Exam 11: Statistics

The graphs below display the average life expectancy for Americans according to the National Center for Health Statistics. Which graph would you show if you were arguing that we're really not living much longer than we were way, way back in 1985?

Fifty people participated in a poll to determine their favorite ice cream flavor. Use the data to construct a pie chart.

Find the range, variance, and standard deviation for the given data. The table below shows the Average points scored per game by several intramural softball teams. Round to one decimal place.

Based on data compiled by the World Health Organization, the mean systolic blood pressure in the United States is 120, the standard deviation is 16, and the pressures are normally distributed. Find The percent of individuals who have blood pressure lower than 104.

Find the area under the normal distribution curve to the right of z = -2.10.

Use the box plot to fill in all of the requested information for the test scores it illustrates.

An aptitude test has a mean of 500 and a standard deviation of 40. The test scores are normally Distributed. If 2,000 people take the test, find the number of people who will score between 490 and 574.

A researcher numbered all of the colleges willing to release grade information and chose several of Them using a random number generator. Identify the sampling method used.

Fifty ten-year-olds were monitored to determine the number of hours per week they spent watching television, surfing the net, and playing video games. The results were used to obtain the frequency distribution below. Construct a frequency polygon for the data.

Find the area under the normal distribution curve to the right of z = 1.75.

The is the value that occurs most often in a data set.

Provided below are the sizes of 15 farms, in acres, randomly selected from the state of Oregon. Find The midrange of the sample below.

The average amount customers at a certain grocery store spend yearly is $703.92. Assume the Variable is normally distributed. If the standard deviation is $99.00, find the probability that a Randomly selected customer spends between $515.82 and $892.02.

Given the following information about test scores, draw a box plot for the data.

Draw a scatter plot for the data shown.

Howard scored in the 55th percentile rank on an exam. If 400 students took the exam, how many Students scored lower than Howard?

Find 3 for the data set below.

A population consists of .

An upcoming school levy in my town would raise the property taxes on a $130,000 home from $248 per month to $280 per month. Calculate the annual increase and the percent increase, then pick which one of these numbers would most likely be publicized by an advocacy group that opposes the tax increase.

The frequency distribution below was obtained by monitoring the number of vacation days per year taken by twenty-five employees. Construct a histogram for the data.