A Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15 and older suggests that 30% smoke regularly or occasionally. The following is also noted "one can say with 95% confidence that the maximum margin of sampling error is 2.4 percentage points". Which of the following is true based on the results of this survey? We are 95% confident that 27.6 % to 32.4 % of all Chinese adults smoke.   We are 95% confident that 25.2% to 34.8% of all Chinese adults smoke.   If the sample size was larger, the margin of error would be larger as well.

Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…

A: Given: Sample size,n= 76 Number of students who have jobs,x= 35  Level of significance=0.05

Q: testing in this problem? mean proportion What is the level of significance? e the null and alternate…

A: Given:p_0=35%=0.35 As the population proportion is given, thus we are testing the single…

Q: below miarzes data from a survey o sample of women. Osing 01 significance level, and assuming that…

A: We want to find the test statistic

Q: Determine the sample mean ?̅ and sample variance ?2 of this dataset. 2.The president of the company…

A: Given: n = 8 Formula Used: Sample Mean X = ∑i=1nXin Sample Variance S2 = ∑(Xi-X)2n-1 Median =…

Q: A random sample of 1020 heads of households was taken from a customer list for a bank. The…

A: Chi-square Statistic is given by, Chi-square= summation (Oi-Ei)2/Ei Where Oi's are observed values…

Q: There are 7360 tigers worldwide and the state of Texas has approximately 3861 tigers in captivity.…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: student decides to spin a dime and determine the proportion of times it lands on heads. The student…

A: We have given that  Sample size n = 25 Favorable cases x =17 Population proportion p =0.5

Q: 3. Here are three confidence intervals for a proportion, all resulting from the same dataset: (0.83,…

A: Basics: As we know that the confidence level increases  the critical value also increases,  due to…

Q: Which of the following methods helps reduce sampling bias? O a. Take a random sample from a…

A: It is needed to find the method that reduces sampling bias.

Q: . When an accurate and complete list of the population is not available, a sampling will suffer…

A: We want to tell you, which one is the correct choice.

Q: Given the sample 2, 19, 6, −2, add one more sample value that will neither change the mean nor the…

A: Given data The sample is 2, 19 , 6 , -2

Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance​…

A: Chi-square test goodness of fit

Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance level,…

A: Steps to find the test statistic. The calculations have been done in EXCEL. Denote oij as the…

Q: A survey was conducted to determine whether adult participation in physical fitness programs varies…

A: State the hypotheses. Null hypothesis: Alternative hypothesis: Correct option: Option 1.

Q: 1. In a survey, 957 internet users chose to respond to this question posted on ratemyprofessors.com:…

A: Part a: It is an observational study. (This is observations regarding the current scenario and not…

Q: 1. From a sample of a thousand people the mean wage is  $15 an hour and the sample variance is 81.…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance​…

A: Here it is needed to test, whether the proportions of​ agree/disagree responses are the same for…

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Q3. Paired sample t test can be used in an analysis involving pre-test and post-test data or in…

A: Paired sample t test is used under following assumptions: 1) sample sizes are equal. 2) The two…

Q: A national study report indicated that 20.5% of Americans were identified as having medical bill…

A: Given: n= 400 ,x= 95.0 p= 0.205 p̂= 95 / 400

Q: State whether each situation has independent or paired (dependent) samples. a A researcher wants to…

A: Solution: (a):Independent samples (b):Independent samples  Explanation: There are two different…

Q: organization monitors many aspects of elementary and secondary education nationwide. Their 2000…

A: It is given that the statement about to the null and alternative hypotheses.

Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance​…

A: Here it is needed to test, whether the proportions of​ agree/disagree responses are the same for…

Q: a. 14.0, 16.3, 18.7, 19.9, 21.3       b. 16.1, 13.4, 13.6, 14.9, 14.1, 10.5 Construct the 95%…

A:

Q: n this social networking site differ by gender? The following sample data show the number of women…

A:

Q: Income Tax and the IRS. In 2010, the Internal Revenue Service (IRS) sampled 308,946 tax returns to…

A: a)Sampling error:When a sample is used to estimate a population characteristic the error resulting…

Q: When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume…

A: 2 births are randomly chosen, hence, the possible births are b,b, b,g, g,b, g,g. Prob. of having a…

Q: What is the value of SS for the following sample?  1,3,2,2?

A: Given, the sample 1,3,2,2 Thus n=4 The mean of the sample is obtained as- x=1+3+2+24=84=2