It is known that the weights of male Persian cats are normally distributed with mean 6.1 kg and variance 0.5² kg². (a) Sketch a diagram showing the above information. (b) Find the proportion of male Persian cats weighing between 5.5 kg and 6.5 kg. A group of 80 male Persian cats are drawn from this population. (c) Determine the expected number of cats in this group that have a weight of less than 5.3 kg.

Q: A school administrator wants to see if there is a difference in the number of students per class for…

A: Public School district Sample size, n1=26 Sample mean, x¯1=35 Sample sd, s1=2   Beaverton School…

Q: School district (group 1) compared to the Beaverton School district (group 2). Assume the ations are…

A: Given Group 1 n1=26 Xbar1=33 S1=6 Group 2 n2=25 Xbar2=36  S2=2

Q: An experiment was conducted to compare the difference in weight loss between aerobics (group 1) and…

A: Given: x¯1=5.7       x¯2=3.5s1=1.9       s2=0.7n1=27        n2=30

Q: A sample of 6400 cases is drawn at random from a large population. The Variance is 100. Calculate…

A: Sample size, n = 6400 Variance = 100 Standard deviation = VarianceStandard deviation = 100Standard…

Q: Find a 99% confidence interval in the difference of the means. Use technology to find the critical…

A:

Q: Professor Smith took a sample of 210 students from her morning class and a sample of 163 students…

A: We have to find combined mean(average), combined median and combined standard deviation in this…

Q: Use the Z table to find the probability associated with the following area under a normal curve

A: Since , the Z-scores are given. Our aim is to find the probability Here , we use the standard normal…

Q: ) If the probability of a student receiving financial aid is 0.72, find the mean and variance of the…

A: Given: probability of a student receiving financial aid is 0.72 p=0.72 number of students(n)=40000

Q: A petroleum engineer estimated the chances of drilling a dry well to be around 50% , and chances of…

A: The probability distribution of the amount of oil and the associated probability of drilling is as…

Q: Suppose samples are taken from a population of heifers with known mean and standard deviation of…

A:

Q: A supplier sells ropes. He claims that the ropes have a mean strength of 34 pounds and a variance of…

A:

Q: A school administrator wants to see if there is a difference in the number of students per class for…

A: using excel we find critical value

Q: The manager of a night club in Boston stated that 95% of the customers are between the ages of 22…

A: It is an important part of statistics. It is widely used.

Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…

A:

Q: A researcher has collected the following sample data: 3, 5, 12, 3, 2. The mean of the sample is 5.…

A:

Q: If the number of dust particles in a square meter on a surface follows a Poisson distribution with a…

A:

Q: 12) If the standard deviation of a data set is (17.2); the variance will be (295.84).   Select…

A:

Q: If a set of data is normally distributed with a mean of 20 and a variance of 16, a z-score of -3.8…

A: Let raw score is X.  Then Z Score is given by, Z= (X- mu)/sigma Where mu is mean  And sigma  is…

Q: A sample has n = 16 scores,  a mean of M = 45 and has an estimated standard error of 4 points (sM  =…

A: Given information is  A sample has n = 16 scores, a mean of M = 45 and has an estimated standard…

Q: Suppose that house prices in a city (measured in thousands of dollars) are normally distributed with…

A: It is required to find the z-score for a house price of 333 units.

Q: A school administrator wants to see if there is a difference in the number of students per class for…

A: The confidence interval measures the range where the true parameter occurs. It has two parts, they…

Q: A school administrator wants to see if there is a difference in the number of students per class for…

A: The confidence level is 99%. The degrees of freedom is 40.3378. Computation of critical value: The…

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: Suppose that the City of Chicago is interested in potential revenues if they introduce a tolling…

A: Here the given information is Suppose that the City of Chicago is interested in potential revenues…

Q: A Random Sample Of Size 25 Is To Be Selected From A Normal Population Having A Mean Of 81 And A…

A: Given that Population mean=81 Variance =9

Q: Mr Chimbukutu, owner of a bakery said that the average weekly production level  of his company was…

A: We have given that  Mean(µ) = 11398 Standard deviations (σ) = √ 49729 = 223

Q: Given that age of ECU students is normally distributed. A random sample of 16 students had an…

A:

Q: When using analysis of variance , the calculated F statistic will decrease as A) the variability…

A: F-statistic: F-statistic=MS(Among groups)MS(within groups) In general, the calculated F statistic…

Q: Give a 99.8% confidence interval, for ₁ - 2 given the following information.

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: You are asked to calculate the 94% Cl for the mean value of a normally distributed population with…

A:

Q: A group of students (large group) took a test in mathematics and the final scores have a mean of 68…

A: Given Data: Let X represent the final scores  Mean(X)=68 Var(X)=100 SD(X)=10 X~ Normal (68, 100)

Q: In the experiment of A and B consumers, 12 sample points are set for A consumers, and the average…

A: The null and alternative hypotheses are stated as follows: The pooled variance is computed as…