a researcher claims that 85% of Americans think there are unlikely to contract the zika virus in a random sample of 250 Americans 225 think that they're unlikely to contract the Zika virus. At x=0.05 is there enough evidence to reject the researcher's claim?

Q: A medical researcher says that less than 77% of adults in a certain country think that healthy…

A: Given information Claim: - Less than 77% of Adults in a certain country think that healthy children…

Q: A psychologist wants to determine the effect of instructions on the time required to solve a…

A: Equal variances: Effect size=Mean differenceStandard error difference=6.83.15806 [From the output]…

Q: Doctors nationally believe that 78% of a certain type of operation are successful. In a particular…

A: Introduction: Denote p as the true national proportion of operations that are successful. As it is…

Q: A medical researcher says that less than 77​% of adults in a certain country think that healthy…

A: Given Inormation: Population proportion (p) = 0.77  Sample proportion (px) = 0.74  Sample size (n) =…

Q: A physician wants to test if temperature has an effect on heart rate. In order to do this, she…

A: In this question, it has been given,Test Statistics = 5.627Level of significance = 0.05Rejection…

Q: At any age, about 20% of American adults participate in fitness activities at least twice a week.…

A: Given Information: About 20% of American adults participate in fitness activities at least twice a…

Q: A medical researcher says that less than 82% of adults in a certain country think that healthy…

A: Given that  A medical researcher says that less than 82% of the adults in certain country thinks…

Q: A researcher is interested in conducting an observational study looking at the incidence of breast…

A:

Q: A medical researcher says that less than 82% of adults in a certain country think that healthy…

A:

Q: At 5yrs old 10 of 307 children in the peanut butter group who ate were allergic and 55 of 321in the…

A: Given that  At 5yrs old 10 of 307 children in the peanut butter group who ate were allergic and 55…

Q: A physicist claims that the average wind speed in a certain city is 8 miles per hour. A sample of 33…

A: We have given that Population mean (µ) = 8Population Standard deviations (σ) = 0.6Sample size (n) =…

Q: According to a newspaper study of more than 1 million medical dispatches from 2007 to 2012, the 911…

A:

Q: A national study found that treating people appropriately for high blood pressure reduced their…

A: Previous situation: Hypertensives who do not know they have high blood pressure = 50%. Therefore,…

Q: An experiment is conducted to determine how many heavy duty clocks will survive for a 24-hour period…

A: Binomial distribution is discrete distribution that deals with the probabilities of success and…

Q: What is the purpose of testing whether β1=0? If we reject β1=0 does it imply a good fit?

A: β1 is the slope in a regression model.

Q: In the general population, Democrats are estimated to have an average mental health index score of…

A: The summary statistics of mental health index for the general population is mentioned in the table.…

Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…

A:

Q: A physician wants to test if temperature has an effect on heart rate. In order to do this, she…

A: Solution:From the given information, test statistic value is 5.627 and degrees of freedom is 10.The…

Q: A recent study compared the heart rates of 19 infants born to non smoking mothers with those of 17…

A: Confounding: In a study, confounding occurs when the apparent relationship between an explanatory…

Q: A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27…

A: We want to find the Zcritical

Q: In a random sample of 80 Americans, 45 wished that they were rich. In a random sample of 90…

A:

Q: A medical researcher says that less than 88% of adults in a certain country think that healthy…

A: (a) Claim:B. Less than 88% of adults in the country think that healthy children should be required…

Q: A recent study indicated that 27% of the 100 women over age 55 in the study were windows. How large…

A: Given Information: A recent study indicated that 27% of the 100 women over age 55 in the study were…

Q: A nutritionist claims that the proportion of females who consume too much saturated fat is lower…

A:

Q: According to a recent Pew Research poll, 77% of Americans say that the u.s economic system unfairly…

A:

Q: Since the z-score in freestyle is [ Select ] O than the z- score in backstroke, his time in…

A:

Q: A chemical to extend the life of a car battery was invented by a researcher. If the average lifetime…

A: alternative hypothesis will be

Q: The average American consumes 9.4 liters of alcohol peryear. Does the average college student…

A: Given data, Mean μ=9.4

Q: Makers of a new pain-relieving medication claim that it relieves chronic pain faster than the…

A: Given that

Q: A company makes electronic gadgets. one out of every 50 gadgets is faulty, but the company doesn't…

A: Number of gadgets (n) = 50 Number of faulty gadgets = 1 Probability of getting a faulty gadget…

Q: clinical​ trial, 29 out of 853 patients taking a prescription drug daily complained of flulike…

A: The null and alternative hypotheses are: Ho: p = 0.029Ho:p=0.029 Ha: p > 0.029Ha:p>0.029…

Q: recent poll showed that 61% of adult Americans are comfortable with the legalization of marijuana,…

A: A recent poll showed that 61% of adults Americans are comfortable with the legalization of…

Q: A poll in 2017 reported that 699 out of 1027 adults in a certain country believe that marijuana…

A: Given Information: Sample size (n) = 1027 X = 699 Sample proportion is given by the formula:…

Q: The 2019-2020 flu season was especially tough.  By the end of the season, an estimated total of 49…

A: US population during 2019-2020 300,000,000 The population contracted the flu 49000000 Population…

Q: A random sample of 100 students at a high school was asked whether they would ask their father or…

A: H0: p1 = p2H1: p1 ≠ p2

Q: A research center claims that 26% of adults in a certain country would travel into space on a…

A:

Q: Since the z-score in freestyle is [Select] than the z- score in backstroke, his time in freestyle is…

A: here use basic of z-score  z-score = x- μσ

Q: A study done in 1997 showed that 4.2% of mothers smoked cigarettes during their pregnancy. An…

A: Given Data: p^=10/200=0.05n=200   Null and Alternate Hypothesis: H0: p=0.042 Ha: p>0.042

Q: The 2019-2020 flu season was especially tough.By the end of the season, an estimated total of 49…

A: Please find the solution below. Thank you

Q: A citrus grower anticipates a profit of $100,000 this year if the nightly temperatures remain mild.…

A: Let X be the random variable having a profit which grows when he doesnot care about the fruitsProfit…

Q: In a winter with a flu epidemic, a well-known pharmaceutical company studied 2,000 babies to…

A:

Q: A medical researcher says that less than 82% of adults in a certain country think that healthy…

A: Given  Hypothesis  Ho: p≥0.82 vs H1: p<0.82 (left tailed) Zo=-1.28

Q: A sample of patients is tested to determine if they have any hospital borne infections. How large of…

A: The random variable X follows normal distribution. We have to find the sample size. This is z-test…

Q: An experiment was designed to compare the lengths of time that four different drugs provided pain…

A: Test hypotheses: There are 4 types of old drugs. Denote the true average time of each of the 4 drugs…

Q: A researcher selected a sample of 268 former student-athletes from a list of graduates of a large…

A: Population proportion = p₀ = 0.17   Sample size = n =268 Sample proportion = p̂ =  0.14

Q: After testing 40 participants, a significant x2obt of 13.31 was obtained. With a  .05 and df  2,…

A: It is given that, N = 40, α = 0.05 and df = 2. The obtained chi-square value is 13.31.

Q: For a hypothesis test of the claim that the mean amount of sleep for adults is less than 7 hours,…

A: The power of the test is 0.4033 and the claim is μ<7 hours of sleep when the actual mean is 5.5…