Answer:
So we expect about 5 people with the disease in the random sample.
Explanation:
Previous concepts
The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
Solution to the problem
For this case we can assume that our random variable who represent the number of students that develop the disease is distributed on this way
And from definition the expected value is given by:
And the variance is given by:
And the deviation is given by:
So we expect about 5 people with the disease in the random sample.
Volleyball is considered a good aerobic exercise because you’re on your feet while playing, you’re working the same large muscle groups for more than 20-minute intervals and you have the opportunity to maintain 60 to 80 percent of your target heart rate.
Answer:
Explanation:
Water is essential to most bodily functions.
The body has no way to store water and needs fresh supplies every day.
The best source of fluids is fresh tap water.
A child will need different amounts of fluid, depending on their age and gender.
Women should have about 2 litres (8 cups) of fluids a day, and men about 2.6 litres (10 cups).
Women who are pregnant or breastfeeding need more fluid each day than other women.
Dehydration can happen when the body’s fluids are low. It can be life threatening, especially to babies, children and the elderly.
Answer:
anyone over 21 years of age