1. A bank is conducting a customer satisfaction survey, sampling from a list of 25000 active customers. The list includes 15000 general account holders, 5000 community-care account holders, 2500 premium account holders and 2500 enterprise account holders. The analyst would like to obtain a sample of 500 customers by random sampling. (a) The selection will be made so that there is as close a representation as possible without bias towards any group of customers (i) What sampling method should be used? (ii) How many community-care account holders should be selected? (b) If systematic sampling is used to select the samples in the general customer account holders (i) What is the sampling interval? (ii) If the first sample taken is 00028, suggest the third and fourth codes for the next two samples 2. The spending of 20 customers on movies and snacks are as follows: 110 122 132 163 120 114 168 129 148 141 135 155 131 152 147 148 136 167 153 157 (a) Draw the stem-and-leaf diagram for these data e (b) Find the median, the lower and the upper quartiles of the data (c) Find the sample variance and the sample standard deviation of the data. (d) Comment briefly on the skewness of the data.

Q: ). A Haw hweh 1 R ?

A: Note:- The center of a circle touching two intersecting lines lies on the angle bisector of the…

Q: QUESTION 9 4 6. O34 56 36

A: We have to find value of angel

Q: 1. Suppose we have a six-sided die that we roll once. Let ai represent the event that the result is…

A:

Q: so what precentage would be correct for this question   a.16% b.18% c.22% d.20%

A: The mean is 114.8 and standard deviation is 13.1.

Q: Officer Milton visits local area businesses as part of a theft preventioh program. If Officer Milton…

A: No of week in a year =52

Q: The average annual salary for 55 statisticians out of 205 statisticians at a search information…

A: Given : The average annual salary for 55 statisticians out of 205 statisticians at a search…

Q: Find the value of x and y so that 3 6. 12 16 Both x and y are equal to..

A: We use the properties of matrices to find the values of x and y.

Q: The correct answer for Ho and Ha is Ho: mean greater than or = to 32 Ha; mean is less than 32…

A: here use given Information to perform Hypothesis Testing

Q: I. Directions: Identify the postulate or property defined in each of the following statements.…

A: We have to match the following correctly.

Q: Find the point Q, given P(1,3,-4) and PO = %3D 7

A: Given: P = (1,3,-4) PQ = (-1,4,7)

Q: Do you realize how crucial Ada Lovelace was to mathematics?

A: Ada Lovelace (1815–1852) was certainly one of the most significant women in the history of science,…

Q: Seven of the fifteen stars that Howard is watching through his telescope are dwarf stars.  Express…

A: Given:- Seven of the fifteen stars that = 7/15 Express as a decimal

Q: FlossHs Greens 15 25 40 Arangement 60 Total 105 95 200 What is the probability that a randomly…

A: Let, From given table : P(G) = 40200PF∩G=25200We want to find;P(F|G) = ?

Q: What percentage of the scores are in the shaded area?

A: A) To find the percentage of the scores that are in the shaded region.

Q: 1. The times required by three workers to perform an assembly-line task were recorded on five…

A: Answer                         Group1           Group2            Group3…

Q: answer in detail  D E) F)

A: d. According to the provided data, there are 8 categories of ages, that is, the value of k. The…

Q: In a school of 450 students, 120 students are in DECA, 270 students are on sports teams, and 75…

A:

Q: Answer the following if it is Valid or not: All smiling cats talk. The Cheshire Cat smiles.…

A: We need to determine if the given argument is valid or not.  We have the argument: All smiling cats…

Q: Fred is testing a large prize wheel which has the numbers one, two, three, and four repeated along…

A: Part (a): Does the wheel behave differently after being oiled?Step 1: Define the HypothesesNull…

Permutations and Combinations

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.

Counting Theory

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.