INPUT ARTICLE: 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.


INPUT ARTICLE: Article: Contrary to popular belief, you shouldn't wash your hair every day. Instead, wash your hair every other day, or when it starts to become greasy. To wash your hair well, tun your hair under water and put a quarter-sized amount of shampoo in your hand. Gently massage the shampoo onto your scalp, but don’t scrub, because that can cause hair breakage. Then, rinse it all out of your hair.  Because the ends of your hair tend to be drier than your scalp, don’t put a lot of shampoo on them. If you struggle with frizz, try brushing your hair before showering, which can lessen frizz! Make sure you use the right shampoo and conditioner for your hair. For example, if you have oily hair, use shampoo for oily hair or normal hair. Massage conditioner on the ends of your hair, or  1 in (2.5 cm) away from your scalp. Let it set in your hair for 3 to 8 minutes, depending on its length. Set a timer after putting the conditioner in your hair, and when the timer goes off, rinse until there’s no conditioner residue falling out.  Using hair conditioner is good for your hair, but you need to choose the right kind for your hair type. If you struggle with greasy hair, avoid applying conditioner to your roots, which will make your hair even greasier. Heat creates frizzy, split ends, so don’t use a hair dryer every day if you can help it. Instead, gently towel dry your hair after you wash it.  If you do need to blow dry your hair, use a diffuser to evenly distribute the heat. Flat irons and other heated styling tools cause hair breakage, no matter how sleek they make your hair look. Overuse will burn your hair overtime. When you dry your hair with a towel, do not vigorously rub it. Instead, gently squeeze the wet parts. This will make your hair less frizzy and lessen breakage. Brush your hair in the morning to remove dust, dirt, and dead skin. Start by brushing the ends of your hair, then work your way up to the roots to prevent painful hair brushing.  Choose a natural bristle brush, because it’s less likely to pull out your hair. Use a wide-tooth comb rather than a hairbrush to untangle your hair and prevent damage. After washing your hair, massage the mask into your roots and work your way down to the tips. Use a massaging motion to allow the mask to cover all your hair, then comb through your hair with your fingers. Put a warm towel or shower cap on your head for 20 minutes, then wash the mask out.  Optionally, you can use a an anti-frizz serum after washing and drying the mask from your hair.  Read the instructions on the container before buying the mask, because some require daily use, while others are weekly.  How often you use a hair mask depends on your hair type. If you have very frizzy hair, leave the hair mask in overnight for best results. to get natural curls. To use a sea salt spray, dampen your hair and brush it with a wide-toothed comb. Make sure your hair is damp but not soaking wet, then apply the sea salt spray to the bottom half of your hair. Avoid using it on the roots which can cause frizz. Then, scrunch and twist your hair with your hands from the bottom up to create waves and curls. If you shampoo before using sea salt spray, use a moisturizing shampoo, because salt sprays dry out hair.

SUMMARY:
Wash your hair thoroughly every other day, or as needed. Condition your hair to keep it moisturized. Air dry your hair to avoid heat damage. Brush your hair regularly to keep it clean and tangle-free. Apply a hair mask once a week to hydrate and strengthen your hair. Use a sea salt spray