Q and A for the topic: General

How do you identify the Noel and alternative hypothesis?

15,9 ÷ 8,759

In 20 minutes Luis arrives from his house at the Santo Tomás Technical Training Center. What percentage and fraction of an hour does it take Luis to go from his house to Santo Tomás?

The average score for a sample of 45 of your students on a quiz was 52, while other sections that took the same quiz was 58. The standard deviation for your class’s scores is 3.7. Can you conclude that the population mean score for your class is different than the mean score for the rest of the sections?

Write a program that allows the user to enter an af grade and issues a message corresponding to each grade according to the grade entered: A-excellent D- enough B-good F- Not enough c-regular

In the agenda for the next fifteen days, the tasks that must be developed are assigned. Your boss asks you to divide the tasks into three stages. In the first stage, you must develop 2/7 of the tasks, in the second stage, 2/3 of them. what remains and in the third stage the rest, which corresponds to 20 hours. The hours used in the first and second stages are respectively:

3,4 and 5,2 finding the slope

Lost time accidents occur in a company at a mean rate of 0.8 per day. What is the probability that a number of lost time accidents occurring over a period of 9 days will be no more than 5? Round to the nearest four decimal places.

Tynne is doing a literature review to understand what may affect obsessive personality. Tynne finds multiple research studies that have used linear regression analyses, looking at different factors that predict obsessive personality. The best statistic that Tynne can extract from these papers’ results sections in order to compare results across the papers and find the strongest predictor of obsessive personality is: Question 7Answer a. F statistic b. T-statistic c. Unstandardized beta coefficient d. Standardized beta coefficient e. P-value

7+ 8

This ecological study will be conducted using data from two sources. Data will be analysed from Global burden of disease (www.healthdata.org) for prevalence of male infertility and smoking for age groups >15 from year 2012-2019 and the data from Eurobarometer (www.europa.eu/eurobarometer/) on E-cigarettes usage of the same age groups and year under study. In the Eurobarometer database, electronic cigarette use is typically measured through survey questions that assess individuals' self-reported behaviours and attitudes towards e-cigarette use but they generally aim to gather information on the prevalence and patterns of e-cigarette use among the surveyed population. The following statistical analysis will be planned with the aggregated data. Employing a linear regression model with the male infertility prevalence as the dependent variable and the e-cigarette usage as the independent variable. Each data point in the model will represent a specific EU country during a particular year. A suitable regression method will be used to estimate the coefficients of the regression equation which will help establish the relationship between male infertility and e-cigarette usage rates, accounting for the variability across the EU countries. Furthermore, if other predictor variables at the country level are identified and data is available, they may be added to the regression model. This will help improve the estimation of coefficients and enhance the overall understanding of the relationship between male infertility and e-cigarette usage rates across EU countries. The quality of the regression model will be examined by the goodness-of-fit measures. These metrics will indicate how well the model explains the variations in male infertility rates based on e-cigarette usage rates. The results of the linear regression analysis, including the significance and direction of the regression coefficients will determine if there is a statistically significant relationship between male infertility and e-cigarette usage rates among men aged >15 across the EU countries. Visualizations, such as scatter plots, to depict the relationship between male infertility prevalence rates and e-cigarette usage rates across the EU countries over the study period will be created. The results will be interpreted from the statistical analysis, including the strength, direction, and statistical significance of the regression.

What is the probability of rolling a six when rolling the dice three times?

In a factory the most important operation is painting. At the painting site there are always two workers working at the same time, although due to the physical setup, they cannot help each other. Arrivals at the painting area occur according to a Poisson process with an average arrival rate of 100 per day. Each collaborator takes an average of 27 minutes to paint an article. Lately, the excess of ongoing work is a cause for concern, so management is considering expanding the painting area and hiring a third worker. (It is assumed that the 3rd worker, after a training period, will also take an average of 27 minutes per piece). After the advancement of technology, the other option would be to buy a robot to carry out the workers' task, since it is known that the average time it will take for each piece is 10 minutes.

Find the slope of the tangents to the curve y=−x2+5x−6

Which three of the following discrete variables are binary Which side of a coin lands uppermost when thrown Whether you have a pet Rank in the armed forces Whether you wear glasses Grade of musical proficiency The last two digits of the telephone number of a football team

A NaOH titrant solution with 2 grams of NaOH in 100mL where the Volume is 40mL, was used to determine the concentration of HCl acid (analyte solution) where the volume = 20mL. Calculate the concentration of HCl acid analyte solution in mol/L. Present your solution in mol/L to 1 significant figure. Enter a numeric value only without the mol/L unit.

An object of mass 500 g and density 0.8 g/cm³ is immersed in a liquid of density 1.2 g/cm³. What is the volume of the object that remains outside the liquid?

Prove that in every right triangle whose acute angles measure 75 and 15 degrees, the height corresponding to the hypotenuse is equal to a quarter of it.

find the inverse of f(x)=2x^(2)+7

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