2. A study found that 11 out of 44 randomly selected adults said they agree that toddlers should not be taken out to eat at a restaurant. It was previously believed that 30% of adults agree that toddlers should not be taken out to eat at a restaurant. Is there evidence to suggest a decrease in this rate? Use a α = 0.05 level of significance. Hypotheses: Significance Level: Calculate: • Sample Statistic: • Sample Standard Deviation: • Test Statistic: • P-Value: Conclusions

Q: Does stress affect the recall ability of police eyewitnesses? This issue was studied in an…

A: The Z-test difference of Means  to test the null hypothesis that there is no difference between the…

Q: onsider a drug testing company that provides a test for marijuana usage. Among 344 tested​…

A: The provided information is  n=344x=26α=0.01p^=xn=26344=0.075 a. The null and alternative hypothesis…

Q: In a program designed to help patients stop smoking, 203 patients were given sustained care, and…

A: Given that  In a program designed to help patients stop smoking. Patients given sustained care (n) =…

Q: A graduate student believes that people consider faces with more contrast between eye color and skin…

A: Explanation for the first part: Given a null hypothesis H0, we either conclude that there is not…

Q: 4) A retailer wants to determine if there is a significant difference in the average purchase…

A: Two different customer groups:Loyalty program ()No Loyalty program ()35284032383045293731

Q: In a recent court case it was found that during a period of 11 years 851 people were selected for…

A: Given: Number of people selected for grand jury (n) = 851 Proportion of same ethnicity in the grand…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 35%. Given the…

A: a) Denote p as the true population proportion of smokers.

Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 36 orders that were…

A:

Q: In a certain city, there are about one million eligible voters. A simple random sample of size…

A: Hypothesis :  H0 : There is relationship between gender and participation in the last election H1 :…

Q: A magazine reported that 47% of Canadians are confident they will take a winter vacation at some…

A: Given that  Sample size n =65 Favorable cases x =27 Sample proportion p^=x/n  =27/65 =0.4154 NOTE:-…

Q: Bullying Bullying is a problem at any age but especially for students aged 12 to 18. A study showed…

A: Given No. of students bullied in private school, x1=24 No. of students bullied in public school,…

Q: a program designed to help patients stop smoking, 173 patients were given sustained noking when…

A: The p-value for two tIled test and for z = 0.30 is p=0.764, which can be obtained by using the…

Q: A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the…

A: Claim : The amount of smoking is independent of seat belt use. Hypothesis : H0 : The amount of…

Q: An Office of Admission document claims that 54.7% of UVA undergraduates are female. To test this…

A: H0 : p =0.547 H1 : p ≠0.547 Population proportion = p₀ = 0.547 Sample size = n =205…

Q: According to a recent poll 53% of Americans would vote for the incumbent president.  If a random…

A: According to the given information in this question We need to apply Z test for one population…

Q: Determine whether the alternative hypothesis is supported at a 0.05 significance level.

A: From the obtained results, The test statistic is 13.20. The critical value is 1.64.

Q: Consider a drug testing company that provides a test for marijuana usage. Among 324 tested​…

A: Given that  Sample size=324 Number of subjects wrong (X)=26 Population proportion=0.10 Significance…

Q: In a certain city, there are about one million eligible voters. A simple random sample of size…

A: It is needed to test for a relationship between gender and participation in the last election.

Q: Do families and singles have the same distribution of cars? Use a level of significance of 0.05.…

A: The objective of this question is to determine whether families and singles have the same…

Q: A sample of 2010 adults were asked in 1990 whether they smoked (yes or no). This same sample was…

A: The appropriate test is chi-square test. Decision Rule: If test statistic is larger than critical…

Q: 1) A dietitian wishes to see if a person's cholesterol level will change if the diet is supplemented…

A: The given data is as follows: Subject BeforeAfter1210190220517032082104192188517817362442287211198

Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

Q: A medical research team conducted a study to test the effect of a migraine drug. Of the 400 subjects…

A:

Q: onsider a drug testing company that provides a test for marijuana usage. Among 316 tested​ subjects,…

A: Given that, x=29,n=316 The sample proportion is,

Q: According to a publication, 12.6% of 18 to 25-year-olds were users of marijuana in 2000. A recent…

A: From the provided information, 12.6% of 18 to 25 years old were users of marijuana in 2000 that is p…

Q: A University considers direct contact for donations from alumni cost effective if more than 15% of…

A:

Q: ople who smoke are less concerned about their health and safety and are therefore less inclined to…

A: Given:-

Q: A health psychologist was interested in people's weight-reduction strategies. Of the 56 participants…

A: The degrees of freedom is, The degrees of freedom is 3. The significance level is 0.05. The…

Q: The student population at the state college consists of equal females and males. A researcher…

A: Given, Number of females =385 Number of males =215 Level of significance α=0.05 Critical value…

Q: According to a​ publication, 13.9​% of 18 to 25-year-olds were users of marijuana in 2000. A recent…

A: State the hypotheses. That is, there is no sufficient evidence to conclude that the percentage of…

Q: A recent report from the Pew Research Center indicates that even teens think they have a problem…

A: For teenage girlssample size(n1)=365x1=171For  teenage boyssample size(n2)=378x2=132significance…

Q: ​Historically, the percentage of residents of a certain country who support stricter gun control…

A: Given Data

Q: Consider a drug testing company that provides a test for marijuana usage. Among 253 tested subjects,…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.