Q2) ( 1 The frequency table below shows the Compressive strength of concrete sampes results: No. of samples Compressive strength (MPa) 25-34 35-44 45 - 54 10 12 55- 64 65-74 1- Calculate the Mathematical Mean, Median and Mode. 2- Calculate Variance, Standard Deviation and Mean Absolute Deviation.

Q: Question 2 The Zambian average for the number of students per teacher for all public schools is…

A: Given S=2.1 n=12 x-bar=19.2

Q: Suppose testing has been done for a chemical in the local water with readings of 3.1, 5.2, 1.2, 5.1,…

A: x x2 3.1 9.61 5.2 27.04 1.2 1.44 5.1 26.01 4.9 24.01 2.3 5.29 6.1 37.21 1.4 1.96…

Q: Show hypothetical or imagined data on the scores of 10 students in a 50 – item test where the…

A: Given that a data on the scores of 10 students in a 50 – item test where the highest score is 48 and…

Q: A bolt manufacturer is very concerned about the consistency with which his machines produce bolts.…

A: As per bartleby guideline expert have to answer first three subpart only dear student please upload…

Q: A random sample of 25 students were asked to self-identify as "statistics-lovers" or…

A: Denote μ1, μ2 as the population mean number of students who “love” statistics and who “adore”…

Q: Table 1 Sample Mean X = 5 ỹ = 4 z = 5 Sample Variance Sx2 = 1 Sy2 = 3 S22 = 13 Sample Standard…

A: Covariance is a measure which we use in statistics to find the variability in two variables which we…

Q: 6.2.3 please help bored just trying to kill time

A:

Q: While weighing twenty of one-kilogram sugar bags we noted the measured values in kg : 1.00, 1.01,…

A: We have to find median and variance of the measured weight..

Q: A climatologist is interested in comparing the frequency of cloud cover in Thunder Bay and Sudbury.…

A: Given that A climatologist is interested in comparing the frequency of cloud cover in Thunder Bay…

Q: In a study of speed dating, female subjects were asked to rate the attractiveness of their male…

A: Variance = 3.3*3.3 = 11.0 Range = 10-1 = 9

Q: below attached

A: (a)Step-by-step procedure to obtain the mean square error using EXCEL software:Create the variable…

Q: 1. A survey found that the average hotel room rate in Luzon is P2,300and the average room rate in…

A:

Q: O For data given in table below, determine: 1- Standard deviation (S), Coefficient of Variance Cy-…

A: Formula Used: Standard deviation S = ∑FX2-nX2n-1 Where, Mean X = ∑FXn Coefficient of variation  =…

Q: A bolt manufacturer is very concerned about the consistency with which his machines produce bolts.…

A: Introduction: Denote the true population variance of the diameter of the bolts as σ2, and the…

Q: and expenses charged by An artici expenses and municipal bond fund expenses are each approximately…

A:

Q: By the way, what is standard deviation? what in standard deviation 34.1% 34.1% 2,1% 0,1% 13.6% 2.1%…

A:

Q: Compute the values a and b such that the fit of type aX+b provide the desired mean and variance?

A:

Q: This data is from a sample. Calculate the mean, standard deviation, and variance. x 45.2 47.8 42.2…

A: Gicen data, X X2 45.2 2043.04 47.8 2227.84 42.2 1780.84 27.7 767.29 38.1 1451.61 11.8…

Q: Age (yr) of BestActor When Oscar was won 38. Age (yr) of UCL Frequency Best Actor When 20 29 1 Oscar…

A:

Q: A personnel director in a particular state claims that the mean annual income is greater in one of…

A: Given:A personnel director in a particular state claims that the mean annual income is greater in…

Q: State the null and alternative hypothesis (in symbol) for the given situtation. The variability of…

A:

Q: This data is from a sample. Calculate the mean, standard deviation, and variance. x 16 39.2 31.8…

A: Sample mean: Sample mean=∑xin=16+39.2+31.8+...+32.29=314.29=34.91 Sample standard deviation: Sample…

Q: A company that manufactures oil seals found that the population mean is 49.14 mm, the population…

A: Let x be the continuous random variable said to be follows the normal distribution with mean μ and…

Q: b) A procurement specialist purchased 28 resistors at random from Supplier 1 and 32 resistors from…

A: It is given that: For Supplier-1:μ1population mean=105σ1population standard deviation=1.58n1 sample…

Q: 10- 10- 5- 5- 0- 0.5 5.5 10.5 15.5 20.5 25.5 30.5 35.5 40.5 45.5 5.5 10.5 15.5 20.5 25.5 30.5 35.5…

A: Given : For region A: Mean = $33.07 Standard deviation = $10.22 For region B : Mean = $22.93…

Q: The amount of chlorine in 100 cm3 water taken from a water tank was measured, the average was 2.15…

A: A test based on a large sample is called a large sample test. For a large sample, the sample size…

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: Here , 2 sample t test ( Equal variances) is applicable

Q: Calculate the ratio of two variances and test the equality of the variances and comments. c.…

A:

Q: A manufacturer of metal plates makes two claims concerning the thickness of the plates they produce.…

A: Given information: Thickness(x) 194.66 195.43 195 193.76 193.29 194.57 193.65…

Q: It is a statistical analysis that examines two or more independent samples based on one…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: Stock A has an expected return of 10% and standar deviation of 20%. Stock B has an expected return…

A: Given that: For stock A: Expected return=10%=R1Standard deviation=20%=σ1 For stock B: Expected…

Q: Q2) For the data in the following table find: 1. Variance 2. Standard deviation 3. Standard score…

A:

Q: Suppose that the rice mill wants to test its product to find out whether it meets the average weight…

A: We have given that,  the average weight of rice of 50 kilograms with a standard deviation of 0.18…

Q: Q1 (a) An autonomous vehicle test drive results reported failure rate of craches without injuries…

A: (i) Obtain the standard deviation of the sample. The standard deviation of the sample is obtained…

Q: 1. Researchers found that the volume of a sample of 16 cans of Coke has a mean of 12.19 oz with a…

A:

Q: Two accounting professors decided to test if the variance of their grades is different or no.…

A: We havr to find correct answer.

Q: c) Your Components division manufactures capacitors, and the mean capacitance of 400 capacitors you…

A: c) Given information: n=400x¯=100 μFs=7μF

Q: 4 - The amount of chlorine in 100 cm3 water taken from a water tank was measured, the average was…

A: Null hypothesis: µ=2.15. Alternative hypothesis: µ>2.15.

Q: We want to test whether males are taller than females. Heights of males and females are collected…

A: Different null and alternative hypotheses can be defined as given below Two tailed test: Left tail…

Q: Q1.      Following is the data related to the daily production of the two factories of same product…

A: I have used excel to calculate the numerical values

Q: A personnel director in a particular state claims that the mean annual income is greater in one of…

A: (a)  The claim is that the mean annual income of county A is greater than the mean annual income of…

Q: 5. 1. 2. 4. Data Sheet Capacitance -- Procedure III Capacitors in Series Capacitors in Parallel…

A:

Q: The data in the following table represent the results of two samples of students taken from a…

A: There are two independent samples which are experimental and control. We have to test whether there…

Q: The average score on a statistics test was 2.52 with a standard deviation of 0.75. The teacher…

A: Given : E(x) =2.52, SD(x) =0.75 Var(x)=0.752 =0.5625 New score is y=ax+b Such that : E(y) =3.58…

Q: A manufacturer of metal plates makes two claims concerning the thickness of the plates they produce.…

A: As per the honor code, We’ll answer the first question since the exact one wasn’t specified. Please…

Q: Can you assist me in answering this? I do not receive results, and it would be helpful to know if I…

A:

Q: A student conducts an experiment on high temperature steel. The student takes an initial set of 20…

A: Given, Sample size = n = 20 Sample mean = x = 660 Sample standard deviation = s = 15.3 x = 600…

Q: A researcher wants to see if there is a difference in APGAR scores of newborns depending on whether…

A:

Q: Waterfall Heights Is there a significant difference at α=0.10 in the mean heights in feet of…

A: Europe Asia   487 614   900 350   1246 722   1312 320   1385 830   1066 567.2 Mean…