Thirty percent of the students in a class of 100 are planning to go to graduate school. The Variance of this binomial distribution is: A. 16 B. 21 C. 25 D. 36

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

A: a. Formula: Common population variance is obtained by pooling the sample variances given by using…

Q: In a chemical process control system, volume of a particular liquid measurement is said to be…

A: The mean volume is calculated as μ=Sum of 20 measurements20=100020=50ml and the standard deviation…

Q: Of all the registered automobiles in Colorado, 10% fail the state emissions test. Nine automobiles…

A: Probability, p =10% Sample size, n = 9

Q: a. Three fertilizer treatments, A, B, C, each applied to seven plots of strawberry plants, resulted…

A: The method Analysis of variance is used to determine the significant mean difference between 3 or…

Q: Fourty six percent of the students in a class of 150 are planning to graduate school, Find the…

A: Answer: From the given data, Sample size(n) = 150 Forty six percent of the students are planning to…

Q: What is the variance? 3.7 4.1 3.2 4 3.8 3.6 3.7 3.4

A: Given:The data values are as follow:3.7, 4.1, 3.2, 4, 3.8, 3.6, 3.7, 3.4

Q: t of the Student t distribution, the shape of the chi-squared distribution depends on:   A. the…

A: The density curve of the chi distribution is not symmetric. The value of chi square test statistic…

Q: Given a binomial variable with a mean of 30 and a variance of 21, what is p?

A: X~Binomial(n , p) Mean=30, Variance=21

Q: The following data set represents the ages of all 6 of Nancy's grandchildren. 11, 8, 5, 6, 3, 9 Find…

A: The number of observations, n=6. The mean is calculated below.

Q: Assume them to be a random sample from a normal population. Perform a hypothesis test at alpha =…

A: It is given that Sample size n = 10 Level of significance = 0.05 Test is that whether the variance…

Q: Q6: The following data show the number of hours spent watching television for 12 randomly selected…

A:

Q: Find out the variance for the following data. 22,       18,       25,       15,       30   a.…

A:

Q: The number of employees, wages per employee and the varlance of the wage per employee for two…

A:

Q: r the data above, what is the pooled variance? (Hint: you must first find the variance for each )

A: Given : For  group A given data : 12,10,7,7,8,5

Q: a survey examining health-related behaviors among university students, 200 participants were asked…

A: Calculate Sample Variance (S2) from the following grouped data X Frequency 0 145 2 25 5 20…

Q: A set of 5 scores has SS = 20. If the scores are from a sample, the sample variance is ____. If the…

A: Given ,         Sample size n=5          and S.S = 20Sample variance = S.Sn-1=205-1=204=5∴ Sample…

Q: State the properties of Co- variance;

A:

Q: The average stock price for a company is $30, and the variance is 67.24. Assume that the stock…

A: It is assumed that the stock prices follow normal distribution. The mean stock price is $30 and…

Q: Suppose the variance of X is 95. What is the variance of .09X?

A: The objective of this question is to find the variance of a variable that has been scaled by a…

Q: A manufacturer produces a commodity where the length of the commodity has approximately normal…

A: The objective of this question is to find the probability that the sample's mean length is greater…

Q: A Hollywood studio believes that a movie that is considered a drama will draw a larger crowd on…

A: Given ,For drama : n == 16 180 = 50 For comedy : n = 12 130S = 30We have to Calculate a 99%…

Q: Which of the following data sets would have the smallest variance?       700      701      702…

A: The question is about measures Introduction : Variance - A variance is nothing but mean of sq.…

Q: For an analysis of variance comparing six treatment means with a separate sample of n = 7…

A: From the provided information, Number of treatment (k) = 6 Number of participants in each treatment…

Q: In an analysis of variance, which value is determined by the size of the sample variances? a.…

A: We have given that the statement about to the ANOVA.

Q: Thirteen percent of U.S. employees who are late for work blame oversleeping. You randomly select…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: Suppose the variance of X is 33. What is the variance of .23X?

A: Given,Var(X)=33 we know that Var(ax)=a2Var(X)

Q: Four salesman were posted in difference areas by a company. The number of units of commodity x sold…

A: Given: Test-statistic F = 3.89 Rejection region: If Test-statistic > Critical value, Reject H0.

Q: The ages (in years) of a random sample of shoppers at a gaming store are given below: 12 21 23 15 20…

A: Observation: XX X^2X2 1 12 144 2 21 441 3 23 529 4 15 225 5 20 400 6 16 256 7 19 361…

Q: Consider throwing a die 20 times. Let X be the number of times th outcome is less than 3. Find the…

A: Given that  n=20  , p=2/6=1/3 , q=1-p=1-(1/3)=2/3 X=Number of times the outcomes less than 3…

Q: Two samples of scores on a survey are as follows: Sample A: 10 7 6 8| 7 19 Sample B: 18310 112 7 25.…

A:

Q: 5 The variance of the sample data is, a 58.773     b 57.061     c 55.400     d 53.786

A:

Q: A researcher wants to determine if the number of years of education for a parent correlates with the…

A:

Q: Two samples, each with n = 6scores, have a pooled variance of 18. What is the estimated standard…

A: The pooled variance is 18.

Q: Consider the five-product line produce products with the same weight (grams). Test the hypothesis of…

A: If there is homogeneity of variance then we use the Bartlett test. Here we check whether the…

Q: In the formula for an analysis of variance, we want between-group variance to be and within group…

A:

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

A: Given data:     Tablet     A B C D E 5.2 9.1 3.2 2.4 7.1 4.7 7.1 5.8 3.4 6.6 8.1 8.2 2.2…

Q: Quarter Quarter Quarter Quarter A C D 130 18 90 25 What is the sample mean and variance (in that…

A: Given Data :

Q: Suppose bob flips a fair coin 100 times.Let X be the number of heads he gets.What is Variance of X?

A: For a fair coin the probability of getting head= 0.5X=number of headsn=sample size=100p=probability…

Q: Find the variance for the binomial distribution, P=0.87 and n= 32

A: Answer: From the given data, P = 0.87 n = 32 X follows binomial distribution (n,p)

Q: Before a random sample has been drawn, which of the following is true? I. II. III. The sample…

A: The correct option is I only.

Q: Hollywood studio believes that a movie that is considered a drama will draw a larger crowd on…

A: n1=10,x1¯=160,s1=30n2=15,x2¯=140,s2=10