A humane society claims that less than 69%of households in a certain country own a pet. In a random sample of 600 households in that country, 402 say they own a pet. At α=0.10, is there enough evidence to support the society's claim?
Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…
A: Given: H0:p≥0.72Z0 = 2.33p = 72% = 0.72p^= 70% = 0.70 Sample size (n) = 300Find the test statistic?
Q: A doctor claims that less than 30% of all persons exposed to a certain amount of radiation will feel…
A:
Q: A random sample of 300 male students at PCC shows that 230 of them have internet access at home…
A: Given data : x1= 230.0 n1= 300 x2= 290.0 n2= 350 significance level,…
Q: A Texas Garden Center wants to store leftover packets of vegetable seeds from their spring sale to…
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Q: According to one survey taken a few years ago, 32% of American households have attempted to reduce…
A: Given : Let p be the proportion of American households have attempted to reduce their long-distance…
Q: According to one survey taken a few years ago, 32% of American households have attempted to reduce…
A: From the given information we conduct Z test for proprtion.
Q: A public research company says that 63% of U.S. adults are concerned about their jobs because of the…
A: Given, Population proportion = p = 63% = 0.63Sample proportion = p^ =70% = 0.70Sample size = n =…
Q: A sample of n = 81 scores is obtained from a population with µ = 80 and σ = 27. If the sample mean…
A: Given that, Sample size, n = 81 Z score = +2.33 μ=80 and σ=27
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A: Let X represents the Number of children age 2 to 6 having the hyperlipidemia in a sample of 12…
Q: In a study to estimate the proportion of residents in a city that support the construction of a new…
A: Let p be the proportion of residents in a city that support the construction of new bypass road in…
Q: Results from a survey conducted in a certain grocery store showed that 3 out of 5 people preferred…
A:
Q: Let p, and p, be the respective proportions of women with iron-deficiency anemia in each of two…
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Q: large research project showed that in a sample of 750 adults, 60 of them experienced a midlife…
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Q: Based on information from a previous study, r, = 35 people out of a random sample of n, = 104 adult…
A: There are two populations which are Americans who did not attend college and Americans who did…
Q: In a random sample of 1000 persons from U.P. 510 were found to be consumers of cigarettes. In…
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Q: l study, a random sample of 540 participants agree to have their blood drawn, which is to be…
A: The random variable X which represents the number of samples out of the 10 who have these…
Q: An organization published an article stating that in any one-year period, approximately 11.5 percent…
A:
Q: Let p, and p, be the respective proportions of women with iron-deficiency anemia in each of two…
A: Given that,sample one, x1 =469, n1 =1800, p1= x1/n1=0.2606sample two, x2 =531, n2 =2000, p2=…
Q: A study found that in 2005 12.5% of US workers belonged to unions. Suppose a sample of 500 US…
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Q: A humane society claims that less than 67% of US households own a pet. In a random sample of 600 U.S…
A: Given, The sample proportion is,
Q: In a sample of 137 leopards selected randomly from one preserve, it is found that 7 of them have…
A: H0 : p = 0.13 H1: p ≠ 0.13
Q: 8% of all Americans suffer from sleep apnea. A researcher suspects that a higher percentage of those…
A: Given data number of success , x= 37.0 sample size, n = 367 population…
Q: A certain type of cold vaccine is known to be only 25% effective after a period of 2 years. To…
A: Test is that whether a new vaccine is superior in providing protection against the virus for a…
Q: construct a 95% C.I. for the actual; percentage of shoppers who live more than 15 miles from that…
A: The sample size is n = 200 Proportion of shoppers who live more than 15 miles from that center in…
Q: Historically, the proportion of people who trade in their old car to a car dealer when purchasing a…
A: Solution: Given information: n= 115 Sample size x= 46 success p^=xn=46115=0.40 sample proportion…
Q: According to one survey taken a few years ago, 32% of American households have attempted to reduce…
A: The single proportion binomial test is used to compare a proportion of responses or values in a…
Q: A poll reported that 63% of adults were satisfied with the job the major airlines were doing.…
A: If we have n trials each having two outcomes, say Success and Failure, trials being independent and…
Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…
A:
Q: A local jam production company is confident that 60% of the population will like its new grapefruit…
A: Here events are independent.
Q: For a population with σ = 10, how large a sample is necessary to have a standard error that is: Less…
A: The standard deviation of the population is σ=10.
Q: A breathalyser test is used by police in an area to determine whether a driver has an excess of…
A: The conditional probability of happening of event A when event B already happened, can be expressed…
Q: If x, x2 ... Xn is a random sample from N (µ, o²) popula- tion, find sfficient estimator for µ and…
A: ANSWER: For the given data,
Q: adult population play video games in their leisure time. A random sample of 195 U.S. adults found…
A: Solution
Q: Among college students, the proportion p who say they're interested in their congressional…
A: Given that Sample size n =260 Favorable cases x =185 Sample proportion p^=x/n =185/260 =0.7115…
Q: A simple random sample of size n=14 is obtained from a population with μ=67 and σ=19. Assuming…
A: From the given information, Consider, Sample size (n) = 14 Population with μ=67 and σ=19. Thus,
Q: A research center claims that 31% of adults in a certain country would travel into space on a…
A: To testH0:p=0.31H1:p≠0.31 where p0=0.31
Q: To test H0: μ = 50 versus H1: μ < 50, a random sample of size n = 24 is obtained from a population…
A:
Q: An organization published an article stating that in any one-year period, approximately 11.5 percent…
A:
Q: In a random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to…
A: Hypotheses: Here p1 and p2 be the two proportions. The aim is to check whether p1= p2. The null…
Q: A medical researcher says that 25% of U.S. adults are smokers. In a random sample of 272 US. adults,…
A:
Q: ne that you conducted a single-sample t test with 8 participants. For a
A: Where, n=number of observations α = level of significance
Q: In a random sample of 1022 Canadian adults, 480 think that the Canadian government is doing too…
A:
Q: A study of 200 randomly selected occupants in passenger cars and 250 randomly selected occupants in…
A: Here, p1 represents the proportion of occupants in passenger cars and p2 represents the proportion…
Q: In a random sample of 320 cars driven at low altitudes, 50 of them exceeded a standard of 10…
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Q: A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27…
A: Givenx=27n=90p^=xn=2790=0.30α=0.05claim isThe population proportion with history of intrapartum or…
Q: Thus, the final conclusion is that ... The data suggest the population proportion is not…
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Q: In a sample of 88 children selected randomly from one town, it is found that 8 of them suffer from…
A: Given information- Sample size, n = 88 It is found that 8 of them suffer from asthma. So, x = 8 So…
Q: 3 out of 4 american adults under age 35 have eaten pizza for breakfast. if a random sample of 20…
A: Let the R.V X denotes the number of adults eaten pizza for breakfast and it follows the binomial…
Q: A researcher conducts ANOVA and calculates a test statistic of F=5.73. If dftotal = 14, dfwithin =…
A:
Q: A research center claims that at least 27% of U.S adults think that the IRS will adult their taxes.…
A: Let p be the population proportion of U.S adults think that the IRS will adult their taxes. The…
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- A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27 had a history of intrapartum or postpartum infection. Can we conclude that the population proportion with a history of intrapartum or postpartum infection is significantly less than or equal to 0.25? Let alpha = 0.05.A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27 had a history of intrapartum or postpartum infection. Can we conclude that the population proportion with a history of intrapartum or postpartum infection is less than or equal to 0.25. Let alpha = 0.05A research center claims that 30% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1200 adults in that country, 33% 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. Identify the P-value?
- A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 79%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in mot e than 79% of married couples. In a random sample of 225 married couples who completed her program, 194 of them stayed together. is there enougn evidence to suppore che marriage counselor's claim at the 0.10 level of sionificance:A psychologist is interested investigating the proportion of depressed teenagers in a particular city. Using a sample of 40 teenagers, 16 were found to exhibit symptoms of depression. At ?=0.01,test the claim that more that 35% of teenagers who live in the city exhibit symptoms of depression.An organization published an article stating that in any one-year period, approximately 8.2 percent of adults in a country suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, six of them suffered from depression or a depressive illness. Conduct a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult population in the country. p' = Calculate ?x. Find the p-value.
- A poll of 700 frequent and occasional fliers found that 450 respondents favored a ban on cellphones in flight, even if technology permits it. At α = .05, can we conclude that morethan half the sampled population supports a ban?A report in LTO stated that the average age of taxis in the Philippines is 9 years. An operations manager of a large taxi company selects a sample of 40 taxis and finds the average age of the taxis is 8.2 years. The σ of the population is 2.3 years. At ? = 0.05, can it be concluded that the average age of the taxis in his company is less than the national average?In a café, the manager wishes to estimate p, the proportion of customers who will order sandwich for their lunch. Suppose 30 out of 300 customers will order sandwich for their lunch. Find the probability that more than 40 customers will order sandwich for their lunch by using a suitable approximation
- A humane society claims that less than 67% of US households own a pet. In a random sample of 600 U.S households, 390 say they own a pet. At alpha= 0.10, is there enough evidence to support the society's claim?A sample of 100 randomly selected children under the age of 12 showed that the average amount of time a child spends watching TV every day is 2.7 hours. The value of test statistic ( along with decision) to test the claim that the average time a child spends watching is greater than 2.6 hours ( assume alpha = 0.6 and alpha 0.01), is:Assume that last year in a particular state with 700000 children there were 1471 children out of 32500 in a random sample who were diagnosed with Autism Spectrum Disorder. Nationally, 1 out of 88 children are diagnosed with ASD. Is there sufficient data to show that the incident rate of ASD is higher in that state than nationally? Test at the 1% level.
