A company producing air conditioning units should decide how many units have to be tested for quality purposes. The data is normally distributed with a mean of 108 and a variance of 34. How large must the random sample be if he wants the standard error of the sample average to be 1.5? а. 13 O b. 16 О с. 22

Q: the following is expected if the null hypothesis is rejected for an analysis of variance? a.…

A: The formula of F-statistics of the ANOVA test is,  F=MSbetweenMS within

Q: If the standard Z value of a random Ferdin drawn from a normal distribution populason with an…

A: Given  Mean=mu=80 Variance=sigma^2=400 Z=1.2

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

A: Given: The provided data is:   Mean Variance Professor 1 79.3 22.4 Professor 2 82.1 12.0

Q: A juice factory buys apple concentrate from two different suppliers. The mean concentration is the…

A: F-test of equality variances is a test for the null hypothesis  that two normal populations have the…

Q: A sample of n=4 scores has SS=60. what is the variance for this sample?

A:

Q: If X is normally distributed with a mean of 6 and a variance of 25, P(|X-6|<5) P(|X-6|<10)…

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

Q: Two plots at Rothamsted Experimental Station were studied for production of wheat straw. For a…

A: Given:   One Plot Second Plot 6.4 7.1 7.03 7.03 7.17 8.15 6.96 5.91 7.31 7.22 7.18…

Q: d) If the variance is 120 1b, what sample size is necessary to estimate true yield point to be…

A: Given that  Variance  ?2=120 Margin of error =E =3 99% confidence.

Q: Assume two populations, one of size 15 and variance 12 and the other one of size 10 and variance…

A: Given, n1=15, n2=10, σ12=12, σ22=7.6 The combined standard deviation is given by,…

Q: An independent-measures study produces sample means of M1 = 20 and M2 = 17. If both samples have n =…

A: An independent-measures study produces sample means of M1 = 20 and M2 = 17. Cohen’s d = 0.50

Q: A random sample of the number of games played by individual NBA scoring leaders is shown. Is there…

A: The mean and variance is calculated as follows:

Q: Two plots at Rothamsted Experimental Station were studied for production of wheat straw. For a…

A: The given information is that the sample variance for annual wheat straw production for one plot is…

Q: A social geographer wants to know whether the mean length of unemployment differs among the…

A:

Q: Consider a study in which the sum of squares based on an experimental group of 10 participants is…

A: Pooled variance:The pooled variance is given by,

Q: Suppose that a random variable X is normally distributed with a mean of 200 and a variance of 625.…

A: We have given that the random variable X is normally distributed with mean 200 and variance 625.…

Q: For the following two samples of scores, calculate the pooled variance from an Independent-Samples…

A:

Q: population of N = 5 scores has a variance of σ 2 = 24. If the scores were from a sample, what value…

A:

Q: Two samples, one with n = 2 and another with n = 3, have a pooled variance of s2p = 30. The…

A:

Q: A simple random sample of heights of 6400Englishmen has a mean of 67.85 inches and SD 2.56 inches,…

A: Since the sample size is large so we can assume normality.Null hypothesis: H0: Australians are same…

Q: If an analysis of variance is used for the following data, what would be the effect of changing the…

A: The given sample data is as follows: M1 = 15, M2 = 25, SS1 = 90, and SS2 = 70. The value of M1 is…

Q: For a sample of n=36 that has a variance of 1296, what is the estimated standard error for the…

A: Given: Sample size (n)= 36 Variance = 1296

Q: For a sample of n = 11 scores with SS = 440. What is the sample variance and the estimated standard…

A: Sample  Variance s2 = SS/n-1 Estimated standard error sM = s/sqrt(n).

Q: A sample of n = 16 scores has a mean of M = 40 and a variance of s2 = 128.  What is the estimated…

A: It is given that the variance is 128 and the sample size is 16.

Q: A sample of n = 4 scores has a variance of s2 = 64. What is the estimated standard error for the…

A:

Q: To evaluate the effect of a treatment, a sample is ob- tained from a population with a mean of u=…

A:

Q: A scrap metal dealer claims that the mean of his cash sales is 'no more than R80', but an Internal…

A: μ=80, n=20, x̄=91, S2=441

Q: Indicate the mean and the standard deviation of the distribution of means for each of the following…

A: We have to find mean and the standard deviation of the distribution of means for given situations.So…

Q: pooled variance of this study is

A: Given sum of square based on 1st experimental Group isS12=70n1=10SimilarlySum of square based on 2nd…

Q: An independent-measures study produces sample means of M1 = 20 and M2 = 17. If both samples have n =…

A: The formula to obtain the Cohens’d formula is,

Q: Without calculations, which of the following sets of numbers would have a larger variance?

A: Variance is a measure of dispersion. In other words, how much dispersed the data set is.

Q: the standard Z value of a 16-unit sample taken randomly from a normal distribution populason with an…

A:

Q: A sample of 60 items from population 1 has a sample variance of 8 while a sample of 40 items from…

A: Given S1^2=10 S2^2=14

Q: 3. For a normal population with a mean of 20 and a variance IU, None of the other 0.25 0.50 0.35

A: Answer: 3- Given a normal population with mean μ  = 20  and variance σ2  = 10                   Find…

Q: A medical researcher wishes to see whether the variance of the heart rates (in beats per minute) of…

A: It is given that the variance of the heart rates of smokers is 32 and the variance of the heart…

Q: You know that the sample mean, X. is the minimum variance unbiased estimator of . with a variance of…

A:

Q: From a population with a variance of 900, a sample of 225 items is selected. At 95% confidence, what…

A: Given,

Q: Suppose that a refrigeration process at Coolfood, Ltd. has a normally distributed output with a mean…

A: Answer: Cp=1.00606

Q: Two samples, each with n = 5 scores, have a pooled variance of s 2 p = 40. What is the estimated…

A: Two samples, each with n = 5 scores, have a pooled variance of s 2 p = 40.

Q: We are interested in determining whether or not the variances of the sales at two music stores (A…

A: Suppose the variance of sales of store A (1st population) is σ12 and the variance of sales of store…

Q: A plant pathologist wants to compare two strains of bacteria in terms of its reproduction rate. Test…

A: Here we have to test a plant pathologist wants to compare two strains of bacteria in terms of its…

Q: Assume the mean and variance of 5 observations are 1 and 5, respectively. If 5, as one of these five…

A: Given : mean = 1 variance = 5

Q: The following is a sample of patient's calcium tests in mg/dL.  9.3 8.8 10.1 8.9 9.4 9.8 10.0 9.9…

A: The descriptive statistics for the given data are calculated by using excel.

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

A: Solution

Q: Assume that you have a binomial experiment with p= .3 and a sample size of a 100. The value of the…

A: Conider a binomial random variable "X". The variance of the random variable X is given by:

Q: (a) Calculate n . s for these data, the mean of the variances of the four samples and the value of…

A: Given Data :   Variety A Variety B Variety C Variety D   65 55 56 62   64 56 59 59   60 63…

Q: A sample of n = 64 scores has a mean of M = 45 and an estimated standard error of 3 points. What is…

A: According to the given information in this question We need to calculate the sample variance

Q: wo plots at Rothamsted Experimental Station were studied for production of wheat straw. For a random…

A: We are authorised to answer three subparts at a time since you have not mentioned which part you are…

Q: sample with SS=30 and a variance of s2 =10 has n=4 scores. True or False?

A: Given that  Sum of squares (SS) = 30 Variance ( s2) = 10 Sample size (n) = 4   We know that…

Q: A study estimated that the percentage of women living in refugee camps in the West Bank who have…

A: Given : p = 0.19 sample size, n = 15

Q: From a population of 500 elements, a sample of 225 elements is selected. it is known that the…

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.