An insurance company has two types of customers: high risk customers, whose loss amounts have mean 20 and variance 50, and low risk customers, whose losses have mean 10. The expected amount of randomly chosen loss is 14, and the variance of a randomly selected loss is 62. Find the variance of a loss for a low risk customer.

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If three of the five observations are…

A: Given: Number of observations (n) = 5 Mean x¯=4.4 Variance (s2) = 8.24 The three observations are 1,…

Q: Please show all work by hand. do these two groups have equal variance? group A : 14.32, 14.56,…

A: We want to find variance for both group

Q: 下riday Day of the Week no. of unit sol0 mon tue wed 4 Thu Sat dNT 3 Sunday 3.

A: Solution-: Let, X-be the number of unit sold We have following table: Day of the week X Monday…

Q: Suppose a population has three values 13, 17 and 24. What is its variance?

A: Given: n=3 The mean of the data is obtained as below: Mean=∑xn=13+17+243=543=18 The mean is 18.

Q: In a certain population, the mean price of the stock prices was 230, the median was 262, the…

A:

Q: One way to evaluate the effectiveness of a teaching assistant is to examine the scores achieved by…

A: Given Sample size, n=30 Sample variance, s2=480 Population variance, σ2=300

Q: In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the…

A: There are 3 independent samples which are Goliath, Varmint and Weasel. We have to find the variance…

Q: Suppose when a data set with 32 values is treated as a "population", the value of the (population)…

A: Given that  Population Variance = 145.2  n = 32

Q: b) The following table shows the time students from a college took to complete a marathon. Time…

A:

Q: Find the variance of the number of storms in August.

A: X: Number of thunderstorms in August.

Q: State the properties of Co- variance;

A:

Q: If 50 and 70 are the two elements of a population data set and their z-scores are -2 and 3,…

A: For  X=50, Y=70  Z score= -2 and 3 for point X and Y

Q: he density netion of the cont variable X, the total number of hours, in units of 100 hours, that a…

A: We want to find average and variance.

Q: A medical researcher is trying to determine whether the population variances of systolic blood…

A: n1 = 28n2 = 25S12 = 97.770S22 = 122.960

Q: the variance of a data set is 144 and mean is 72 then coefficient of variance is

A: Given,variance(σ2)=144mean(x¯)=72

Q: A report from the National Center for Health Statistics for 2010 showed that 20% of the adult…

A: The objective of this question is to find the average number of adult smokers in a sample of 25…

Q: A researcher wishes to test if the variance of scores on a particular exam is the same for college…

A: The given hypothesis is H0:σA2σB2=1 Versus Ha:σA2σB2≠1

Q: 6.34 As in Exercises 6.6, 6.10, and 6.20, in a study of the particulate pollution in air samples…

A: Given that, the joint pdf of X and Y is,  f(x,y)= 1  ; 0<=x<=2 ; 0<=y<=1  ; 2y<=x…

Q: A researcher is trying to determine if racial background affects income. In a sample of 100 people,…

A: From the above data What proportion of the variance in income can be explained by racial background…

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If the three of the five observations…

A:

Q: A researcher wishes to test if the variance of scores on a particular exam is the same for college…

A: The question is about hypo testing Given : No. of obs. under grp. A ( nA ) = 47 No. of obs. under…

Q: There are two groups of policyholders for an insurance company: Group A and Group B. For Group A,…

A: Given data  group A :                              group B :  μA = 140σ2A = 400…

Q: The average lateness for one of the top airline companies is 10 minutes. The variance of the…

A: Given,mean(μ)=10standard deviation (σ)=9  =3and X=13

Q: The purchase value of transactions at a grocery store is normally distributed with a mean of $244…

A: Consider X be a random variable which follows normal distribution indicates the purchase value of…

Q: The variance is sometimes a negative number.

A:

Q: State the formula for Variance.

A: Equation that defines the population variance σ2=∑(X-μ)2N Here, σ2 is variance, (X-μ) is distances…

Q: A given set of data has a specific variance. Describe what will happen to the variance when all the…

A: Suppose, data is X=(10,15,20,25,30)

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 foreman at a large plant estimates that there are defective parts about 1% of the time.  If the…

A: It is given that n =20,000 and p = 0.01.

Q: Calculate the Average and the variance

A:

Q: If the probability that an object dropped from a certain height will strike the ground is 80 percent…

A: Solution- Given that , let p denote the probability that an object dropped from a certain height…

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 bakery sells homemade bread by the loaf and sales are uniformly distributed between 200 and 600…

A: Hello! As you have posted 2 different questions, we are answering the first question . In case you…

Q: find the variance for the given data 7 7 2 5 1

A: The mean of the data can be calculated as:

Q: * 2.4.5.6-8-17 11 17 20 24 32 Xị 3 5 9 3 fi 1. 4) 5n 00

A: As per our guidelines we are suppose to answer only one question1)Given data set is…

Q: Find the variance for the given data, 15,3,6,18,17

A: Answer: From the given data, 15,3,6,18,17 Sample size(n) = 5

Q: It is possible to have a variance of 625,000625,000 for some data set. true or false

A: The question is asking whether it is possible for a data set to have a variance of 625,000.

Q: For the given data. Find 24, 26, 23, 25, 27

A: