An online survey is conducted of taxi drivers in the BC Lower Mainland regarding their COVID vaccination status. Of 80 randomly selected drivers, 73 respond "partially or fully vaccinated", 3 respond "unvaccinated", and 4 respond "prefer not to say". a) Find a 95% confidence interval for the proportion of taxi drivers in this population who declare that they are vaccinated. b) Test whether the proportion of drivers in this population who declare that they are unvaccinated is greater than 3%. Use a significance level of 5%. Be sure to include i. The null and alternative hypotheses ii. The test statistic The distribution of the test statistic under the null hypothesis The p-value The conclusion in the language of the problem ii. iv. V. C) Provide a formal interpretation of your p-value in b).

Q: Evaluation: Give at least 2 worded problems on computing sample mean and population mean when the…

A:

Q: A student wants to determine the proportion of times a spun penny will land on heads. She spins a…

A: Solution: Given that: A student wants to determine the proportion of times a spun penny will land on…

Q: A recent graduate chooses 4 continents to visit from the 7 in the world. What is the size of the…

A: A recent graduate chooses 4 continents to visit from the 7 in the world total=7 choose =4

Q: When the sample size is 15 and you are doing a t test, the number of degrees of freedom is 15. True…

A: Given that  Sample size n =15 Degree of freedom =df =n-1

Q: How do the Boundaries for the observed sample, Common and Rare Outcomes?

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Q: What term is used to explain the natural difference between a sample mean the overall population…

A: What term is used to explain the natural difference between a sample mean the overall population…

Q: isn't the sample size should be 35, not 12?

A: We have given that the information presented by the tutorial school related to the IELTS  mock…

Q: Does the sample size ? affect the mean of all possible sample means? Explain your answer.

A: According to central limit theorem, for large sample (>30) or if the population follows normal…

Q: Why do you think any serious researcher would use the sample mean to estimate for the population…

A: Generally research is carried out to determine a particularoutcome in the targeted…

Q: What do you think is the reason, why researchers prefer to get a sample from the total population…

A: A researcher can carefully design the study which to a large extent try to prevent the biases and…

Q: When we are comparing two sample means that are not the same group of individuals, what kind of test…

A: Given that  When we are comparing two sample means that are not the same group of individuals

Q: illustrates the effect of sample size on the power of a two-sample t test?

A: A test of hypothesis consists of 2 hypotheses: the null, H0, and the alternative, H1.   For a sample…

Q: What do you mean by Random Sample?

A:

Q: Q3: SPORTS A company wants to determine whether wearing a new tennis shoe improves jogging time.…

A: Given  A company wants to determine whether wearing a new tennis shoes improves jogging time.

Q: What is the difference between an outcome and sample space

A: An outcome refers to the result of a experiment . Here experiment tends to actions that can have…

Q: Explain one possible advantage of using a paired sample instead of independent samples.

A: Paired samples, are also known as dependent samples, can be defined as the samples in which natural…

Q: 2. Researchers want to find out what percent of the US labor force is female. Of the 10,000…

A: The random variable percentage of female follows binomial distribution. The sample size is 525. The…

Q: Write a short note on the importance of random sample.

A:

Q: sampling distribution?

A: The sampling distribution is a probability distribution obtained from a large number of samples with…

Q: State TWO (2) reasons why you would undertake sampling rather than a census for the proposed study

A: Sampling could be more accurate than census for the proposed study . The reasons for this are as…

Q: What is the difference between a population and a sample? a) A sample is the entire group that we…

A: Population: Population is where all the elements are included from the data set Size of the…

Q: According to the Law of Large Numbers what effect will increasing the sample size have on the sample…

A: It is given that the sample size increases.

Q: What do you understand by random sampling?

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Q: Explain the EFFECT OF SAMPLE SIZE.

A: The size of our sample defines how much information we have and thus, in part, decides our precision…

Q: how do you find the simple random sample of 15 restaurants?

A: In simple random sampling each member of the population has an equal chance of being included in the…

Q: Briefly explain how theory development might impact the selection of a sample.

A: Find: The theory development might impact the selection of a sample.

Q: find sample coefficient of variation   20.2,20.6,20.5,21.8,21.6,21.0,21.4,20.5,20.8,20.9,21.0

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Q: If we took three different samples of college students (one from California, one from Arizona, and…

A: The samples are derived of 500 students from three cities, city C, city AR and city AL.

Q: How to decide one or Two Samples?

A: t-test:  (i) In the t-test, the sample size of 30 is large enough (n < 30) (ii) Samples are taken…

Q: A population consist of numbers 3,6,9,12, and 20 and the sample size n=3 (apply the 8 steps ,upload…

A: Population Numbers are 3 6 9 12 20 From the given population samples are prepared with size 3…

Q: Discuss the sampling method that you think was used for this research

A: Four types of sampling methods: Random  : samples choosen randomly, every member of population has…

Q: You see the following headline on the news: "A new political poll finds that less than 20% of…

A: Finding of Political Poll: 20% of Americans are happy with the new Common Core standards in…

Q: How do you calculate a sample statistic and p-value (Not sure if this helps, but we are told to use…

A: We have to write formula for sample statistics and p value for hypothesis testing.

Q: Why a casual or haphazard sample doesn’t qualify as a random sample?

A: Haphazard or casual sampling is where we try to create a random sample by haphazardly or casually…

Q: Does the sample size n affect the mean of all possible sample means? Explain your answer.

A:

Q: Explain with example t Test for Two Population Means: Independent Samples (EPO Experiment).

A: Two samples are said to be independent if the sample values selected from one population are not…