three or more decimal places) 0 (e) Can we conclude that the mean monthly rent for apartments on the east side is less than what is stated on the website? Yes No Continue H IK X D x P S 8 8 0-000020 000+ DE ? G Exportd