At a local brokerage firm, the following distribution describes the number of individual stocks that are held in accounts with account values under $20,000: 17% of these accounts hold 1 stocks, 21% of these accounts hold 3 stocks, 20% of these accounts hold 7 stocks, and the remaining accounts hold 9 stocks. What is the average number (expected value) of individual stocks held in accounts under $20,000 in value? (please express your answer using 2 decimal places

Answer the following questions using the separate rates X1,..., X20 and Y1,..., Y20 shown in Figure 1. (a) Carry out the calculations for a test of the hypotheses that the mean U.S. mortality rate On remained the same or increased from 2005 to 2015 against the alternative that the mean mortality rate decreased. State the hypotheses, test statistic, rejection region, and p-value. Do not interpret the conclusion of the test. (b) Compute a 99% confidence interval for the change in mean heart rate mortality. Do not interpret the interval.

The table below shows the share of income going to each quintile of the income distribution for Neverland in 1980 and 1990. Complete the table below finding the the cumulative share of income for 1980 and 1990 and answer the following: Share of income in Cumulative share of Share of income in Cumulative share of Quintiles 1980 income in 1980 1990 income in 1990 1st 7% 6.6.% 2nd 11.5% 11.5% 3rd 17% 16.3% 4th 24.8% 22.7% 5th 39.7% 42.9% a) Sketch the Perfect Equality line and the Lorenz curve for 1980 and for 1990. Don't forget to label your graph and your curves! b) According to the Lorenz curves that you draw in (a), which year had worse income inequality, 1980 or 1990? JUSTIFY your answer! NOTE: This is a file upload question. Work your answer in a piece of paper, take a picture and upload your file.

Kelly’s batting average is .30 (they hit 3 out of every 10 pitches). Let’s assume there are 120 pitches thrown in the first 8 games. !. There is a 70% chance they should hit at least how many pitches this season? Round down for this answer.

A certain basketball team makes 70% of its free throws on average. In a game where the team shoots 40 free throws. what is the approximate probabillity that the number of free throws made by the team wilbe at least 25%

You pay $20 to enter a raffle.  The first ticket drawn wins $1036, the second ticket drawn wins $477, the third through fifth win $186, and the sixth through tenth win $49.  Suppose 2345 tickets were sold.  What is the expected earning on your ticket?

The number of employees working for Fly Me to the Moon Airlines in 2005 was 16,633, with an expected decrease of 4.4%4.4% per year. At the rate of decrease given, what is the expected number of employees working at Fly Me to the Moon Airlines in 2006? Round your answer to the nearest integer.

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 1 of 2: Suppose a sample of 281 tenth graders is drawn. Of the students sampled, 56 read at or below the eighth grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.

Community Hospital began the year 2019, a non-leapyear, with 102 beds. By March 1st, it had expanded the number of beds to 116. In April through June, the hospitalreported 120 beds, which increased to 124 beds in Julythrough October. Finally, the hospital completed itsexpansion process in November to end the year with 130beds. Use these data to answer the questions below. Roundto one decimal place.(i) Calculate the percentage of occupancy for each month.(ii) Calculate the percentage of occupancy for each quarter(January through March, April through June, July throughSeptember, and October through December).(iii) Calculate the percentage of occupancy for the year.

The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A Bank B 6.4 4.2 6.6 5.4 6.7 5.7 < 6.8 6.2 7.1 6.7 Click the icon to view the table of Chi-Square critical values. 7.3 7.7 7.5 7.7 Construct a 95% confidence interval for the population standard deviation o at Bank A. min < Bank A min (Round to two decimal places as needed.) 7.9 8.5 7.9 9.3 7.9 10.0 Question Viewer ho