 # Data distribution questions and answers

Recent questions in Data distributions
2022-05-09

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### the following are scores of 20 students in an exam. compute the mean score   Osvaldo Apodaca 2021-12-11 Answered

### Supplier delivery times. Supplier on time delivery performance is critical to enabling the buyer’s organization to meet its customer service commitments. Therefore, monitoring supplier delivery times is critical. Based on a great deal of historical data, a manufacturer of personal computers finds for one of its just-in-time suppliers that the delivery times are random and well approximated by the Normal distribution with mean 48.2 minutes and standard deviation 13.4 minutes. What is the probability that the mean time of 5 deliveries will exceed one hour? Ikunupe6v 2021-12-11 Answered

### a) Calculate , and $S{S}_{xy}$ (Leave no cells blank - be certain to enter ''0'' wherever required. Round your answers to 2 decimal places.)$\begin{array}{|ccccc|}\hline \text{College}& \text{Student}& \text{Weekly}& \text{Earnings}& \text{Dollars}\left(n=5\right)\\ \text{Hourse Worked (X)}& \text{Weekly Pay (Y)}& \left({x}_{i}-\overline{x}{\right)}^{2}& \left({y}_{i}-\overline{y}{\right)}^{2}& \left({x}_{1}-\overline{x}\right)\left({y}_{i}-\overline{y}\right)\\ 11& 103\\ 16& 187\\ 16& 216\\ 16& 157\\ 32& 262\\ \\ \overline{x}& \overline{y}& S{S}_{xx}& S{S}_{yy}& S{S}_{xy}\\ \hline\end{array}$b) )Calculate the sample correlation coefficient. Check your work by using Excel's function =CORREL(array1,array2). (Round your answer to 4 decimal places.) namenerk 2021-12-11 Answered

### There is a fire sensor system in a building. In long series of experiments, it was found that the accuracy of the fire sensor system can be described as follows: - In the case of a fire, the sensor system will be activated with probability 0.97. - In a night without fire, the sensor system may be activated with probability 0.01. The probability of a fire in this specific area is founded $\frac{2}{397}$ from the past data. The fire sensor system is activated. Find the probability that there was actually a fire. jamessinatraaa 2021-12-11 Answered

### The Truly Amazing Dudes are a group of comic acrobats. The weights (in pounds) of the ten acrobats are as follows. 146 192 174 177 159 87 178 152 144 148 (a) Find the mean and sample standard deviation of the weights. (Round your answers to one decimal place.) mean 155.7 lbs standard deviation ? lbs (b) What percent of the data lies within one standard deviation of the mean? % (c) What percent of the data lies within two standard deviations of the mean? % prsategazd 2021-12-11 Answered

### If a data set has an even number of observations, the median interdicoxd 2021-12-11 Answered

### On October 30, 2020 the Center for Disease Control (CDC) reported that the daily COVID-19 data showed there were 1.2 new infections per second and that the daily death rate was one death every 107 seconds. Answer the following questions. Show all your calculations and write a sentence about your conclusion: A.Use the CDC data to calculate the total number of daily infections on October 30th. B. How many deaths were reported on October 30th? Juan Hewlett 2021-12-11 Answered

### The Ocoriee Company somethimes makes printing errors in its advertising in the next issue of the paper "The managing editor has done a study of this problem and found the following data: $\begin{array}{|cccccc|}\hline \text{Number of Errors}& 0& 1& 2& 3& 4\\ \text{Probability}& 0.56& 0.21& 0.13& 0.07& 0.03\\ \hline\end{array}$ the probability that the next issue of the paper will have at least 1 error is Select: a. 0.21 b. 0.77 c. 0.56 d. 0.44 Monique Slaughter 2021-12-11 Answered

### From the same data, answer the following - What is the probability that it is a male or in managerial position? - What is the probability that it is neither male nor in managerial position - What is the probability that it is female or clerical portion? $\begin{array}{|cccc|}\hline Position& Male& Female& Total\\ Managerial& 8& 4& 12\\ Engineer& 18& 7& 25\\ Accountant& 3& 5& 8\\ Clerical& 15& 28& 43\\ Total& 44& 44& 88\\ \hline\end{array}$ nemired9 2021-12-11 Answered

### Let T be the time needed to complete a job at a certain factory. By using the historical data, we know that a. Find the probability that the job is completed in less than one hour, i.e., find $P\left(T\le 1\right)$. b. Find the probability that the job needs more than 2 hours. c. Find the probability that $1\le T\le 3$. Teddy Dillard 2021-12-11 Answered

### Give the following data, which is the equation of the regression line? $\begin{array}{|cccccc|}\hline X& 0& 3& 4& 5& 12\\ Y& 8& 2& 6& 9& 12\\ \hline\end{array}$ a. $y=4.88+0.625x$ b. $y=4.98+0.425x$ c. $y=4.98+0.725$ d. $y=4.88+0.525$ kuvitia9f 2021-12-10 Answered

### Can you find two tailed test p value for given data Sample size 14 Test statistics -2.23 Tara Alvarado 2021-12-10 Answered

### Marriage Prospects Data released by the Cense Bureau in 1986 indicated the likelihood that never married women would eventually marry. The data indicated that the older the women, the less the likelihood of marriage. Specifically, two statistics indicated that women who were 45 and never married had an 18 percent chance of marriage and women 25 years old had a 78 percent chance of marriage. Assume that linear fit to these two data points provides a sonable approximation for the function p-f(a), where p equals the probability of marriage and aequals the age of a no married woman (a) Determine the linear function pfla (b) Interpret the slope and p intercept Ikunupe6v 2021-12-10 Answered