Brite-Glo Paint Employee Commuting Times (minutes) 10 15 + 20 25 30 35 +- 40 + 45 50 55 60 Morning Comute Evening Commute 1. What were the median morning commuting time and the median evening commuting time? merning medicn 30 evenng medion
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Quadratic Equation
When it comes to the concept of polynomial equations, quadratic equations can be said to be a special case. What does solving a quadratic equation mean? We will understand the quadratics and their types once we are familiar with the polynomial equations and their types.
Demand and Supply Function
The concept of demand and supply is important for various factors. One of them is studying and evaluating the condition of an economy within a given period of time. The analysis or evaluation of the demand side factors are important for the suppliers to understand the consumer behavior. The evaluation of supply side factors is important for the consumers in order to understand that what kind of combination of goods or what kind of goods and services he or she should consume in order to maximize his utility and minimize the cost. Therefore, in microeconomics both of these concepts are extremely important in order to have an idea that what exactly is going on in the economy.
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- A candidate claims that she has 60% support from the general electorate. A random sample of 40 likely voters is taken, and 21 of them (53%) say that they support the candidate. In order to conduct a statistical analysis, the One Proportion applet was used to see if the candidate's claim is plausible. Use the dot plot generated by the applet (pictured above) to answer the following questions. a) There are 100 dots in the simulated distribution. What does each dot represent? The proportion of people who support the candidate in a sample of 100 people, if we don't know the percent of people in the population who support the candidate. The proportion of people who support the candidate in a sample of 40 people, if we assume that 53% of the population supports the candidate. The proportion of people who support the candidate in a sample of 40 people, if we assume that 60% of the population supports the candidate. The proportion of people who support the candidate in a sample of 100…A graph (not shown) of the selling prices of homes in a certain city for the month of April reveals that the distribution is skewed to the left. Which of the following statements is the most reasonable conclusion about the selling prices based on the graph? The mean is greater than the median. The median is the average of the first quartile and the third quartile. There are fewer selling prices between the first quartile and the median than there are between the median and the third quartile. There are more selling prices that are less than the mean than selling prices that are greater than the mean. The value of maximum minus third quartile is less than the value of first quartile minus minimum.In a data set of wages of productivity lost during a recent recession, the distribution can be roughly described as unimodal and very left-skewed. Select the most appropriate conclusion from the list of statements. A. Calculating the midrange is much more tedious process than calculating the mean. B. The median of wages lost must be far lower than the mean of wages lost. C. The mean is the most representative measure of center for this data set. D. If there are extremely high lost wages present, the mean will not be sensitive to these data values.
- Makers of generic drugs are required to show that their generic drugs do not differ significantly from the “reference” or brand name drugs that they imitate. One aspect in which the generic drugs might differ is their extent of absorption in the blood. Twelve subjects were available for the study. Six were randomly selected to receive the generic drug first and then, after a washout period, receive the “reference” drug. The remaining six received the “reference” drug first, followed by the generic drug after the washout period. Suppose the actual p-value for a two-sided test is 0.140. On the basis of this p-value, what should you conclude at α = 0.05? Group of answer choices The mean difference between the absorption rate of the reference drug and the absorption rate of the generic drug is equal to zero There is insufficient evidence to conclude that the mean difference between the absorption rate of the reference drug and the absorption rate of the generic drug is not equal to…If the mean of a distribution is greater than its median, then a) the distribution has a very high variance b) the distribution has a number of very small values c) the distribution has a very low variance d) the distribution has a number of very large valuesThe Table below shows the average score of the150 students sampled from theUniversity of the East Europe in the academic year 2020/2021.Score (out of 100) Number of students40-44 1945-59 3260-64 4965-69 2970-74 21i. calculate the mean score of the students ii. calculate the modal score iii. calculate the median score iv. Use your results above to comment on the shape of the distribution. Give a reason for youranswer.
- a. Use the sample data with a 0.05 significance level to test the claim that for the population of ages of Best Actresses and Best Actors, the differences have a mean less than 0 (indicating that the Best Actresses are generally younger than Best Actors). In this example, μd is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the actress's age minus the actor's age. What are the null and alternative hypotheses for the hypothesis test? b. Identify the test statistic. c. identify the p value d. Construct the confidence interval that could be used for the hypothesis test described in part (a). What feature of the confidence interval leads to the same conclusion reached in part (a)?A television cable company receives numerous phone calls throughout the day from customers reporting service troubles and from would-be subscribers to the cable network. Most of these callers are put “on hold” until a company operator is free to help them. The company has determined that the length of time a caller is on hold is normally distributed with a mean of 3.1 minutes and a s.d of 0.9 minute. What percentage of company’s callers are put on hold for at least 4.8 minutes?A one sample hypothesis test examines whether a sample significantly differs from a population. However, in “real” life, we rarely know the descriptive statistics of a population, which is why we do inferential statistics. Because we don’t have access to a data set that has information for a population, in the lab we are going to make a few assumptions in order to review one-sample hypothesis testing. One-Sample Hypothesis Testing Let’s assume that the United States population is evenly split; so exactly half of the U.S. are men and the other half of the U.S. are women. In SPSS, the variable sex has been coded as 1=male, 2=female. Recode it so that it equals 1=female, 0=male. Then, this variable’s mean can be interpreted as a proportion. Therefore, if we were to poll the entire U.S. population, we would expect a population mean of around .5, or 50% female. Is there a significant difference between the gender representation in our 2018 GSS sample and our hypothetical U.S. population?…
- The time required for a citizen to complete a 2000 U.S. Census “long” form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. What is the probability that a citizen will need more than 60 minutes to complete a “long” form (using the partial Appendix C-2 table below)? a. 0.0174 b. 0.0228 c. 0.9826 d. 0.9772A project company hired 10000 casual employees to undertake a major housing project for 2 weeks. On average (daily) these workers take 10 hours to complete a given task with a s.d deviation of 2.5 hours. If completion time is normally distributed, determine the no. of workers who completed the task in:- i. Less than 7 hours Less than 12.5 hours More than 13.5 hours Between 6.75 hours and 14.75 hours Between 5.85 hours and 8.85 hours Between 12.75 hours and 15.95 hours If the firm decides to lay off all the workers who cannot complete the task within 16.5 hours, how many workers will the firm lay-off?12) The distributions of income in the United States is strongly skewed to the right. Which of the following is true? A) There is not enough information to compare the median and mean values.B) The median income is smaller than the mean income.C) The median income is equal to the mean income. D) The median income is larger than the mean income.