b) The following table shows the time students from a college took to complete a marathon. Time (minutes) 30-32 33-37 38-44 45-47 Frequency 9. 14 3 a Frequency Density 3 4 b i) ii) iii) iv) Find the value of a and b. Calculate the mean time Calculate the mode Calculate the variance

Q: The profit for a production process is equal to $2,000 minus two times the number of units produced.…

A: Consider X is the number of units produced Here, Y = 2000-2X It is known that E(X) = 500, Var (X) =…

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: 6. A class for engineers consists of 25 industrial, 10 mechanical, 10 electrical and 8 civil…

A: The answer is attached below,

Q: The variance of the data :. 6 ,6 ,-6,-6 is equal to

A: Find variance of the data  6 ,6 ,-6,-6

Q: Use the boxplot for radio station B to say whether the data are symmetric or skewed. If the data are…

A: Given the data and box plot for Radio station A and B.  We have to Use the box plot for radio…

Q: 5. With height from 150 cm to 200 cm 6. With height less than 172 Formula: | z =

A:

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: 2 1 4 0.5 1

A:

Q: (b) The number of red balls in a sample of 8 balls chosen at random from a box contains 30 balls of…

A: We have to find the mean and variance of Hypergeometric distribution.

Q: 10. The price of a gallon of milk at various stores is normally distributed. The price of a gallon…

A:

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

A: X: Number of thunderstorms in August.

Q: Find the median of the data. 70 75 70 84 90 92 84 85 80 60 72 78 80 81 72 79 78 76 86 O 74.7 O 78.5…

A: We know that  n= 20 , even  Median =( n/2th + (n/2 + 1)th ) / 2

Q: Given the data set, show how the variance and z-score of each grade is found.

A: Variance is the measure of dispersion. It provide the deviation of data set from the mean. It is…

Q: Find the variance of X X: 73,51,73,182,45,90,111

A:

Q: 1. Let W be a random variable giving the number of heads minus the number of tails in three tosses…

A: Probability: The probability tells the chance or possibility of an incident whose outcome is not…

Q: Yi = 5,25,50,100,200.

A: Given data isYi = 5,25,50,100,200

Q: Use the probability distribution to complete parts (a) and (b) below. The number of defects per 1000…

A: mean=μ=E(X)

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: 2. A shipment of 7 television sets contain 2 defective sets. A hotel makes a random purchase of 3 of…

A: I solved exactly first question because of bartleby policy if you want more please upload…

Q: antile plot for the data in the accompanying table. Then determine whether the data com

A: Provided data: Duration 281 92 235 165 262 54 224 266 237 197 172 326…

Q: 4. Remember that survey question you wrote? Take the class responses to your survey as data related…

A: Correlation coefficient is used to measure the strength of the linear relationship between the two…

Q: Consider the following frequency table. Frequency 8 4 15 7 21 10 28 11 3 Write down the mode. 2.

A: Using the formula of variance.

Q: The variance is sometimes a negative number.

A:

Q: | X*-PCx) Number of Boxes I probability x- P) of breads x PCx) 0.20 0.25 10 15 0.30 20 0.15 0.10…

A:

Q: Determine the mean of X.Determine the mean of Y Determine the variance of X. Determine the…

A:

Q: The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.4 parts per…

A: Suppose μ is the population mean level of the chemical in tomatoes from the producer.

Q: Calculate the variance for the data set. Show all of your steps. {4, 16, 21, 32, 11, 12}

A:

Q: Draw your data as a scatter plot

A: The objective of this question is to compute the linear correlation coefficient for each data set…

Q: List the sample space that can be obtained from the following; a. the set of integers between 1 and…

A: Givena)The set of intergers between 1 and 50 divisible by 5

Q: 10. In a poker hand consisting of 5 cards, find the probability of holding а. 3 асes b. 4 hearts and…

A: For the given data Find the probabilities

Q: Find the variance of x or the number of cups of coffee.

A: Given Information:

Q: Find the variance(2 decimal).

A:

Q: Five males with an X-linked genetic disorder have one child each. The random variable x is the…

A:

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 set of data: 27, 31, 22, 25, 25. The variance is 0.

A: We have:-   population data set contain 5 numbers given as follows:- 27,31,22,25,25   To find :-…

Q: Frequency 2 1 0 Customer Combo Orders 1 2 Combo 3

A: Calculate mean from the given data