Last year, the proportion of tax filers that received a refund was 25%. An accountant believes this upcoming tax year will have a smaller proportion of tax refunds than the proportion from last year. Interested in studying this further, the accountant samples a few of their clients and determines the proportion that receive a refund for this upcoming tax year is 19%. As the accountant sets up a hypothesis test to determine if their belief about this upcoming tax year is correct, what is the accountant's claim?

Q: ABC Inc., with the province-wide operation for 15 years, is estimated to have about 12.5% the market…

A: Given that,sample size(n)=650success rate ( p )= x/n = 0.158success probability,( po )=0.125failure…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Given, The sample proportion is,

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: From the provided information, Sample size (n) = 58 From which 28 went up. Level of significance (α)…

Q: An insurance company offers four different deductible levels-none, low, medium, and high-for its…

A: Thank you for the question. As per the honor code, we are allowed to answer three sub-parts at a…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Given : Sample size : n=76 Number of successes : x=21 We are conducting a study if the proportion of…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A:

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: It is assumed that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same…

Q: A recent study indicated that 67% of U.S. adults consider air conditioning a necessity. If a random…

A:

Q: A big private oil company must decide whether to drill in the Gulf of Mexico. It costs $1 million…

A: Let's delve deeper into the decision-making process of the oil company, exploring the intricacies of…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: From the provided information,

Q: Does the proportion of Democrats who support Medicare for all appear to be substantially different…

A: The hypothesized proportion is 0.70.

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: The z test are used to compare the proportion of sample and population. The sample proportion is…

Q: The data for an independent –measures research study produced a sample mean difference of 6 points…

A: Following information is given:

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: From the provided information, The hypotheses can be constructed as: H0: p = 0.30 H1: p > 0.30…

Q: As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the…

A: For the given situation, Null Hypothesis: H0: The proportion of stocks that went up is not…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: It is required to test  if the proportion of stocks that went is greater than 0.3 or not. So, the…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.3 Alternative hypothesis:…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Here α=0.002 n=54 x=19

Q: Online Tax Returns. According to the Internal Revenue Service, among people entitled to tax refunds,…

A: It is given that:

Q: One of the biggest issues facing e-retailers is the ability to turn browsers into buyers. This is…

A: Using  z test for single proportion  test.

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Given Null Hypothesis Ho : p = 0.30Alternate Hypothesis Ha : p < 0.30Sample size n = 78Number of…

Q: A Morning Consult/Politico poll of 1997 registered voters in July 2020 asked a standard polling…

A: The given margin of error is 0.019.

Q: relationship between the size of the offering and the price per share.

A: We have Given Shah Rukh Khan is studying companies going public for the first time. He is…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Given x=29 n=80

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Solution: State the hypotheses Null hypothesis: That is, the proportion of stocks that went up is…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Given : The null and Hypothesis are states as Ho: p=0.3 vs Ha: p<0.3 Significance level α=0.002…

Q: The Harriet Hotel in downtown Boston has 100 rooms that rent for $150 per night. It costs the hotel…

A: Given information:Available number of rooms in hotel = 100Rent of room per night = $150Variable…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Givensample size(n)=64x=12significance level(α)=0.02sample proportion(p^)=xn=1264=0.1875

Q: Find another classmate’s initial post and write down the margin of error that they calculated. You…

A:

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: The test statistic for this sample is, Thus, the test statistic is 1.022.

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A:

Q: What is the test statistic for this sample? (Report answer accurate to three decimal places.) test…

A: Given that  p = 0.3 , n = 77 , x = 26

Q: A public opinion organization wants to know if opinions on gun control laws have changed over time.…

A: Given that, a poll conducted in 2006 found that 55% of people favored stricter gun laws.

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A:

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: Solution: Given information: n= 51 Sample size of stocks  x= 8 stocks went up  p^=xn=851=0.1569…

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A: Here the proportion of people liking dark chocolate is 37% with a margin of error 2.5%  So, the…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A: From the provided information, Sample size (n) = 78 Out of which 26 went up. Level of significance…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A:

Q: An insurance company offers four different deductible levels—none, low, medium, and high—for its…

A: Given ,  deductible levels for homeowner's policyholders - none(N), low(L), medium(M), and high(H)…

Q: An insurance company offers four different deductible levels-none, low, medium, and high-for its…

A: