An engineer believes that by employing robots instead of humans for certain jobs in the manufacturing of USB sticks, the average number of faults may be reduced. The average number of bad drives per 1000 people is 18. State the alternative hypothesis.
Q: A group of researchers is asked to check whether the average weight of penguins in a certain colony…
A: Type II error: In hypothesis testing the Type II error is said to be committed when false null…
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A: From the given information, the number of Lyme disease cases in Providence county is, 441. The…
Q: humans we consume food. The body extracts good things such as proteins and vitamins and throws away…
A: We have given that, The data set are, 5.94 5.79 4.21 6.59 4.59 3.33 5.27 3.27 Then, We will find…
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Q: A researcher finds that talking on the phone while driving does not distract you from the road but…
A: type 1 error: reject the null hypothesis when it is true type 2 error: fail to reject the null…
Q: A certain allergen affects approximately 3 people per 10,000 in the United States. Assuming the U.S.…
A: Since the number of people affected per 10, 000 =3 so , if there is only one person then chance of…
Q: a) Choose an appropriate test procedure and write that procedure here. b) State any assumptions or…
A: u = 96 xbar = 100.55 s = 6.34 n = 36
Q: In an avocado exporting country there is an undesirable disease in avocados. He decides to take a…
A: From the provided information, Sample size (n) = 1000 From which 204 were infected avocados.…
Q: The "Jupiter Bar" is a candy bar that is only manufactured and sold in one size. Tens of thousands…
A: Given Information : The "Jupiter Bar" is a candy bar that is only manufactured and sold in one…
Q: Intensive care units (ICUs) generally treat the sickest patients in a hospital. ICUs are often the…
A: It is given that the average length of stay in ICU is 3.3 days.
Q: Chlorine is often added to swimming pools to control microorganisms. If the level of chlorine rises…
A: Consider: an is the amount of chlorine in n days. and ao is the amount of chlorine added in the…
Q: Surgery was performed on 492 patients in the Anywhere Health Care Facility during March, and 27 of…
A: Given information: Total number of patients who received a surgery is 492. Total number of death…
Q: A media personality argues that global temperature are not rising, because every year an increase is…
A: Given that the margin of error = 0.15 Every year the temperature is rising by 0.08 degrees C. So…
Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…
A: Let p denotes the population proportion of driver fatalities related to alcohol. The test is that…
Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…
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Q: 14. Show that Var(aX+b) = a² Var(X). X-E(X)
A: We have to show that Var(aX + b) = a2Var(X)
Q: A media personality argues that global temperatures are not rising, because every year and increase…
A:
Q: As humans we consume food. The body extracts good things such as proteins and vitamins and throws…
A: The sample mean and standard deviation of the test results is,
Q: Please no written by hand solution and no img 2. A medical research team conducted a study to test…
A: Null hypothesis: The death rate due to heart disease is the same for both populations. Alternative…
Q: A media personality argues that global temperatures are not rising, because every year an increase…
A: Given margin of error = 0.15Every year an increase of 0.08 degrees C is reported. Margin of error =…
Q: If you wanted to be 99% confident that your estimate of the average Florida rainfall was within 3…
A: Given, Margin of Error ∈=3 Standard deviationσ=9 and ∝=1-0.99 ∝=0.01…
Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…
A: State the hypotheses. That is, there is no evidence that population proportion of driver fatalities…
Q: You are a paranoid delusional statistician with far too much time on your hands. One day, you sit…
A: From the given information:
Q: Burning fuels in power plants and motor vehicles emits carbon dioxide (CO2), which contributes to…
A: Given data : Country CO2 Emissions (Metric tons per capita) Aruba 32.92 Andorra 5.97…
Q: 2019, the percent of total labor force of the world that were women was about 39%. The United…
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- Tuff Rubbers, a tire manufacturer, knows that 5% of the tires it produces are defective. To reduce the number of defective tires that make it to market, the manufacturer uses a special device to test each tire before shipping it out. The test will correctly detect a defective tire 97% of the time. However, the test will incorrectly indicate a good quality tire is defective 6% of the time. If the test indicates a tire is defective, the tire is recycled. Otherwise, the tire makes it to market. Let D represent the event a tire is defective, and T represent the event the test indicates a tire is defective. In each part of this question, express each probability only in terms of the events D and T and justify any computation by explicitly stating the formula you are using. (a) Express each of the three probabilities listed above in terms of the events D and T. (b) What percentage of tires are recycled? (c) What percentage of recycled tires are not defective? (d) What percentage of…A soda company sells one of its soft drinks in 12 ounce cans. In order to ensure that every can has at least 12 ounces in it, the machines in the factory are set to fill each can with an average of 12.1 ounces of soda. Every week, a quality-control technician tests 10 cans to make sure that the average amount of soda in the cans is still 12.1 ounces. If the conclusion of the test is that the number of ounces of soda in the cans is different from 12.1, the technician will declare that the process is out of control, and the machine will be stopped and calibrated. From previous tests, the technician found that the standard deviation of the number of ounces of soda in the cans is approximately 0.01. The number of ounces of soda in the 10 cans that were tested this week is given below. Assume that the standard deviation from the technician's previous tests is the population standard deviation. Use a TI-83, TI-83 Plus, or TI-84 calculator to test whether filling process is out of control and…While the mail-order DVD rental market has slowed with the advent of streaming, mail-order is still the only way to find rare movies. Raredvds.biz is considering moving into the rental business after considerable success selling DVDs. To gauge their customer service, they are considering the case of the 1980 film The Monster Club featuring Vincent Price. Raredvds.biz expects to have one copy of the DVD. Based on data collected from customers, Raredvds.biz believes that the average time between orders for the film will be about 10 days with a coefficient of variation of one. Using customer data, the company also believes that including shipping time, both ways, the DVD will on average spend seven days in service, with a coefficient of variation of one. How long does a customer wait on average before being shipped the DVD?
- A national study found that treating people appropriately for high blood pressure reduced their overall mortality by 20%. Treating people adequately for hypertension has been diffcult because it is estimated that 50% of hypertensives do not know they have high blood pressure, 50% of those who do know are inadequately treated by their physicians, and 50% who are appropriately treated fail to follow this treatment by taking the right number of pills. Answer the following questions ( please answer all the parts 1,2 and 3): 1) What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?2) What is the probability that at least 7 of the 10 hypertensives know they have high blood pressure? 3) If the preceding 50% rates were each reduced to 40% by a massive education program, then what effect would this change have on the overall mortality rate among true hypertensives; that is, would the mortality rate decrease…A low resting heart rate can mean a high degree of physical fitness, which is associated with reducedrates of cardiac events like heart attacks. By working out regularly in the gym, the heart becomes moreefficient, pumping the lowest amount of blood one needs when in a relaxed state. Normal resting heartrate for adults ranges from 60 to 100 beats per minute but a well-trained athlete can have a normal restingheart rate as low as 40 beats per minute. Dr. Castillejo wants to know if her gym members have attainedthis average resting heart rate of athletes. Use the R commander output below to address Dr. Castillejo’sconcern . Write a brief report about the analysis by identifying the set of hypotheses to be tested, theappropriate test to use, and implications and recommendations of/from the conclusions.Hectic Repair Org. HRO) helps repair homes that are structurally weakened by minor earthquakes. After an earthquake, SmartProtect, an insurance company of some affected customers in the area estimates that the standard time to perform a preliminary damage assessment on an average-sized house would be about two hours. On behalf of the affected customers, SmartProtect is willing to pay a HRO employee doing such damage assessments $65 per hour. Suppose that Michael (an employee at HCRO who does flood damage assessment) takes three hours to complete the assessment on an average-sized house. What is Michael efficiency based on the standard time estimated by SmartProtect? a. Approximately one hundred and fifty percent. b. About one-third of an assessment job per hour c. Approximately one hundred and thirty dollars per assessment d. Approximately one hundred and ninety five dollars per assessment (before taxes) e. Approximately sixty seven percent.
- Jerry is considering opening a new ice cream store at a certain location on State Street in Madison. Jerry conducts some analysis and determines that a given location is acceptable only if the number of pedestrians passing the potential location averages more than 100 per hour. To check if this location is acceptable, Jerry records the number of pedestrians observed for each of 40 hours. Jerry finds that the average number of pedestrians that pass the potential location during each of the 40 hours he was observing, is 105.7 per hour. Jerry assumes that he knows the population standard deviation to be 16. Can Jerry conclude at the 1% significance level that the potential location for the ice cream store is acceptable? a. What is the correct set of hypotheses? Answer: Ho: u = 100 and H1: u> 100 v b. Determine the p-value Answer: 0.0122 c. Interpret the results Answer: There is not enough evidence d. Jerry is concerned with committing a Type II error. Determine the probability of Type II…Intensive care units (ICUS) generally treat the sickest patients in a hospital. ICUS are often the most expensive department in a hospital because of the specialized equipment and extensive training required to be an ICU doctor or nurse. Therefore, it is important to use ICUS as efficiently as possible in hospital. According to a 2017 large-scale study of elderly ICU patients, the average length of stay in the ICU is 3.4 days (Critical Care Medicine journal article). Assume that this length of stay in the ICU has an exponential distribution. Do not round intermediate calculations. a. What is the probability that the length of stay in the ICU is one day or less (to 4 decimals)? b. What is the probability that the length of stay in the ICU is between two and three days (to 4 decimals)? c. What is the probability that the length of stay in the ICU is more than five days (to 4 decimals)?Is Homework Truly Beneficial? Two decades ago, researchers believed that homework had a negative impact on students’ physical and emotional health, yet students are still bogged down with hours of homework as early as the second grade. According to research by several universities, elementary students spend an average of 3 hours a week doing homework. The same studies revealed that the average high school student spends over 22 hours a week on homework. In fact, students today spend more than double the time on homework than students two decades ago. Sadly, as time spent on homework doubles, student performance continues to decline. So, how then is homework helping? Homework is harmful and not the key to student success. 2 Select the correct answer. How does the writer introduce the claim? A. by using research to set the context for the argument against homework B. by telling a short personal story about her struggles with homework C. by comparing…
- A strain of Staphylococcus aureus doubles every 8 hours. A colony of 20000 was cultured in a petri dish for 8 hours. What is the population of the strain after a day?A school Psychologist is interested in the effect of violent television programs on a child's agression depending on if the show is a cartoon or not. Eighty children were recruited and were divided into equal groups. Half of the children watched a violent television program while the other half watched a non- violent program. Half of the children watched a cartoon while the other half watched a show that was not a cartoon. The children were then placed in a small group and the researcher measured the level of agressiveness of each child. A) z- test B) t - test C) test independent samples D) T - TEST RELATED SAMPLES E) ANOVA F) FACTORIAL ANOVA G) repeated measures ANOVA H) pearson correlation i) chi squareThe world bank reports that one. 7% of the US population lives unless than two dollars per day. A policy maker claims that this number is misleading because of variations from state to state and rural to urban. To investigate that she takes a random sample of 100 households in Atlanta to compare with the national average and finds at two. One percent of the Atlanta population live on less than two dollars per day. Select the Noel an eternity of hypothesis to test weather Atlanta differ significantly from the national percentage.
