Business Maths Statistics Assignment 1

At 5% level of significance, is there sufficient evidence to conclude that the proportions of errors in transactions assigned to each of the 5 memory locations are all different?

Gender in the local area is relatively equal in terms of numbers and percentiles. With females bringing in the highest portion of the population and males closely behind. (see Table 2) This goes right along with a relatively even gender ratio overall. This starts to differ within the median age groups where males are the majority. After age 44 females take over and become the larger gender in every respective age group. Even with females making up most the population, in almost every age category males make more money in every race. (city-data, 2000-2015)

9. If there were 32 subjects in the experimental group and 36 subjects in the control group, why is the income data only reported for 30 subjects in the experimental group and 34 subjects in the control group?

This boxplot displays this information in a graphical format. The box represents the lower quartile of $30,250 (25% of incomes are less than this value), the median of $42,000, and the upper quartile of $54,750 (25% of incomes are greater than this value).

Income level data is a good indicator of residents’ spending power. Income positively correlates with retail expenditures in many product categories. During market evaluation, retailers look at the median or average household income, and seek a minimum number of households within a certain income range prior to establishing a business or setting prices. Another common practice is to analyze the distribution of household incomes. Different businesses may avoid extremely high or low-income areas. Some specialty fashion stores target incomes above $100,000.

Income level (question H16) - “We would like to know in what group your household is. Please select the appropriate number, counting all wages, salaries, pensions and other incomes that come in.” responses range from 1 (lowest income group) to 10 (highest income group).

versus women with a SD 13.63. This shows that women had less variation in their

A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Using   = .05, what is the value the test statistic?

In addition, the other changes such as income at 25% quantile and 75% quantile level are smaller. Thus, compared to 1980, the bottom household had earned much less and the difference become larger after weighting, and the top household had earned higher but the difference is smaller.

There is a lot in this chart, however focus your attention to the last three line: percent of cohort who are high achievers, radius to gather 20 high achievers, and radius to gather 50 high achievers. Notice, for the category of percent of cohort who are high achievers, that the people included under high income students

In Wave 1 and Wave 2, participants were asked two questions that will be used to calculate an estimate of yearly income. First, participants were asked, “How much money do you earn in a typical non-summer week from all your jobs combined?” Second, participants were asked, “How much money do you earn in a typical summer week from all your jobs combined?” Both questions allowed for a numerical response (e.g., not a range). Assuming a traditional academic calendar, summer weekly income will be multiplied by 12 and the remainder of weeks in the year (40) will be considered non-summer

Researcher wanted to know the number of respondents according to their sexes. Both men and women equally featured in this research.

As the graph showing that, in a group of male teachers 11 of 18 (61.1%)have mid-digital hair at least on one of their finger. 6 of 18 (33.3%)female teachers have mid-digital hair on their finger(s). The two pictures on the left is male teacher who has mid-digital hair and who doesn’t have mid-digital hair. The pictures on the right is female teacher who has mid-digital hair and who doesn’t have mid-digital hair. Some of their hair are blond, it’s not easy to observe. Through the graph, you can directly see that the ratio of male have mid-digital hair is higher than female.

There are various ways of presenting the income distribution in any country. It can be graphically represented using a histogram with the various ranges of net worth as shown in the following figure.

INTERPRETATIONS:- The proportion of respondents are somewhat equal with not much of the major difference between male and female respondents