The null hypothesis is that the laptop produced by HP can run on an average 120 minutes without recharge and the standard deviation is 25 minutes. In a sample of 60 laptops, the sample mean is 124 minutes. Test this hypothesis with the alternative hypothesis that average time is not equal to 120 minutes. What is the p-value? A. 0.535 O B. 0.121 C. 0.258 O D. 0.215 E. No correct answer
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- Suppose that we have two attributes, gender and programs and, we observe the values of bothvariables through a random sample as given below: a. selected student is male or from the Computing Engineering b. selected student is female given that she is from Electronics and Instrumentation c. selected student is not from the Computing Engineering T =28express the null hypotehsis and the alternative hypothesis in symbolic form. the manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to mantain a true mean temperature, u, of 43 F, ideal ofr a certain type of German pilsner. the owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperature is incorrectWhen you open a bag of M&M's you expect to see 30% brown, 20% yellow, 20% red, 10% orange, 10% green and 10% blue. You look in your bag of 150 M&M;s and find the following results. Is there evidence to say your bag has differing results at α=.05α=.05? Brown 49 Yellow 40 Red 40 Orange 10 Green 5 Blue 6 The Pvalue is P = . (4decimals) There is to say the results vary.
- The Old Farmer’s Almanac stated that the average consumption of water per person per day was 123 gallons. To test the hypothesis that this figure may no longer be true, a researcher randomly selected 16 people and found that they used on average 119 gallons per day and s = 5.3. At α = 0.05, is there enough evidence to say that the Old Farmer’s Almanac figure might no longer be correct? Use the P-value method.random sample of 25 college males was obtained and reached their actual height and what they wished as their ideal height A 99% confi ival for at average difference between their ideal and student heights w to 22 Based on this interval, which one of the null hypo themes below tem two-sided alte mative) can be rejected?A medical researcher says that less than 74%of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 600adults in that country, 71% think that healthy children should be required to be vaccinated. At α=0.01, is there enough evidence to support the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state H0 andHa. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) Fill the percentage on the correct answer A. % of adults in the country think that healthy children should be required to be vaccinated. B. Less than %of adults in the country think that healthy children should be required to be vaccinated. C. The percentage of adults in the country who think that healthy children should be required to be vaccinated is not %. D. More than…
- Calculateaconfidenceinterval for the me-dian ofthe second population.Select your confidenc eleve land reportit with your answer.??A company pays its employees an average wage of $22.50 an hour with a standarddeviation of $2.30. If the wages are approximately normally distributed and paid to thenearest centavos, what is the highest 5% of the employees have hourly wages that are greater than whatamount?A city official claims that the proportion of all commuters who are in favor of an expanded public transportation system is 50%. A newspaper conducts a survey to determine whether this proportion is different from 50%. Out of 225 randomly chosen commuters, the survey finds that 99 of them reply yes when asked if they support an expanded public transportation system. Test the official’s claim at α= 0.05.
- An explosion at a construction site could haveoccurred as the result of static electricity, malfunctioningof equipment, carelessness, or sabotage. Interviews withconstruction engineers analyzing the risks involved ledto the estimates that such an explosion would occur withprobability 0.25 as a result of static electricity, 0.20 as aresult of malfunctioning of equipment, 0.40 as a result ofcarelessness, and 0.75 as a result of sabotage. It is alsofelt that the prior probabilities of the four causes of theexplosion are 0.20, 0.40, 0.25, and 0.15. Based on all thisinformation, what is(a) the most likely cause of the explosion;(b) the least likely cause of the explosion?A research center claims that 26% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1000 adults in that country, 29% say that they would travel into space on a commercial flight if they could afford it. At α=0.05, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state H0 and Ha. "Recall that the claim is the percentage of adults in the country would travel into space on a commercial flight if they could afford it. Let a success be an adult in the country who would travel into space on a commercial flight if they could afford it. Translate the claim made about the population parameter from a verbal statement to a mathematical statement." (b) Use technology to find the P-value. (c) Decide whether to reject or fail to reject the null hypothesis and (d) interpret the decision in the context of the original claim.A researcher wants to explore the differences in health effects from two different types of sugar. She hypothesizes that artificial sweetener has lower long term health benefits than natural sugar. What is her null hypothesis? Fill in the blank. H0: μArtificalSweetener__________ μNaturalSugar Group of answer choices a) Less than b) Less than or equal to c) Greater than d) Greater than or equal to