Current estimates suggest that 55% of the home-based computers in a foreign country have access to on-line services. Suppose 15 people with home-based computers were randomly and independently sampled. The mean of the distribution is and the variance of the distribution is

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: (a) Use the 0.02 level of significance to test the hypothesis whether it is reasonable to assume…

A:

Q: If an analysis of variance produces a value of F = 1.00, then all the samples have the same mean.…

A: We know that- The value of F is the ratio of two mean squares. When the value of F = 1, then there…

Q: An electronics company manufactures resistors that have a mean resistance of 105 ohms and a variance…

A:

Q: a financial executive believes that each savings account customer has, on average, two credit cards.…

A: Given Information: X 0 1 2 3 4 P(x) 0.08 0.50 0.05 0.19 0.18 To find the mean, variance and…

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: A sample of n = 20 scores has a M = 20 and a variance of 9. What is the standard deviation?

A:

Q: Given the set of numbers: {1, 4, 3, -4}, find their variance and standard deviation. [Hint: For…

A:

Q: In a normal distribution, 11% of the items are under 35 and 76% are under 83. Find the mean and…

A:

Q: For the above distribution (-1,0,1), what is the sample variance?

A: Use the given data to form the excel table:

Q: Please calculate the variances, Var(X) and Var(Y), and the corresponding standard deviations for the…

A: …

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

A:

Q: A sample of n = 9 scores has SS = 200. What is the variance for this sample?

A:

Q: A sample of n = 26 scores has SS = 125. What is the variance for this sample ?

A: According to the given information, we have SS = 125 n = 26

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: A history class has 75 members. If there is a 12% absentee rate per class meeting, find the mean,…

A: It is given that n is 75 and p is 0.12.

Q: Assume that you have a binomial experiment with p = 0.4 and a sample size of 120. What is the…

A: Given that, From binomial experiment, Probability, p = 0.4 Sample size, n = 120

Q: During a recent CD sale at Matt's Music Store, the number of CDs customers purchased was distributed…

A:

Q: When the mean is smaller than the median, and the median is smaller than the mode, the distribution…

A:

Q: Give the mean and the standard deviation of the distribution of means for mean=100; Variance=100;…

A:

Q: A recent article reported “A one-way analysis of variance found that GRE scores varied according to…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

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

A: Given information Sample Data M1 = 10      M2 = 15 SS1 = 90    SS2 = 70 SSWithin is given by…

Q: A relatively new breed of cat that first appeared in China frequently suffers from joint problems.…

A: Given Information: A new breed of cat that first appeared frequently in China suffers from joint…

Q: The average age of a car registered in the Land Transportation Office is 10 years or 120 months.…

A: Sampling Distribution of a Normal Variable :  Given a random variable X. Suppose that the population…

Q: For the distribution (-1,0,1), what is the sample variance?

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

A: Given M1=20, M2=17 and Cohen's d=50.   It is known that      where  sp2 is the pooled variance.

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: For the following distribution -1,0,1, what is the sample variance?

A: Here the sample size is N=3 The mean of the sample is, μ=1N∑i=1NXi=-1+0+13=0

Q: An experiment consists of rolling a eight-side doe (numbered 1 through 8) and observing the number…

A: Let X be a random variable denoting the the number that appears at the uppermost. x 1 2 3 4 5 6 7…

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: When calculating an independent-samples t test, the pooled variance is:

A: Given: Independent sample t-test.

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

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: Find the range, variance, and standard deviation for the given sample data, if possible. If the…

A:

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

A: Given,

Q: In an effort to counteract student cheating, the professor of a large class created four versions of…

A:

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A: Solution

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

A: Given: M1=10M2=15SS1=90SS2=70 Changing the value of M2 to 20

Q: Consider a population with variance 41 and mean 1. What is the z-score for a the value x = 20? Round…

A: Given: Variance= 41 Mean =1 To find: z-score for the value x=20

Q: Suppose X has a normal distribution with mean 135 and variance 36. Find the 67th percentile of the…

A: The 67th percentile of the distribution of X is, PX<x=0.67PX-μσ<x-13536=0.67Pz<x-1356=0.67…

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: Assume that you have a binomial experiment with p = 0.4 and a sample size of 50. The variance of…

A: X be a random variable that follows binomial distribution with probability of success 0.40 and…

Q: (b) Suppose that the test for equal variances in (a) concludes that the two populations have…

A: Hypothesis testing is an inferential procedure in statistics.

Q: A population of N = 10 scores has µ = 21 and σ = 3. What is the population variance?

A: From the given information

Q: D. Tell whether the distribution has a small or large variance E. Compute the actual variance and…

A: Answer:-----.                                     Date:----27/09/2021

Q: A company producing air conditioning units should decide how many units have to be tested for…

A:

Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.