Problem: Article: Gentle play with your rabbit daily is essential to a good life. Rabbits love to knock things down, and often enjoy playing a “bowling” type game. They also like to “steal” things from you -- make sure they are taking only things that are rabbit-safe. Some rabbits also enjoy playing fetch. Think about a multi-level structure with open shelving and a fence. These are easy to create from store-bought shelving -- be sure that the holes in any open shelving are not too big for rabbit feet. Rabbits love to hide and run under things. Find a good sized box that is larger than your rabbit. Cut openings on two of the sides to make a tunnel for him/her to play in. Feed him or her a good diet with lots of fiber. Make sure he or she stays healthy -- physically examine your rabbit to make sure there is no unusual discharge, his or her teeth are fine, and to be certain the rabbit is not overweight. With proper care, feeding, and love, you can keep your house rabbit happy. Make sure he or she has clean and appropriate places to sleep, eat, and play. Enjoy your time with your delightful pet!
Summary: Play with your rabbit. Make a fun play area for your rabbit. Add a box in the rabbit's play area. Make sure your rabbit is thriving. Keep your rabbit happy.

Problem: Article: Unless you are just completing a math homework assignment, calculating relative frequency generally implies that you have some form of data. Conduct your experiment or study and collect the data. Decide how precisely you wish to report your results.  For example, suppose you are collecting data on the ages of people who attend a particular movie. You could decide to collect and report the exact age of everyone who attends. But this is likely to give you 60 or 70 different results, being every number from about 10 through 70 or 80. You may instead wish to collect data in groups, like “Under 20,” “20-29,” “30-39,” “40-49,” “50-59,” and “60 plus.” This would be a more manageable set of six data groups. As another example, a doctor might collect body temperatures of patients on a given day. In this case, just collecting whole numbers, like 97, 98, 99, might not be precise enough. It might be necessary to report data in decimals in this case. After you complete your study or experiment, you are likely to have a collection of data values that could look like 1, 2, 5, 4, 6, 4, 3, 7, 1, 5, 6, 5, 3, 4, 5, 1. In this form, the data appear almost meaningless and difficult to use. It is more helpful to sort the data in order from lowest to highest. This would result in the list 1,1,1,2,3,3,4,4,4,5,5,5,5,6,6,7. When you are sorting and rewriting your collection of data, be careful to include every point correctly. Count the data set to make sure you do not leave off any values. You can summarize the results of your data collection by creating a simple data frequency table. This is a chart with three columns that you will use for your relative frequency calculations. Label the columns as follows:   x{\displaystyle x}. This column will be filled with each value that appears in your data set. Do not repeat items. For example, if the value 4 appears several times in the list, just put 4{\displaystyle 4} under the x{\displaystyle x} column once.  n{\displaystyle n}, n(x){\displaystyle n(x)} or fr(x){\displaystyle fr(x)}. In statistics, the variable n{\displaystyle n} is conventionally used to represent the count of a particular value. You may also write n(x){\displaystyle n(x)}, which is read as “n of x,” and means the count of each x-value. A final alternative is fr(x){\displaystyle fr(x)}, which means the “frequency of x.” In this column, you will put the number of times that the value appears. For example, if the number 4 appears three times, you will place a 3 next to the number 4. Relative Frequency or P(x){\displaystyle P(x)}. This final column is where you will record the relative frequency of each data item or grouping. The label P(x){\displaystyle P(x)}, which is read “P of x,” could mean the probability of x or the percentage of x. The calculation of relative frequency appears below. This column will be used after you complete that calculation for each value of x.
Summary: Collect your data. Sort the data. Use a data table.

Problem: Article: Less than one in 1 million people may experience anaphylactic shock as a result of an allergic reaction to the MMR vaccine. Those experiencing anaphylactic shock will likely have a rash, body swelling, nausea and vomiting, and difficulty breathing. If you or your child experience any of these symptoms after receiving the vaccination see your doctor immediately. Call 911 in the United States (or emergency services in your country) if the person if having difficulty breathing, wheezing, or swelling of the lips or tongue.  While the reaction can be alarming, you can expect a full recovery if you get help right away. Medical staff who give vaccines are trained to handle anaphylaxis. Measles inclusion body encephalitis is a severe swelling of the brain that is the result of infection by the measles virus. It is a rare disorder that usually develops within a year of being exposed to the wild measles infection. There have only been three reported cases of this complication happening to people with the MMR vaccine, and only one of those identified the MMR vaccine as the cause.  Nausea, severe headaches, and blurred vision are symptoms of brain swelling. Visit your doctor immediately if you believe that you are experiencing encephalitis. Because the signs of autism are usually noticed at the same time that children are recommended to take the MMR vaccine, many people attribute the onset of autism to the vaccination. However, safety experts agree that the MMR vaccine does not cause non-autistic children to become autistic.  Many independent researchers have found that the MMR vaccine does not cause autism.  Autism is inborn, with researchers identifying signs as early as the 2nd trimester of pregnancy. You cannot control whether your child is or is not autistic. Causes of autism aren't yet clear, but genetics play a large role, and prenatal factors may also be involved.  The source of the MMR vaccine controversy stemmed from Andrew Wakefield, a man with a history of unethical behavior who was paid large amounts of money by lawyers to claim that vaccines caused autism. Wakefield's evidence of the vaccine causing autism was falsified, and his medical license was revoked.
Summary:
Report allergic reactions. Be aware that brain swelling is an extremely rare side-effect. Understand that the MMR vaccine does not cause autism.