Get answers from academic experts to any study-related questions.
Prior probability is the estimated probability of the state of affairs before a practical survey is conducted to acquire relevant details. This is usually a conclusion based on past events. For instance, Peter passed the test (A) last year; therefore, the probability P (Pc) he will pass test C is...
In plain terms, “statistics” is the general term that stands for a variety of numeric data with which the general public, the media and researchers across various disciplines grapple with phenomena or attempt to put perspective on comparisons of two or more elements. A teacher wanting to impress students with...
Modal logic is an extension of formal logic that allows reasoning about certainties and possibilities. In comparison with classical logic, modal one considers that things may not always be as they are at that moment. For example, one may use modal logic by saying, “although the sun is usually yellow,...
De Morgan’s Laws are a pair of transformation logical rules and are an example of mathematical duality. They can be expressed as: the negation of a disjunction is the conjunction of the negations while the negation of a conjunction is the disjunction of the negations.
If a two-player strategy game is ultra-weak solved, it means determining the outcome (win, lose, or draw) if both players play perfectly. A weakly solved game implies an algorithm that means either win or draw, providing that the opponent can make all the possible moves. Solving a game in a...
The margin of error shows how accurate one expects the value of the unknown parameter to be. The margin of error of the given confidence interval is equal to ± 0.52 inches. This means that the value of ± 0.52 inches is the maximum amount by which the sample results...
In order to shorten the length of the confidence interval by half without changing the confidence level, the value of (σ / (number of samples0.5)) should be halved. Given that σ is the constant value, the number of samples needs to be increased, so that (new number of samples0.5) /...
Since z* is equal to 1.282 for the 80% confidence interval, the 80% confidence interval of the mean of the volume is 12.1 ± 1.282 × (0.24 / (36 0.5)) = 12.1 ± 0.05128. It can be stated that the calculated interval is smaller than the 90% confidence interval, with...
Given that income distribution in Utica is normal, it is possible to use Table A to estimate the probability that a single randomly chosen Utica household will have an income of less than $52,500. This is because the value of $52,500 can be standardized, and the cumulative proportion for the...
In order to use Table A, a standardized amount of money spent by shoppers should be calculated. For a shopper who spends $47 during one visit to Wainwright’s, this standardized amount of money equals z = (47 – 50) / 10 = -0.3. The cumulative proportion for z is 0.3821....
The Central Limit Theorem is a profound concept in statistics that makes statistically significant inferences about the general population based on samples. For example, a variable has a normal distribution (or any other type of distribution). One repeatedly takes samples from this general population and calculates the mean of each...
The name of the store and the following example of a survey were invented by the author. Kaufmann’s is a large department store that offers expensive clothing for high-income customers, both men and women. A limited collection of jewelry was launched for the first time, and a survey was designed...
In order to demonstrate the example when correlation does not imply causation, the article discussing the link between soft drinks and aggression in children was chosen. It is stated that heavy soda drinkers are much prone to violent behavior than other children. For this particular research, the intake of soft...
The chance of a hit in ideal conditions is 0.5. The player can either hit the ball and make a hit or miss with equal probability. In this sense, it is wrong to say that he must make a hit, but he can make a hit with a chance of...
The AVG parameter shows the success of the batting during a baseball game. Having discarded all other factors, the probability of hitting the ball with a bat is 0.5. From the law of large numbers, this parameter does not say anything about the likelihood of a successful strike during the...
In fact, according to Bernoulli’s law, the average result will tend to be 0.5, as the number of shots has increased, but the number of added goals and tails will not be the same. The intuitive answer that there will be 50 goals and 50 tails is wrong because it...
It is a mistake to assume that the probability of heads or tails falling out during a throw depends on previous results. Despite the last 108 throws, the likelihood of a head fall for a symmetrical coin will still be 0.5. But it is worth distinguishing the probability of a...
To find the median, the data should be arranged in order from least to greatest: 12, 55, 68, 72, 73, 77, 78, 84, 84, 85, 86, 86, 90, 92, 93, 93, 94, 94, 98, 100. Since there is an even number of items, the median is calculated as the arithmetical...
Statistics deals with gathering, grouping, examining, and interpreting numerical values based on their measurable probability. Thus, large data can be analyzed using the measures of central tendency. The information collected can be categorized as quantitative and qualitative data.
To help students remember the multiplication table better, one may use the following chant: Multiplying is so fun!Let’s revise it one by one:(the rhythm slightly changes, the beat becoming more pronounced):Two (beat) times two (beat) is (pause) four,Two (beat) times three (beat) is (pause) six.The teacher should continue until the...
The use of rhythmic exercises to teach students abstract mathematical concepts such as division and fractions has had a tangible effect. The learners liked the idea of applying musical concepts to math and new are trying to locate the elements of math in music.
Among the songs that will help students learn math-related material, rap, and hip-hop hits should be utilized due to their rhythmic nature.
During the collaboration with another student, it was theorized that the concept of fractions could be taught with the help of music. The approach based on using rhythm as the method of explaining fractions was used on fourth graders. The students seemed to have acquired a better idea of fractions...
The strategies implying the integration of music into the process of teaching math to students seem to be very promising as far as their effect on students’ critical thinking is concerned. Therefore, the application of the strategy that involves computing fluency was utilized in the classroom. A drum was used...
Apart from the opportunity to introduce students to a sense of rhythm in math and, thus, allow them to acquire the necessary skills both mechanically and consciously, the use of music in math creates opportunities for learners to use both critical and creative thinking when approaching a particular task. By...
The connections between math and music might seem elusive at first, yet a closer analysis of the specified subjects will show that music can help students understand math better. For example, learners can use the music beat to understand the idea of division. The process of building fluency in third-to–sixth-graders...
Pythagoras was another philosopher interested in discovering the nature of the substance. In his opinion, mathematics (more specifically numbers) is the answer to the question. Since numbers cannot be mistaken, understanding them would provide knowledge about the nature of the substance. He is widely known for his studies of geometry...
From the data given, the age of the students would be the variables since variables represent data that cannot be measured empirically. The cases would be the qualification entry requirements to the university since it is the subject matter of the analysis, and unlike the age of the students, it...
a. The average score of 385 points should be compared to the score of 400 points, considering that the tutor claims that their services will increase the average score of 350 by at least 50. z = ((x-μ)/√(σ2/N)) = ((385-400)/√(352/100)) = -4.285 The p-value for the z-score is 0.000009, which...
The z-score is equal to: z = (12-14)/1.9 = -1.05 Given that the right-tailed p-value for this z-score is equal to 0.85, 85% of babysitters are paid more than my babysitter, which is why it is feasible to give her a rise.
The right-tailed p-value of 0.188 indicates that the value of 20 or greater would occur in 18,8% of cases. The left-tailed p-value of 0.811 indicates that the value of 20 or lower would occur in 81.11% of cases. z = (x-μ)/σ = (20-17)/3.4 = 0.882
a. H0: the mean volume of all the bottles is 6 ounces. Ha: the mean volume of all the bottles is not equal to 6 ounces. b. The z-score is equal to: z = ((x-μ)/√(σ2/N)) = 5.989-(6/√(0.09/10)) = -0.115 c. The p-value is equal to 0.907.d. The null hypothesis should...
a. Ha: the effectiveness of drug B is greater than the effectiveness of drug A; H0: the effectiveness of drug B is equal to the effectiveness of drug A.b. Table 1 presents the outcomes of type I and type II errors. – – Reality Reality – – Drug B is...
H0: the actual space being carpeted is 250 square feet.Ha: the actual space being carpeted is less than 250 square feet.
a. It is a good idea to choose stratified random sampling since it yields more accurate results, as compared to simple random sampling. Workers will be divided into groups by their position. Then, depending on the number of groups, a certain number of workers will be randomly chosen from each...
This is stratified sampling, as the researcher divided the general population into separate groups and randomly selected 10% from each group.
This sampling plan does not result in a random sample because subgroups were randomly selected, and participants were not selected randomly. This is cluster sampling because the entire population was divided into internally heterogeneous groups (clusters), and several clusters were chosen for analysis using simple random sampling.
This is not a random sample since employees who did not attend the meeting did not have a chance to be selected. Instead, this is convenience sampling since subjects were chosen only because the manager could easily access them.
This sampling plan does not result in a random sample since individuals do not have an equal chance to be chosen. In fact, individuals that are at the end of the list may be not even reached if there are more than 2,500 people living in the city. Since the...
Advantages: a lack of bias since all individuals are given an equal chance to be chosen and simplicity, as no additional procedures except for the randomization should be performed. Disadvantages: the need for a large data sample that would represent the total population and a lack of guarantee that conclusions...
I could think of one way of using a simple linear regression model to help me make better health choices. Some time ago, I stumbled upon a piece of research that showed that regular exercise correlated with better sleep quality. While it is now pretty established that physical activity improves...
Everyday use of the concept of confidence intervals that I can think of is buying clothes. It is common knowledge that sizing is often arbitrary and depends on the company. Sometimes, however, I think it is neither negligence nor malicious intent. People come in many shapes and sizes, and it...
When I waited tables a few years ago, I was often curious about the average number of restaurant visitors depending on the day of the week. The information was of value to me because I wanted to know what to expect from a shift, and some of them were really...
Scholars emphasize the significance of the p-value in scientific research and statistics. P-value is the probability of receiving the result that is at least as extreme as the one mentioned in the sample data with the assumption that the null hypothesis is true. When the p-value is less than the...
Numbers, tables, and graphs are very useful when describing a single set of values or showing an association between two sets of values. A single set of values are used in everyday life. For instance, the teaching staff is fond of using single sets of values when evaluating the learners’...
One billion typically has 9 zeros and is written as 1,000,000,000. Explanation: When you need to solve a math problem with large numbers, it is important to know the differences between million, billion, and trillion. One million, however, is one thousand times less than a billion, meaning that it only...