A research center claims that at least 23% of adults think their taxes will be audited.  A random sample of 900 adults 18% say they are concerned they will be audited. a= 0.05. Is there enough evidence to reject the claim?

You want to estimate the percentage of small incorporated businesses that are owned by women. A previous study suggests that this percentage is 34%. How many of these small businesses must be surveyed if you want 97% confidence that you sample percentage is within three percentage points of the true population percentage?

You would like to estimate the proportion of all residents in favor of a new law with 98% confidence.  It is initially believed that 30% of all residents will be in favor of the new law.  Using this information, compute the smallest number of residents that must be sampled in order for the estimate to be within 6% of the true proportion.

Samples of starting annual salaries for individuals entering the public accounting and financial planning professions follow. Annual salaries are shown in thousands of dollars. Public Accountant Financial Planner 50.2 48.0 57.8 49.2 55.3 54.1 57.2 54.9 53.2 51.9 55.0 53.6 50.9 50.7 60.5 53.9 56.0 51.8 51.9 47.9 (a) Use a 0.05 level of significance and test the hypothesis that there is no difference between the starting annual salaries of public accountants and financial planners. k State the null and alternative hypotheses. O Ho: The two populations of salaries are identical. H: The two populations of salaries are not identical. O Ho: The two populations of salaries are not identical. H: The two populations of salaries are identical. O Ho: Median salary for public accountants - Median salary for financial planners SO H Median salary for public accountants - Median salary for financial planners > 0 O Ho: Median salary for public accountants - Median salary for financial planners > 0 H:…

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Use the following information to answer the question. Studies show that since the pandemic started, screen time has increased dramatically. Below is the R output produced from the data.    If the significance level is 10%, what conclusion can you make? Group of answer choices A. We do not have enough evidence to conclude that screen time has changed since the pandemic. B. We do not have enough evidence to conclude that screen time has increased since the pandemic. C. We have enough evidence to conclude that screen time has changed since the pandemic. D. We have enough evidence to conclude that screen time has increased since the pandemic.

The preeminent basketball philosopher Rasheed Wallace popularized the phrase, "Ball don't Lie." This phrase means that if a foul was called incorrectly, the free-throw shooter is more likely to miss their shots. (We can think of this as a sort of Basketball Karma.) Due to the recent "Last Two Minute Report," we now have some data to test this claim. Of the 177 free throws awarded incorrectly, the shooter made 78.5%. Use this information to test the claim, with a .05 level of significance, that the percentage of made free throws after an incorrect foul call is less than 80%, which is the FT Percentage for an average NBA player. Round your answers to three decimal places or to the nearest tenth of a percent. (e.g. .021 or 2.1%) For credit, the hypothesis test must contain: 1) Claim in terms of the appropriate parameter (e.g. LaTeX: \mu=\:4.5\:miles) 2) Null and alternative hypothesis 3) Sample evidence used 4) Test stat (z or t) , p-value and direction of test. (right, left or…

9.) A recent survey of 2,000 Taylor Swift fans reported that the average fan paid $300 for concert ticket. Is this an example of inferential or descriptive statistics?

Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 9.79.7 million out of the 312.7312.7 million Americans suffer from sleep apnea, or approximately 3.1%3.1%. A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population’s percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.1%3.1%, a simple random sample of 406406 commercial truck drivers is examined by a medical expert, who concludes that 55 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.1%3.1%? Use a 0.050.05 level of significance.   Step 2 of 3 :   Compute the value of the…

A random telephone survey of 1,081 adults (aged 18 and older) was conducted by an online tax preparation and e-filing service. The survey results showed that 684 of those surveyed planned to file their taxes electronically. (Round your answers to the nearest whole number.) (a) Develop a descriptive statistic that can be used to estimate the percentage of all taxpayers who file electronically. % (b) The survey reported that the most frequently used method for preparing the tax return is to hire an accountant or professional tax preparer. If 60% of the people surveyed had their tax return prepared this way, how many people used an accountant or professional tax preparer? (c) Other methods that the person filing the return often used include manual preparation, use of an online tax service, and use of a software tax program. Would the data for the method for preparing the tax return be considered categorical or quantitative? O categorical O quantitative