The table below shows relative frequency distribution for 50 employees working in a small construction company classified according to their years of experience, the approximate value :of variance is Years of Relative experience Frequency of Employees 5-10 0.3 11. 16

Q: Green sea turtles have normally distributed weights, measured in kilograms, with a  mean of 134.5…

A: The z score indicates how many standard deviations that a data points away from the mean. It can be…

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: a sample of Computer usage for 40 studente showed a sa mphe Mean of 6.2 hours, If we know that J =…

A: Given data, Sample = 40 sample mean = 6.2 population standard deviation = 2.4 Confidence interval =…

Q: The following table shows the results of an analysis of variance comparing four treatment condition…

A: Obtain the missing values in the ANOVA table. The missing values are obtained below as follows :…

Q: A researcher wants to know if there is a difference between the mean amount of sleep that people get…

A: The ANOVA is conducted by using EXCEL. The software procedure is given below: Enter the data.…

Q: A researcher would like to determine if relaxation training will affect the number of headaches for…

A: Solution: A. The difference scores are calculated as follows: The mean of difference scores is B.…

Q: The mean weight of 1000 students at a certain high school is 140 pounds and the variance is 100…

A:

Q: A population of marine gastropods has shell lengths that are normally distributed with a mean of 7…

A: We have to find given probability.

Q: Suppose it is believed that the probability a patient will recover from a disease following…

A: Here we need to find the mean and variance of the given binomial distribution.

Q: Assume the mean height of soldiers to be 68.22 inches with a variance of 0.8 inches. How many…

A:

Q: The following table shows the results of an analysis of variance comparing four treatment conditions…

A: It is given that, four treatment conditions. That is there are 4 groups. Each treatment has 6…

Q: A rowing team consists of three rowers who weigh 162, 166 and 170 pounds. Fihd all with replacement…

A: Given population = 162, 166, 170 Population size = 3 Sample size = 2

Q: A boat capsized and sank in a lake. Based on an assumption of a mean weight of 138 ​lb, the boat was…

A: Given, A boat capsized and sank in a lake. Based on an assumption of a mean weight of 138 ​lb, the…

Q: is also called as the 'Average of the first order'. О а. Меan O b. Variability O C. Median O d. Mode

A: We have to find correct answer for given data..

Q: The following table is the frequency distribution for the amount 'screen time' (in hours) had each…

A: Solution-: Given data table: Screen Time Freq (fi) 0-4 16 4-8 18 8-12 14 12-16 2 We…

Q: The following table is the frequency distribution for the amount 'screen time' (in hours) had each…

A:

Q: The following table shows the results of an analysis of variance comparing four treatment conditions…

A: Given, There are four treatment conditions with sample n=6. That is k=4 N=4x6 =24 Total df= N-1…

Q: As the sample size increases, the variability among the sample means increases decreases remains the…

A: Concept: Variability in a data represent how dispersed data is from its mean.

Q: li is known that the weights of male Persian cats are normally distributed with mean 6.1 kg and…

A:

Q: The image database was collected through a questionnaire from a software engineering course.…

A: From the given information, It is required to compute the variance , standard deviation and…

Q: how large of a sample is required to estimate the mean usage of electricity? Round your answer up to…

A: Given, Margin of Error (ME) =0.1Variance =σ2=4Mean = μ = 19.6

Q: Refer to the data in images.  Test for a significant difference in the variances of the initial…

A: Solution: It is asked to test the claim that is there a significant difference in the variances of…

Q: Is there a significant difference at =α0.01 in the mean heights in feet of waterfalls in Europe and…

A: State the Null and Alternate Hypothesis.

Q: In a herd of cattle, the mean milk production is 160 lbs per day with a variance of 400 Ibs per day.…

A: Given that the mean milk production in the cattle is,  μ=160 lbs per day & with a variance,…

Q: Use an analysis of variance with α = .05 to determine whether these data indicate any significant…

A: For the given data Perform Anova single factor

Q: The average depth of the Hudson Bay is 305 feet. Climatologists were interested in seeing if the…

A: The random variable depth of the Hudson Bay follows normal distribution. We have to test whether the…

Q: The table below shows relativ frequency distribution for 50 employees working in a sma construction…

A: The Variance of the frequency distribution is given as                              Variance…

Q: The scores in a high school are normally distributed with a variance of 225. Suppose that 27.43% of…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: a sample of 60 grade 9 student age was obtained to estimate the mean age of all grade 9 students. x…

A: A sample of 60 Grade 9 students' ages was obtained to estimate the mean age of all Grade 9 students.…

Q: The table below shows relative frequency distribution for 50 employees working in a small…

A:

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: Two accounting professors decided to compare the variance of their grading procedures. To accomplish…

A: Hint:  Sine we need to find the critical value, we can find it easily from the f- table.

Q: of various intensities and frequencies. Of these 45 listeners, 15 had normal hearing, 15 use at low…

A: Given the summary data as Groups  Sample size Sample mean Sample variance Normal hearing 15…

Q: Fatteners have normally distributed weights, measured in kilograms, with a mean of 134.5 kg and a…

A: Let us denote X= weight of fatteners   Given that X follows a normal distribution with mean= 134.5…

Q: c) The Shelf life of a particular dairy product is normally distributed with a mean of 12 days and a…

A: Obtain the percentage of the products last between 13 and 16 days. The standard z-score for the…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: In statistics, variance is the average squared distance of each data points from the population…

Q: Use the frequency distributions and histograms for weekly usage and waiting time in the car sharing…

A: Given, Use the frequency distributions and histograms for weekly usage and waiting time in the car…

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

A: Given : n = 39 x¯ = 4.6982 s = 0.39623

Q: a) Find the mean of p, where p is the proportion of defective light bulbs in a sample of 4400 when…

A: From the given information we find the solution.

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: The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The…

A: We have given that  Average and variance for newspapers.  Average = 12 Variance = 25 Standard…

Q: The mean age of children at the X College daycare center is 6. The ages are skewed in a negative…

A: μ=6 σ2= 5.1

Q: The data in the following Table 3 represent the number of hours of relief provided by five different…

A: The objective of this problem is to perform the analysis of variance and test the hypothesis at 0.05…

Q: The weekly income for a taxi driver during the first three weeks of lock down were recorded as…

A: Given, The weekly income for a taxi driver during the first three weeks of lockdown was recorded as…

Q: Suppose that the time in minutes it takes a student to complete an assignment is normally…

A:

Q: Suppose that the time in minutes it takes a student to complete an assignment is normally…

A: Solution: Let X be the time it takes a student to complete an assignment. From the given…

Q: Experience has shown that a grade in MAT 2371 is normally distributed with mean 66 and variance 64.…

A:

Q: The following table shows the results of an analysis of variance comparing four treatment conditions…

A: Given : SSbetween  = 88SStotal = 112

Q: The electric cooperative needs to know the mean household usage of electricity by its non-commercial…

A: Given, Margin of error (E) = 0.1 kWh Variance (σ2) = 6.25 kWh Level of significance = 98% The z…

Q: The electric cooperative needs to know the mean household usage of electricity by its non-commercial…

A: Obtain the critical value: The level of confidence is 1- α = 0.90. The critical value is obtained as…