A travel agency contacted a department store and obtained the list of all people who made purchases using their credit cards at the store in the last month. The agency then surveyed a random sample from the list, calling them to ask their preference for air travel or train travel for taking holidays. Which of the following types of bias affects the conclusions of the survey?a) Deliberate bias
b) Response bias
c) Non-response bias
d) Selection bias

Answers

Answer 1

Answer:

Answer: Selection bias

Step-by-step explanation:

From the question, we are informed that a travel agency contacted a department store and obtained the list of all people who made purchases using their credit cards at the store in the last month. The agency then surveyed a random sample from the list, calling them to ask their preference for air travel or train travel for taking holidays.

The bus depicted above is referred to as the selection bias. The selection bias is simply a bias that is introduced when the sample obtained is not a representation of the population that the researcher wants to analyze. Here, the study population doesn't represent the target population.

The list gotten was for the people who made purchases using their credit cards but the agency used the list to determine the preference for air travel or train travel for taking holidays. This shows selection bias.

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Please help fast!!! I need help with question attached!!

Answers

Answer:

26 degrees

Step-by-step explanation:

2 angles must equal to 180 of they share the same side/line so,

180-154=26

Cost of a dozen pens is ₹ 180 and cost of 8 ball pens is ₹ 56. Find the ratio of the cost of a pen to the cost of a ball pen. [1 ½ m]

Answers

Answer:

Ratio of cost of a pen to cost of a ball pen is 15:7

Step-by-step explanation:

Given that:

Cost of dozen pens = ₹180

Unit rate = $(180)/(12)$

Unit rate = ₹ 15 per pen

Cost of 8 ball pens = ₹ 56

Unit rate = $(56)/(8)$

Unit rate = ₹7 per ball pen

Ratio of cost of a pen to cost of a ball pen,

15 : 7

Hence,

Ratio of cost of a pen to cost of a ball pen is 15:7

Suppose that two cards are randomly selected from a standard 52-card deck. (a) What is the probability that the first card is a clubclub and the second card is a clubclub if the sampling is done without replacement? (b) What is the probability that the first card is a clubclub and the second card is a clubclub if the sampling is done with replacement?

Answers

Answer:

(a) $(1)/(17)$ (b) $(1)/(16)$

Step-by-step explanation:

GIVEN: Suppose that two cards are randomly selected from a standard $52$ card deck.

TO FIND: (a) What is the probability that the first card is a club and the second card is a club if the sampling is done without replacement? (b) What is the probability that the first card is a club and the second card is a club if the sampling is done with replacement.

SOLUTION:

(a)

Probability that first card is club $P(A)=\frac{\text{total club cards}}{\text{total cards}}$

$=(13)/(52)$

$=(1)/(4)$

As sampling is done without replacement.

probability that second card is club $P(B)=\frac{\text{total club cards}}{\text{total cards}}$

$=(12)/(51)$

$=(4)/(17)$

Probability that first card is club and second card is club $=P(A)* P(B)$

$=(1)/(4)*(4)/(17)=(1)/(17)$

(b)

Probability that first card is club $P(A)=\frac{\text{total club cards}}{\text{total cards}}$

$=(13)/(52)$

$=(1)/(4)$

As sampling is done with replacement.

probability that second card is club $P(B)=\frac{\text{total club cards}}{\text{total cards}}$

$=(13)/(52)$

$=(1)/(4)$

Probability that first card is club and second card is club $=P(A)* P(B)$

$=(1)/(4)*(1)/(4)=(1)/(16)$

Heres a list of numbers 3 6 9 7 4 6 7 0 7 Find median,mean,range and mode

Answers

The median, mean, range and mode will be 6, 5.4, 9 and 7.

The median is the number in the middle when arranged in an ascending order. The numbers will be:

0, 3, 4, 6, 6, 7, 7, 7, 9.

The median is 6.

The range is the difference between the highest and lowest number which is: = 9 - 0 = 9

The mode is the number that appears most which is 7.

The mean will be the average which will be:

= (0 + 3 + 4 + 6 + 6 + 7 + 7 + 7 + 9) / 9.

= 49/9

= 5.4

Read related link on:

brainly.com/question/9426296

Answer:

median=order them and find the middle=6

mean=add them all up and divide by the amount of numbers=(3+6+9+7+4+6+7+0 +7)/9=5.4

range= the difference between the smallest and largest number=9-3=6

mode= the one that appears the most= 7

What is a linear function?

Answers

linear functions are all the mathematical formulas which describe a stright line in the X & Y Axis.

a linear function f(x)=ax +b is a graph where its line changes at a fixed rate (the value of A per X) regardless of the variable X. B is the coeffisient and tells you were the line crosses the second axis.

What is 62 divided by 17 plus 29

I will mark brainliest

Answers

62/17=3.647059+29= 32.64059 but if you round just say 33!

Answer:

32.647

Step-by-step explanation:

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Determine which statements are true in the set of real numbers3. (Select all that apply.) (a) Two lines parallel to a third line are parallel. (b) Two lines perpendicular to a third line are parallel. (c) Two planes parallel to a third plane are parallel. (d) Two planes perpendicular to a third plane are parallel. (e) Two lines parallel to a plane are parallel. (f) Two lines perpendicular to a plane are parallel. (g) Two planes parallel to a line are parallel. (h) Two planes perpendicular to a line are parallel. (i) Two planes either intersect or are parallel. (j) Two lines either intersect or are parallel. (k) A plane and a line either intersect or are parallel. Incorrect: Your answer is incorrect.

Z=15+2(x+y) solve for x

Write an equivalent unit rate to eating chips in 1/4 mins

Choices :A. 40.1 metersB. 12.3 metersC. 19.2 metersD. 47 meters