The average charitable contribution itemized per income tax return in a certain state is $792. Suppose that the distribution of contributions is normal with a standard deviation of $103. Find the limits for the middle 68% of contributions. Round z-value calculations and final answers to 2 decimal places. The lower and upper limits for the middle 68% of contributions are respectively $ —- and $—-

Listed are the net sales for a San Francisco–area mail-order retailer for the years 2009 to 2018. Use the mean sales for the earliest three years to determine a base and then find the index for 2017 and 2018. (Round your answers to 1 decimal place.) By how much have net sales increased from the base period? (Round your answers to 1 decimal place.)

The Consumer Price Index is reported monthly by the U.S. Bureau of Labor Statistics. It reports the charge in prices for a market basket of goods from one period to another. The index for 2010 was 213.967. BY 2017, it increased to 239.051 What was the geometric mean annual increase for the period? ( Round your answer to 1 decimal)

Approximately 1.4% is not correct

The production of hybrid cars increased from $3.94 million in 2003 to $6.93 million in 2013. Calculate the average annual percent growth in the production of hybrid cars (use the geometric mean concept). Express your answer as a percentage rounded to two (2) decimal places.

A high school senior uses the Internet to get information on February temperatures in the town where​ he'll be going to college. He finds a website with some​ statistics, but they are given in degrees Celsius. The conversion formula is °F=95°C+32. Determine the Fahrenheit equivalents for the summary information below.   Maximum temperature = 12°C Median = 0°C Standard deviation = 5°C Mean = −1°C Range = 27°C IQR = 15°C   what is the IQR, range, and standard deviation

Find the z score for the 55th percentile.

Ocho

The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 312 yards. The probability the golf ball travels further than 319 yards is 0.28. Find the probability a randomly selected golf ball travels between 305 yards and 319 yards. Express the answer as a decimal value rounded to the nearest hundredth.