Suzette, a dental assistant, would like to test the claim that the number of cavities of incoming patients at a doctor's office is more than 3 cavities on average. She decides to complete a hypothesis test at a 2.5% significance level. She samples 31 incoming dental patients, and determines the sample number of cavities to be 3.3 cavities on average with a sample standard deviation s=0.8 cavities.   Work through the testing procedure and interpret the results of the hypothesis test.

Q: 2. Researchers wanted to compare the effectiveness of three diet plans. 78 subjects were randomly…

A: VariableDietSample sizeMeanSt DevWeight LossA242.8831.507B273.0262.523C275.1482.396

Q: A poll was conducted to investigate opinions about global warming. The respondents who answered yes…

A:

Q: Estimate the chance that the sample proportion was more than 45% using a normal approximation.

A: Given information: Given that , 40 % of the primary doctors have made claim that their patients…

Q: Suppose you select a random sample of N=81, and find X = 50, and s = 9.9. Determine the 99%…

A: Given Mean=50 Standard deviations=9.9 n=81

Q: find the sample size needed to estimate the percentage of democrats who have tattoos. Use a 0.05…

A:

Q: Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of…

A: n = 20 x¯ = 101.52y¯ = 101.1r = 0.850p value = 0.000regression equation : y^ = 8.69+0.91xfor x = 90…

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: In 2011, a U.S. Census report determined that 62% of college students are working students. A…

A: The given values are:Proportion of working students according to the U.S. Census report,…

Q: find the margin of error for a sample mean, given n=16, s=4, Xbar=17. for a 95% confidence interval.

A: The margin of error for sample mean is given by,

Q: You are told that a survey produced a 90% confidence interval for the mean spent on utilities per…

A:

Q: If n = 330 and X = 264, construct a 95% confidence interval for the population proportion, p.

A: Ans#- From the provided information, Confidence level = 95% Sample size (n) = 330, x = 264 Sample…

Q: The number of successes and the sample size are given for a simple random sample from a population.…

A: Obtain the value of sample proportion. The value of sample proportion is obtained below: From the…

Q: Emma wants to estimate the percentage of people who use public transportation in a city. She surveys…

A: Obtain the margin of error. The margin of error is obtained below: The formula for the margin of…

Q: Select the most appropriate response. Five years ago, a survey found that the proportion of city…

A: Solution:  The null and alternative hypotheses are:

Q: 2. (Table: TV and Aggressiveness) In a fictional study, a pretest-posttest design was used to…

A: The data for the number of aggressive responses before and after the television show is given with…

Q: A professor wants to determine if the time of day that a class is held has any impact on exam…

A: We know that, significance level shows the probability that test will produce significant result.…

Q: Decide whether the following scenarios are example of type 1 error or type 2 error or neither? Use…

A: Explanation: The investigator is specifically interested to test whether the mean weight of babies…

Q: IOF 20 Fandomly selected sets of siblings. The 20 pairs of measurements yield x = 98.55, y= 96.1,…

A: Given y = 1.09 +0.96x, where x represents the IQ score of the younger child. x= 102 Use a…

Q: Scott wants to find a 95% confidence interval for the average GPA for Allegany College of Maryland…

A:

Q: elevision sports commentator wants to estimate the proportion of Americans who follow professional…

A:

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: The US Department of Energy reported that 51% of homes were heated by natural gas. A random sämple…

A:

Q: The accompanying data set includes volumes (ounces) of a sample of cans of regular Coke. The summary…

A:

Q: Suppose you want to test the claim that a population mean equals 38.  State the null hypothesis.

A: Given that, Claim: population mean equals 38.

Q: 879, P-vaIue Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs…

A: For the best predicted value, first we will see whether the two variables (x and y) are…

Q: Provide a scenario for which you would use an independent sample t test. Also, explain in your own…

A: Introduction :-  Here we have to explain  Condition where independent sample t test can be applied…

Q: f n=300 and x=60, construct a 99% confidence interval estimate for the population proportion.

A: n=300 and x=60, construct a 99% confidence interval

Q: Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of…

A:

Q: A business has just completed a marketing campaign. They want to determine if their original market…

A: As per guidelines, we will answer first three subparts. Given information: p=0.50x=81n=150

Q: Assume that the population has a normal distribution. Thirty randomly selected students took the…

A:

Q: Past surveys showed that 44.2% of Filipino households have pets. A recent survey reported that 516…

A: Given: x = 512 n =1200 p= 44.2% = 0.442

Q: Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of…

A: Given that the regression equation is, y^=-14.65+1.16x Here, x=IQ score of the wife

Q: Choose the correct answer. If the P-value of a test of significance is 0.999 then: A. the null…

A: If the P-value of a test of significance is 0.999 then:A. the null hypothesis should be rejected.B.…

Q: Women athletes at UČLA have a long-term graduation rate of 96%. Over the past several years, a…

A: We have given that  Sample size n= 40 Favorable cases x = 37 Sample proportion p^=x/n…

Q: proportion of homes in Oregon that were heated by natural gas is different than what the DOE…

A: Given data number of success , x= 132 sample size, n =331 population proportion,p= 0.48…

Q: he standard deviation and the mean of 25 students scores are 10 and 38, respectively. Construct a…

A: Given that  Sample size (n) = 25 Mean (x¯) = 38 Standard deviation (s) = 10 Confidence level (C) =…

Q: Make the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2…

A: Given that Sample size n = 10000 Number of deaths due to lung cancer, X = 6 Level of significance =…

Q: IQ tests are approximately normally distributed with a mean of 100 for adults. A tech company CEO…

A: Solution: Here, the hypothesis test is to be conducted if the average IQ of employees at high-tech…

Q: find tc for a 95% confidence level when the sample size is 6.

A: level of significance, alpha = 0.05from standard normal table, two tailed t alpha/2 with n-1 = 6 d.f…

Q: Kenneth, a competitor in cup stacking, claims that his average stacking time is 8.2 seconds. During…

A: Note:The given calculated values can be used to draw the conclusion.

Q: Find the sample size need to find the Population Proportion if the margin of error is 4%, the…

A:

Q: a. Assume that nothing is known about the percentage to be estimated. n= 1068 (Round up to the…

A:

Q: A chemist measures the haptoglobin concentrations (in grams per liter) in the blood of eight healthy…

A:

Q: If your target population is 123, how many samples do you need for a sampling error of .05 and a…

A: