According to the IRS, individuals filing federal income tax returns prior to March 31 received an average refund of $1,072 in 2018. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15). a. A researcher suggests that a reason individuals wait until the last five days is that on average these individuals receive lower refunds than do early filers. Develop appropriate hypotheses such that rejection of Ho will support the researcher's contention. Ho: u is less than or equal to 1,072 H:u is Select your answer- b. For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $920. Based on prior experience a population standard deviation of o = $1,600 may be assumed. What is the p-value (to 4 decimals)? c. Using a = 0.05, can you conclude that the population mean refund for "last minute" filers is less than the population mean refund for early filers? - Select your answer - d. Repeat the preceding hypothesis test using the critical value approach. Using a = 0.05, what is the critical value for the test statistic (to 3 decimals)? Enter negative vakue as negative number. State the rejection rule: Reject Ho if z is Select your answer - the critical value. Using the critical value approach, can you conclude that the population mean refund for "last minute" filers is less than the population mean refund for early filers? - Select your answer -

Entity Year Life expectancy United States 1975 72.333 Saint Barthlemy 1974 66.992 Brazil 1992 67.141 Germany 1965 70.364 British Virgin Islands 2013 78.096 Belgium 2010 80.072 Moldova 1970 65.045 Namibia 1969 52.163 Jamaica 2010 74.038 Puerto Rico 2004 77.16 Mongolia 1970 55.364 Nigeria 1983 46.023 Egypt 2015 71.302 Dominican Republic 1986 65.065 Uruguay 2009 76.603 Turkey 1974 54.741 Tanzania 2019 65.456 American Samoa 1960 66.187 Palestine 1961 49.888 Reunion 1962 57.371 Gambia 1986 50.577 South Sudan 2004 51.095 Georgia 1959 63.248 Netherlands 1996 77.642 Macao 2002 80.87 Germany 1984 74.074 Cameroon 2001 51.222 United Kingdom 2014 80.978 Japan 1998 80.656 South Sudan 2009 54.219 Greenland 1980 63.063 Vietnam 1951 52.262 Singapore 1977 70.828 Israel 1983 74.755 Bangladesh 1976 49.402 United Arab Emirates 1991 72.208 United Kingdom 1992 76.111 Costa Rica 1960 60.381 Morocco 1995 66.846 Belgium 1986 74.867…

A bank developed a model for predicting the average checking and savings account balance as balance=−18,438+317×age+1,240×years education+0.108×household wealth.   a. Explain how to interpret the numbers in this model. b. Suppose that a customer is 27 years​ old, is a college graduate​ (so that years education=16​),and has a household wealth of ​$130,000.What is the predicted bank​ balance?

Consider the following chart, which shows Bitcoin values during October 1, 2020-October 1, 2021.+ Bitcoin 70,000 60,000 50,000 40,000 30,000 20,000 10,000 0 1-Oct-20 Date 1-Nov-20 13,800 Price ($) Date 29,000 19,400 Price ($) Date Marked are the following points on the chart. 1-Dec-20 ܐ 1-Jan-21 1-Feb-21 45,700 32,500 1-Oct-21 61,400 13,800 19,400 58,900 1-Mar-21 32,600 1-Apr-21 1-Jun-21 58,900 52,100 1-May-21 1-Jul-21 1-Jun-21 47,000 41,500 1-Oct-20 1-Nov-20 1-Dec-20 1-Jan-21 1-Feb-21 1-Mar-21 29,000 32,500 45,700 58,900 1-Apr-21 1-May-21 1-Jul-21 1-Aug-21 1-Sep-21 32,600 52,100 58,900 41,500 47,000 43,400 43,400 1-Sep-21 61,400 1-Aug-21 1-Oct-21 Price ($) Calculate to the nearest 0.01% your annual percentage return (assuming monthly compounding) if you had bought Bitcoin on December 1, 2020 and then sold it on June 1, 2021.