In 2002, NCHS reported that 75% of children age 2-17 saw a dentist in the past year. An investigator in Boston decided to assess the dental services for children in that area. A sample of 125 children age 2-17 were surveyed and 64 reported seeing a dentist. Assuming that the sample size is adequate, use the five-step hypothesis testing procedure to determine if there is a significant difference in the proportion of children living in Boston who use dental services as compared to the national proportion.

Q: Researchers at Purdue University and Wichita State University found that airlines are doing a better…

A: From the given information, a) The hypotheses that can be used to test for a difference between…

Q: A food services manager wants to know if there is a relationship between gender (male or female) and…

A: 1.   It is needed to test, whether the there is a relationship between gender (male or female) and…

Q: Report the test statistic. Round your answer to TWO decimal places.  You may use the observed…

A: It is given that  Favourable cases, x = 777 Sample size, n = 2101 Population proportion, p = 34.5% =…

Q: The National Highway Traffic Safety Administration requires each U.S. state to carry out an…

A: The objective is to find the required probabilities.

Q: The General Social Survey determined in 2016 that 57% of US Residents think that the use of…

A:

Q: esearchers wish to test whether marijuana use among full-time college students aged 19-22 at a local…

A: 1)The appropriate null and alternative hypothesis is stated below:From the given information, the…

Q: In a survey of 1,000 women aged 22 to 35 who work full time, 555 indicated that they would be…

A: A survey of 1,000 women aged 22 to 35 who work full time were considered in which 555 indicated that…

Q: According to the Center for Disease Control website, in 2011 at least 18% of high school students…

A: Given : Claim : the local high school’s percentage was lower.

Q: We estimated a model relating number of campus crimes to student enrollment for a sample of…

A:

Q: According to a report on consumer fraud and identity theft, 24% of all complaints for a year were…

A: given data, claim:p>0.24x=857n=3401α=0.05we have to complete hypothesis for the given data,

Q: A study of US residents is conducted to assess the relationship between gender and if they have…

A: Test is that whether there is relationship between gender and if they have cardiomyopathy.

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: The College Board provided comparisons of Scholastic Aptitude Test (SAT) scores based on the highest…

A: Given data represents the SAT math test scores for a sample of students whose parents are college…

Q: In the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect…

A: It was stated that in the NFL, Coaches can throw "challenge" flags if they believe officials have…

Q: is it a cluster sample

A: Cluster Sampling: A heterogeneous population is divided into homogeneous groups and which is used…

Q: Of the 328 patients that completed the survey last year, 211 of them claimed to be returning…

A: The objective of the question is to identify the type of observational study conducted based on the…

Q: Identify whether the studies described here are based on single samples, paired samples, or…

A:

Q: In June 2012 the Gallup organization conducted a poll using a random sample of 1004 adults, aged 18…

A: Given that, p^ = 66% = 0.66 Margin of error (E) = 0.04

Q: er level of education would on average score higher on the SAT. SAT math scores for independent…

A: The SAT math test scores for students whose parents are college graduates with a bachelor’s degree…

Q: According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher…

A: Given that,possible chances (x)=276sample size(n)=400success rate ( p )= x/n = 0.69success…

Q: A nonprofit company concerned with the school dropout rates has designed a tutoring program aimed at…

A:

Q: A credit score is used by credit agencies​ (such as mortgage companies and​ banks) to assess the…

A: Given, sample mean, x-bar is 724.4. Population mean, µ is 705.6. Sample standard deviation, s =…

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: Null hypothesis is the hypothesis of no difference. Alternative hypothesis is the claim being made…

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A: The summary of the statistics is, The type of test is right tailed test

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Q: The researchers hypothesised that people who receive an audiovisual presentation will have a…

A: In the given case we can use an appropriate measure of recall like the number of visual elements…

Q: A researcher wished to gauge public opinion on gun control. He randomly selected 1000people from…

A: The aim of the researcher was to gauge public opinion on gun control. In statistics, one can hear…

Q: he state highway department is studying traffic patterns on one of the busiest highways in the…

A: Step 1: State the hypotheses The null and alternative hypotheses are ​​​​​​​   Step 2: Find…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.