What is moving average? What are its uses in analysis of time series? Given the numbers 2, 6, 1, 5, 3, 7, 2; write down the weighted moving average of period 3, the weights being 1, 4, 1.

Q: For a group containing 100 observations, the arithmetic mean and standard deviation are 8 and v10.5....

A: 100 observations : Mean = 8, standard deviation = sqrt(10.5) Now for 50 observations : Mean=10 and S...

Q: A die was tossed 60 times and the out come was as follows: Outcome 1 96 Freq 6. 15 69 8. 6. 13 If Di...

A: Solution-: We find the expected frequency of occurrence of each outcome?  

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 4000 panels. Ten percent ...

A: Given that Plant A produced 4000 panels and defective is 10% Defectives from plant B is 3%,  overall...

Q: What is the alternative hypothesis? O All of the three schools have equal population mean student IQ...

A: For the given table What is null and alternative hypothesis ?  

Q: Give a practical interpretation of the estimate of the  slope of the least squares line.

A: here given, An oil exploration company wants to develop a statistical model to predict the cost of d...

Q: Distribution A is a distribution of sample means with a mean of 50 and standard error of 5. Distribu...

A: It is given that: The sample mean of distribution of A = 50, Standard error of distribution of A = 5...

Q: A manufacturer of apple phone charges claims that only 4% of his production is defective. In a rando...

A:

Q: An experiment consists of testing two integrated circuits that come from the same silicon wafer, and...

A: We have given that 

Q: The weekly demand for a product is believed to be normally distributed. Use a goodness of fit test a...

A: Given that,              Sample mean x¯=24.5              Sample standard deviation, s=3            ...

Q: Example 9-30. The daily consumption of milk in a city, in excess of 20,000 itres, is 1 approrimately...

A:

Q: 44, find the standard deviation of the second.. sub-group.

A: Here use variable A for first sub group Variable B for second sub group and  T for whole group Here ...

Q: Assume that the monthly worldwide average number of airplaine crashes of commercial airlines is 2.2....

A: poisson distribution is given by  

Q: More and more households are struggling to pay utility bills given high heating costs. Particularly ...

A: a. The contingency table is given as follows: Delinquent in Payment Type of Heating   Na...

Q: Which of the following hypothesis tests has hypotheses closest to the hypotheses of Chi-square test ...

A: To identify: The test that has hypotheses closest to the hypotheses of Chi-square test for multiple ...

Q: b) The following table shows the time students from a college took to complete a marathon. Time (min...

A:

Q: I. Given the Table 1, compute for the following: 1. Estimate the standard deviation of the given dat...

A: Given Information: Consider the data of astigmatism in 1033 young men age 18-22, Degree of Astigm...

Q: Consider a sample set as S = {2,4,6,8,10,12,14,16,18,20}. Event A is the multiples of 4, while event...

A:

Q: Three math classes took a quiz, and their scores are displayed in the histograms below. Set A 16 14 ...

A: I want to tell you which one is the correct choice.

Q: How do you find the mean and median from a frequency chart ?

A: Frequency chart is the representation of frequency of various outcomes in a sample. **  Frequency ch...

Q: Twenty-five randomly selected students were asked the number of movies they watched the previous wee...

A: Calculation of sample mean and sample standard deviation:

Q: In one statistics course, students reported studying an average of 9.92 hours a week, with a standar...

A: Let X be the random variable from normal distribution with average or mean (μ) = 9.92 and standard d...

Q: using the scale box - and whisker plot for eaxh of the two data set  replacing the second plot below...

A: Given   

Q: Which of the following are specified by the central limit theorem? a. the mean of a specific sample...

A: here we know that The Central Limit Theorem, the distribution of the sample means approximates a nor...

Q: Create a histogram for the class boundaries

A: 1. Select the data. 2. Click the insert tab, than click (Statistical icon) and under Histogram, Sel...

Q: Suppose there are three balls in a box. On one of the balls is the number 1, on another is the numbe...

A:

Q: Reject H0 if t > -1.6604.       Reject H0 if t > -1.9842.       Reject H0 if t > 1.9842 or Z < -1.98...

A:

Q: U and V are mutually exclusive events. P(U) = 0.16; P(V) = 0.59. Find: a. P(U and V) = b. P(U|V) = c...

A: Two events U and V are given.

Q: . Calculate the coefficient of skewness from the following data by using quartiles. Marks No. of stu...

A:

Q: How much alcohol can one consume before one's Blood Alcohol Content (BAC) is above the lega An under...

A: Outlier: An outlier is the value with the larger magnitude compared with the other values.   From th...

Q: The Medical Association of Trinidad and Tobago is interested in determining the impact of a new drug...

A: From the provided information, Sample size (n) = 11 Confidence level = 95%

Q: A student receives test scores of 62, 83, and 91. The student's term project score is 88 and the hom...

A:

Q: Find the area: (a) between 2.25 and -1.25 (b) between -2.38 and -1.28

A:

Q: The table below shows the color and the model of cars purchased by 160 randomly selected customers a...

A: Use a 5 percent level of significance to test the null hypothesis that color chosen and car model ar...

Q: From the table below, find whether item No. 25 of an intelli- gence test differentiate between the t...

A:

Q: Question Number 02:  Calculate the CGPA for the subjects from the grades as mentioned in Table 1: Se...

A: The CGPA is described as the weighted average, considering the credit hours (CH) as the assigned wei...

Q: Find the value of u, and u, from the following data: Intelligence Scores f 40-44 3 35-39 30-34 25-29...

A:

Q: Find out the value of A' statistics from the following data, when N = 10 9 11 12 17 Trial II: 14 6 1...

A:

Q: Each type of machine is set up to do the same work (e.g., both stamping presses perform the same ope...

A: Here given,  5 operators with different rates of productivity on the drill presses, stamping presses...

Q: From the following data compute the value of harmonic mean : Marks 10 20 25 40 No. of students 50 20...

A:

Q: • Enumerate and differentiate the approaches in calculating probabilities.

A: We have to define the different approaches of calculating probabilities:   

Q: Based on the information below, which pair is not statistically different? xbar_A = 251.6 n_A = 5 MS...

A: The Studentized range (Q) distribution is used to compare the significant difference between multipl...

Q: A fair die is thrown 13 times. Find the probability that the number of fives obtained is between 1 a...

A: Let X be the number of getting 5  Let p be the probability of getting head  S=sample space={1,2,3,4,...

Q: Which of these two research objectives may be addressed using Chi-Square test of independence?

A: Chi square test of independence is used to determine whether two variables are dependent or not.

Q: Ah amusement park studied methods for decreasing the waiting time (minutes) for rides by loading and...

A: For given data Find Test statistics ,p values, Conclusions for method of loading and unloading , typ...

Q: Average speed on a freeway is  80  mph.   Among all vehicles 65% drive 8 miles above the speed limit...

A:

Q: n online retailer would like to know whether the proportion of customers who visit the site and make...

A: Solution: Given information: p= 0.50 Population proportion.  Confidence level = C=95%  Claim: The pr...

Q: Ceu male and standard deviation 2.8 inches. ch is omen. 68-95-99.7 rule.) ) How large an SRS do you ...

A: We have given that.   X~N( μ , ?^2 )   μ = 125, ? = 10 , n= 4   Z-score =( x - μ )/?  

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed, ...

A:

Q: TABLE 13-6 Let X and Y be two random variables each X -1 ! luking three values -1, 0 and 1, and havi...

A:

Q: 13.27 Women's heights. A random sample of female college students has a mean height of 65 inches, wh...

A: