 # Data modeling questions and answers

Recent questions in Modeling data distributions vazelinahS 2021-02-13 Answered

### Explain Energy-based Definition. ddaeeric 2021-02-12 Answered

### There are several methods for system development such as Agile, XP, JAD and RUP. Identity any Two which you think are best for your case giving reasons Suman Cole 2021-02-12 Answered

### The attendances y for two movies can be modeled by the following equations, where x is the number of days since the movies opened. Movie A: $$\displaystyle{y}=-{x}^{{{2}}}+{35}{x}+{100}$$ Movie B: $$\displaystyle{y}=-{5}{x}+{275}$$ Where x is number of days since the movies opened. When is the attendance for each movie the same? Joni Kenny 2021-02-12 Answered

### Suppose \$10,000 is invested at an annual rate of $$\displaystyle{2.4}\%$$ for 10 years. Find the future value if interest is compounded as follows ossidianaZ 2021-02-12 Answered

### Solve and give the correct answer with using second derivative of the function as follows $$\displaystyle f{{\left({x}\right)}}={\left({x}+{9}\right)}^{2}$$ Elleanor Mckenzie 2021-02-11 Answered

### Find an exponential function that fits the experimental data collected over time t. \begin{array}{|c|c|} \hline t & 0 & 1 & 2 & 3 & 4 \\ \hline y & 600.00 & 630.00 & 661.50 & 694.58 & 729.30 \\ \hline \end {array} Suman Cole 2021-02-09 Answered

### The admissions office of a college wants to determine whether there is a relationship between IQ scores x and grade-point averages y after the first year of school. An equation that models the data obtained by the admissions office is $$\displaystyle{y}={0.069}{x}-{4.755}.$$ Estimate the values of x that predict a grade-point average of at least 3.5. (Simplify your answer completely. Round your answer to the nearest whole number.) Isa Trevino 2021-02-09 Answered

### What is the difference between a normal profile of a random variable and normal pdf of a random variable. What is the median value of a random variable having a normal pdf. FobelloE 2021-02-09 Answered

### Use the change-of-base theorem to find an approximation to four decimal places for each logarithm $$\displaystyle{{\log}_{{2}}{5}}$$ coexpennan 2021-02-06 Answered

### At what age do babies learn to crawl? Does it take longer to learn in the winter when babies are often bundled in clothes that restrict their movement? Data were collected from parents who brought their babies into the University of Denver Infant Study Center to participate in one of a number of experiments between 1988 and 1991. Parents reported the birth month and the age at which their child was first able to creep or crawl a distance of 4 feet within 1 minute. The resulting data were grouped by month of birth: January, May, and September: $$\begin{array}{c} & Crawling\ age \\ \hline Birth\ month & Mean & St.dev. & n \\ \hline January & 29.84 & 7.08 & 32 \\ May & 28.58 & 8.07 & 27 \\ September & 33.83 & 6.93 & 38\end{array}$$ Crawling age is given in weeks. Assume the data represent three independent simple random samples, one from each of the three populations consisting of babies born in that particular month, and that the populations of crawling ages have Normal distributions. A partial ANOVA table is given below . $$\begin{array}{c}Source & Sum\ of\ squares & DF & Mean\ square\ F \\ \hline Groups & 505.26\\ Error & & &53.45\\ Total\end{array}$$ What are the degrees of freedom for the groups term? Alyce Wilkinson 2021-02-06 Answered

### When the chi squared statistic is used in testing hypothesis? Include underlying assumptions and the test statistic for testing hypothesis on a single population. What is the criterion for rejecting the null hypothesis for both non-directional and directional tests? How do you find the p value in each case? naivlingr 2021-02-06 Answered

### What is the difference between a discrete probability distribution and a continuous probability distribution? Give your own example of each. e1s2kat26 2021-02-04 Answered

### In these problem you are asked to find a function that models a real-life situation. Use the principles of modeling described in this Focus to help you. Radius find a function that models the radius r of a circle in term of its area A. waigaK 2021-02-02 Answered

### Solve the general initial value problem modeling the LR circuit, $$\displaystyle{L}\ {\frac{{{d}{I}}}{{{\left.{d}{t}\right.}}}}\ +\ {R}{I}={e},\ {I}{\left({0}\right)}={I}_{{{0}}}$$ where E is a constant source of emf. midtlinjeg 2021-02-02 Answered

### Determine which of the following functions $$\displaystyle{f{{\left({x}\right)}}}={c}{x},\ {g{{\left({x}\right)}}}={c}{x}^{{{2}}},\ {h}{\left({x}\right)}={c}\sqrt{{{\left|{x}\right|}}},\ \text{and}\ {r}{\left({x}\right)}=\ {\frac{{{c}}}{{{x}}}}$$ can be used to model the data and determine the value of the constant c that will make the function fit the data in the table. $$\begin{array}{|c|c|} \hline x & -4 & -1 & 0 & 1 & 4 \\ \hline y & -32 & -2 & 0 & -2 & -32 \\ \hline \end {array}$$ Bergen 2021-02-02 Answered

### The measure of the supplement of an angle is $$\displaystyle{40}^{{\circ}}$$ more than three times the measure of the original angle. Find the measure of the angles. Instructions: Use the statement: " Let the original angle be x " to begin modeling the working of this question. a) Write algebraic expression in terms of x for the following: I) $$40^{\circ}$$ more than three times the measure of the original angle II) The measure of the Supplement angle in terms of the original angle, x b) Write an algebraic equation in x equating I) and II) in a) c) Hence solve the algebraic equation in b) and find the measure of the angles. SchachtN 2021-01-31 Answered

### This exercise requires the use of a graphing calculator or computer programmed to do numerical integration. The normal distribution curve, which models the distributions of data in a wide range of applications, is given by the function $$p(x)=\frac{1}{\sqrt{2 \pi}^{\sigma}}e^{-(x-\mu)^{2}}/(2 \sigma^{2})$$ where $$\pi = 3.14159265 . . .$$ and sigma and mu are constants called the standard deviation and the mean, respectively. Its graph$$(\text{for}\ \sigma=1\ \text{and}\ \mu=2)$$is shown in the figure. With $$\sigma = 5 \text{and} \mu = 0$$, approximate $$\int_0^{+\infty}\ p(x)\ dx.$$ Carol Gates 2021-01-28 Answered

### The entrance of a tunnel can be modeled by $$\displaystyle{y}=-{\frac{{{11}}}{{{50}}}}{\left({x}-{4}\right)}{\left({x}-{24}\right)}$$ where x and y are measured in feet. The x-axis represents the ground. Find the width of the tunnel at ground level. Wierzycaz 2021-01-28 Answered

### Give a real-life example of data which could have the following probability distributions Solve a) bimodal distibution b) uniform distribution c) exponential distribution only early Nannie Mack 2021-01-25 Answered

### The table shows the temperatures T (in degrees Fahrenheit) at which water boils at selected pressures p (in pounds per square inch). A model that approximates the datais: $$\displaystyle{T}={87.97}\ +\ {34.96}\ \text{In}\ {p}\ +\ {7.91}\ \sqrt{{{p}}}$$ a) Use a graphing untility to plot the data and graph the model in the same veiwing window. How well does the model fit the data? b) Use the graph to estimate the pressure at which the boiling point of water is  $$300^{\circ}$$ F. c) Calculate T when the pressure is 74 pounds per square inch. Verify your answer graphically.

Statistics and probability also include various data modeling questions, which can be encountered basically everywhere from Social Sciences and Biology to Engineering and Data Science. Depending on your questions, you can receive immediate help by looking through the data modeling examples that we have presented below for you. These will help you to find solutions and find the answers to presented challenges. It is recommended to model your data carefully and to check things twice to ensure that everything is correct because accuracy is the key to any statistical work where a calculation is involved.
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