JA company conducts a survey to determine the gender of car users across the different car types. The results of the survey are presented in the table below. Test the claim, with 90% confidence, that the car type is independent of gender. Car Truck SUV VAN Male 85 96 45 6 Female 110 75 60 3
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- A policeman believes that less than 40% of older drivers speed on highways, but a confidential survey found that 49 out of 88 randomly selected older drivers admitted speeding on highways at least once. Do these data provide convincing evidence that the policeman was wrong? I need the answer in State, Plan, Do, Conclude. format pleaseb) A claim is made that gender of an individual is associated with education level. A random sample of 405 adults revealed the data in the table. Test if gender and education level are dependent at the 0.01 level. Primary Bachelors Masters PhD Female 70 52 40 40 Male 30 56 59 58Smoking behavior is known to be related with lung problems. Assume that researchers randomly selected 600 adults to study the relationship between smoking and lung problems. The 600 adults are classified by their smoking status and whether or not they have been diagnosis with lung problems as reported in following table. Conduct a hypothesis to test if smoking and lung problems are independent. Lung problems 85 No lung problems Row total 240 Smoker 165 Non Smoker 56 294 360 Column total 141 459 600
- A physician claims that a person's diastolic blood pressure can be lowered if, instead of taking a drug, the person meditates each evening. Ten subjects are randomly selected and pretested. Their blood pressures, measured in millimeters of mercury, are listed below. The 10 patients are instructed in basic meditation and told to practice it each evening for one month. At the end of the month, their blood pressures are taken again. The data are listed below. Test the physician's claim. Use α = 0.01. Patient 1 2 3 4 5 6 7 8 9 10 Before 85 96 92 83 80 91 79 98 93 96 After 82 90 92 75 74 80 82 88 89 80A city expressway with four lanes in each direction was studied to see whether drivers preferred to drive on the inside lanes. A total of 1000 automobiles were observed during the heavy early-morning traffic, and their respective lanes were recorded. The results are shown in the following table. Lane Count 1 294 2 276 3 238 4 192 Total 1000 To test whether there is sufficient evidence to indicate that some lanes are preferred over others, they test Ho P1 P2 P3 P4 vs. Ha Pi Pj, for some i ‡j, i, j = 1, 2, 3, 4. What is the observed test statistic? Note: Please round your numerical answer to three decimal places.12.2.84 The number of successes and the sample size for a simple random sample from a population are given below. x = 6, n = 200, Ho:p= 0.02, Hạ: p# 0.02, a = 0.05 a. Determine the sample proportion. b. Decide whether using the one-proportion z-test is appropriate. c. If appropriate, use the one-proportion z-test to perform the specified hypothesis test. Click here to view a table of areas under the standard normal curve for negative values of z. Click here to view a table of areas under the standard normal curve for positive values of z. a. The sample proportion is. (Type an integer or a decimal. Do not round.)
- The question is within thebphotoState University Public relations staff at State U.phoned 850 local residents. After identifying themselves,the callers asked the survey participants their ages,whether they had attended college, and whether theyhad a favorable opinion of the university. The officialreport to the university’s directors claimed that, ingeneral, people had very favorable opinions about theiruniversity.a) Identify the W’s of these data.b) Identify the variables, classify each as categorical orquantitative, and specify units if relevant.c) Are you confident about the report’s conclusion?Explain.In a study conducted by a human resource management organization, 492 human resource professionals were surveyed. Of those surveyed, 83% said that their companies conduct criminal background checks on all job applicants. Complete parts (a) through (d). Question content area bottom Part 1a. What is the exact value that is 83% of 492 survey subjects?
- Mr. Ahmed is an enumerator for the Omani government. He collects data about the number of academic staff who took the vaccination against Covid-19 during the year 2021 in the UTAS- Shinas, can you identify the nature of data? O a. Secondary data O b. Primary data O C. Reporting data d. Requested dataAn internet company operates three indistinguishable transmitting stations at different areas. During a one-month period, the number of errors reported by each station and the causes are shown below. Error Y Computer malfunction Problems with electricity supplied Malfunctioning electrical equipment Caused by human errors 4 3. 7 7. O Option 1 1. 2. 5. 1. 4. 2. 5.
