25 item exam (2 points each QUESTION) i got 42/50.

NOT ALL ITEMS ARE HERE ( system cant do 25 , so i took out some questions that im 101% sure im correct)

Can you help me CORRECT AND IDENTIFY my incorrect aswers.

Please show a correct ad organize solution. Thank you very much!

Question 2 The incubation period refers to the number of days between being in contact with an infected person and actually showing symptoms of being infected. Health care professionals say that the mean incubation period of COVID-19 is 12 days with a standard deviation of 2 days. This accounts for the 14-day quarantine period. With the recent upsurge of infections due to the different variants of the virus, a group of researchers surveyed 16 confirmed cases. These are their incubation periods: 8, 8, 8.5, 9, 9.5, 10, 10, 10.25, 11, 12, 12.25, 12.5, 12.5, 12.75, 13, & 14.5. Is there enough evidence to show that the mean incubation period has actually decreased? Test at 1% level of significance. Which of the following statements is NOT true? A If the level of significance is increased by 0.9%, then the Ho would be rejected. B If the level of significance is increased by 1%, then the Ho would be rejected. If the level of significance is increased by 1%, then the Ho would not be rejected. D If the level of significance is decreased by 0.9%, then the Ho would not be rejected.Question 4 The incubation period refers to the number of days between being In contact with an infected person and actually showing symptoms of being Infected. Health care professionals say that the mean Incubation period of COVlD19 Is 12 days with a standard deviation of 2 days. This accounts for the 14 day quarantine period. With the recent upsurge of infections due to the different variants of the virus, a group of researchers surveyed 100 confirmed cases and found that the mean Incubation period ls 11.5 days. Is there enough evidence to show that the mean incubation period has actually changed? If the decision is to reject the Ho which of the statements below provide an appropriate conclusion? There is sufficient evidence to show that the mean incubation period has increased, and hence, there is a need to lengthen the quarantine period being imposed. There is sufficient evidence to show that the mean incubation period has decreased, and hence, there is a need to shorten the quarantine period being imposed. 0 There Is sufcient evidence to show that the mean Incubation period has changed, and hence. there Is a need to change the quarantine perlod currently being Imposed. There is insufficient evidence to show that the mean incubation period has changed. and hence. there is no need to change the quarantine period being imposed. Question 5 The following data below shows the average working time recorded (in hours) of part - time working students in a certain fast - food chain. 3.4 2.5 4.8 2.9 3.6 2.8 3.3 5.6 3.7 2.8 4.4 4.0 5.2 3.0 4.8 Assuming that the data represent a random sample from a normal population, construct a 95% confidence interval estimate for M. A 2.52 5% a12 :11le Question 18 Philippine Overseas Employment Administration (POEA) claims that the average fees or cost to work abroad excluding the placement fees Is at most 13.750 php with a standard deviation of 2,025 php. But a group of placement agencies oppose the claim and found that the average fees or cost taken from 123 OFW's ls 14.125 php. Perform a hypothesis testing with a = 5% to see if the claim ls correct. Prompts Submitted Answers What Is the appropriate null hypothesis? us 13,750 Determine the test statistic value. ' z = 2 05 Determine the type of test to use. one - tailed test, right - tailed Question 19 A confidence statement is given as P(19.9