Good Morning, I have some questions I need awnsers for please.

1.) Part 3?

A test of Ho: u = 53 versus H, : u # 53 is performed using a significance level of a = 0.05. The value of the test statistic is Z = -1.97. Part 1 of 3 Determine whether to reject Ho. Since the test statistic is in the critical region, we reject Ho at the a = 0.05 level. Part 2 of 3 V If the true value of u is 53, is the result a Type I error, a Type II error, or a correct decision? The result is a Type I error Part: 2 / 3 Part 3 of 3 If the true value of u is 37, is the result a Type I error, a Type II error, or a correct decision? The result is a (Choose one) correct decision X 5 Type I error Type II errorFacehook: A studvr showed that two years ago, the mean time spent per visit to Facebook was 19.9 minutes. Assume the standard deviation is o = 6.0 minutes. Suppose that a simple random sample of 103 visits was selected this 1\"rear and has a sample mean of I = 20.9 minutes. A social scientist is interested to know whether the mean o'me of Facebook visits has increased. Use the (1 = l[1.01 level of signicance and me Pvalue method with the TI84 calculator. (a) State the appropriate null and alternate hypotheses. {b} Compute the Pvalue. (c) State a conclusion. Use the o. = 0.01 level of signicance. (a) State the appropriate null and alternate hypotheses. H0: p. = 19.9 H]: u > 19.9 This hypothesis test is a righttailed 1' test. {b} Compute the Pvalue. Round the answer to at least four decimal places. Pvalue= (ch Determine whether to reject H0. Use the :1 = 0.01 level of signicance. (Choose one) 1' HI] at the c: = 0.01 level. RE-ECt Calibraling a scale: Making sure that the scales used by businesses in the United States are accurate is the responsibility of the National Institute for Standards and Technology {MIST} in Washington, D.C. Suppose that NIST technicians are testing a scale by using a weight known to weigh exactly 1000 grams. The standard deviation for scale reading is known to be (I = 3.2. They weigh this weight on the scale 58 mes and read the result each time. The 58 scale readings have a sample mean of; = 1000.? grams. The calibration point is set too high if the mean scale reading is greater than 10'0'0I grams. The technicians want to perform a hypothesis test to determine whether the calibration point is set too high. Use the a: 0.10 level of signicance and the Pvalue method with the 1184 calculator. State the appropriate null and alternate hypotheses. - H12p>1000 This hypothesis test is a righttailed 'I' test. Find the Pvalue. Round the answer to at least four decimal places. Pvalue = Determine whether to reject H0. (Choose one) 'I' the null hypothesis H\". Re'ect Good credit: The Fair Isaac lCorporation (FICD) credit score is used by banks and other lenders to determine whether someone is a good credit risk. Scores range from 300 to 350, with a score of 720 or more indicating that a person is a very good credit risk. An economist wants to determine whether me mean FICO score is more than the cutoff of 720. She nds that a random sample of 50 people had a mean FICO score of 765 with a standard deviation of 98. Can the economist conclude that the mean FICD score is greater than 720? Use the a: 0.01 level of signicance and me Pvalue method with me "IT84 Plus calculator. State the appropriate null and alternate hypotheses. H0: '1 = 72.0 H]: p > 72.0 This hypothesis testis a righttailed Y tESt- Compute the Pvalue. Round the answer to at least four decimal places. Pvalue = m Determine whether to reject H0. Reject T the null hypothesis H0. Reect Weight loss: In a study to determine whether counseling could help people lose weight, a sample of people experienced a groupbased behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months. The following data are the numbers of pounds lost for 14 people. Assume the population is approximately normal. Perform a hypothesis test to determine whether the mean weight loss is greater than 1? pounds. Use the :1 =0.01 level of signicance and the Pvalue method with the 1184 Plus calculator. 20.8 27.0 6.1 22.5 19.5 11.2 16.0 19.5 35.9 32.3 10.7 34.3 21.9 17.7 SenddatatoEmel (a) State the appropriate null and alternate hypotheses. H]: p > 17 This hypothesis test is a righttailed Y tESt- {b} Compute the Pvalue. Round the answer to at least four decimal places. Pvalue= 1.3623 Correct Answer: Pvalue = 0.0543 Part 3 of 4 (c) Determine whether to reject Ho. (Choose one) the null hypothesis Ho. X Reject 5 Do not rejectIn a simple random sample of size 57, there were 45 individuals in the category of interest. A (a) Compute the sample proportion p. Round the answer to at least three decimal places. The sample proportion is 0.789 . (b) Are the assumptions for a hypothesis test satised? Explain. Yes I the number of individuals in each category is 10. (c) It is desired to test H0 :p = 0.7 versus H1 :p > 0.7. Compute the test statistic 2. Round the answer to at least two decimal places. Spam: 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 77%. He examines a random sample of 500 emails received at an email server, and finds that 362 of the messages are spam. Can you conclude that less than 77% of emails are spam? Use both a = 0.05 and a = 0.10 levels of significance and the critical value method with the table. Part 1 of 5 State the appropriate null and alternate hypotheses. Ho: p = 0.77 H: p