Good Evening, I need answers for some questions please.

1.) Part 2?

Type I error: A company that manufactures steel wires guarantees that the mean breaking strength (in kilonewtons) of the wires is greater than 50. They measure the strengths for a sample of wires and test H0 : p. = 50 versus H1 : p. > 50. If a Type I error is made, what conclusion will be drawn regarding the mean breaking strength? The conclusion will be that the mean breaking strength is greater than 1' 50. If a Type [I error is made, what conclusion will be drawn regarding the mean breaking strength? The conclusion will be that me mean breaking sirength is 50. equal to not equal to less than If a Type II enor is made, what conclusion will be drawn : areater than less than or greater than The conclusion will be that me mean breaking strength is (Choose one} A test is made of Ho: u = 19 versus H: u > 19. A sample of size n = 49 is drawn, and x = 22. The population standard deviation is 6 = 8. (a) Compute the value of the test statistic z. (b) Is Ho rejected at the a = 0.01 level? (c) Is Ho rejected at the a = 0.10 level? Part: 0 / 3 Part 1 of 3 (a) Compute the value of the test statistic. Round the answer to at least two decimal places. Z = X 5Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.2 minutes. Assume the standard deviation is o = 10.0 minutes. Suppose that a simple random sample of 103 visits was selected this year and has a sample mean of x = 19.2 minutes. A social scientist is interested to know whether the mean time of Facebook visits has decreased. Use the a = 0.10 level of significance and the P-value method with the TI-84 calculator. (a) State the appropriate null and alternate hypotheses. (b) Compute the P-value. (c) State a conclusion. Use the a = 0.10 level of significance. Part: 0 / 4 Part 1 of 4 (a) State the appropriate null and alternate hypotheses. Ho 00 0=0 HE This hypothesis test is a right-tailed test. right-tailed X 5 left-tailed two-tailedHouse prices: Data from the National Association of Realtors indicate that the mean price of a home in Denver, Colorado, in 2.012 1was 260.? thousand dollars. A random sample of 72 homes sold in 2013 had a mean price of 286 thousand dollars. Can you conclude that the mean price in 2013 is greater than the mean price in 2012? Assume the population standard deviation is o = 158. Use the o.= 0.01 level of signicance and the Pvalue method with the TI84 calculator. State the appropriate null and alternate hypotheses. HoD III-=- Eli-I E|=I This hypothesis test is a (Choose one} 1' test. riqht-tail ed lefttailed twotailed Interpreting calculator display: The following 1184 Plus display presents the results of a hypothesis test. p. 0 0=0 H This hypothesis test is a (Choose one) test. left-tailed X 5 right-tailed two-tailedCommuting to work: A community survey sampled 1923 people in Colorado and asked them how long it took them to commute to work each day. The sample mean oneway commute time was 25.9 minutes wii a standard deviation of 13 minutes. A transportation engineer claims that the mean commute time differs from 25 minutes. Do the data provide convincing evidence that the engineer's claim is tnie? Use the a: 0.10 level of signicance and the critical value method Iwith me 9 Critical Values for the Student's t Distribution Table. (a) State the appropriate null and alternate hypotheses. lefttailed righttailed twotailed College tuition: The mean annual tuition and fees in the 2013-2014 academic year for a sample of 25 private colleges in California was $35,500 with a standard deviation of $7600. A dotplot shows that it is reasonable to assume that the population is approximately normal. Can you conclude that the mean tuition and fees for private institutions in California differs from $35,000? Use the a = 0.01 level of significance and the critical value method with the @ Critical Values for the Student's t Distribution Table. Part: 0 / 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. 00 0=0 Ho 0#0 H1 X 5 This hypothesis test is a (Choose one) V test. left-tailed right-tailed two-tailedIn a simple random sample of size 58, there were 36 individuals in the category of interest. Part: 0 / 4 Part 1 of 4 A (a) Compute the sample proportion p. Round the answer to at least three decimal places. The sample proportion is X 5Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system manager at a large corporation believes that the percentage at his company may be 78%. He examines a random sample of 500 emails received at an email server, and finds that 369 of the messages are spam. Can you conclude that less than 78% of emails are spam? Use both a =0.10 and a = 0.01 levels of significance and the critical value method with the table. Part: 0 / 5 Part 1 of 5 State the appropriate null and alternate hypotheses. Ho: 00 0=0 H1 P This hypothesis test is a (Choose one) test. X 5 left-tailed right-tailed two-tailedCuring diabeta: Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order to produce weight loss. In a recent study, 82 patients with Type 2 diabetes underwent this procedure, and 59 of them experienced a recovery from diabetes. Does this study provide convincing evidence that less than 72% of those with diabetes Who undergo this surgery will recover from diabetes? Use the 11: 0.05 level of signicance and the Pvalue method with the TI84 Plus calculator. (a) State the appropriate null and alternate hypotheses. H: 0 E El:- cl:- E|=l H1 : D Elatl P tESt- - right-tailed This hypothesis test is a lefttailed twotailed Quit smoking: In a survey of 444 HIV-positive smokers, 187 reported that they had used a nicotine patch to try to quit smoking. Can you conclude that less than half of HIV-positive smokers have used a nicotine patch? Use the a = 0.05 level of significance and the P-value method with the TI-84 Plus calculator. Part: 0 / 4 Part 1 of 4 (a) State the appropriate null and alternate hypotheses. Ho 00 0=0 H1 : 0#0 P This hypothesis test is a (Choose one) test. X 5 right-tailed left-tailed two-tailed