1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erica [24]
3 years ago
6

The manager of a shopping mall distributed a customer-satisfaction survey by handing it to people as they came through one of th

e doors to the mall one day. Of those handed out, 215 were completed and returned. Should the results of the survey be generalized to the population of all customers of the shopping mall?
D No, because a random sample from all customers of the shopping mall was not selected.

E No, because not all customers were selected.
Mathematics
2 answers:
Tresset [83]3 years ago
6 0

Answer:

The correct option is D.  No, because a random sample from all customers of the shopping mall was not selected

Step-by-step explanation:

In statistics, Bias can be described as a term which depicts error if a sample is not taken evenly or it depicts errors taken from an unjust sampling.

In statistics, sampling bias means the errors which occur if one part of the population is favoured more then the rest of the populations. In this kind of bias, the individuals for experimentation are not chosen randomly.

As the customer satisfaction survey was distributed in only one of the gates hence, it does not give a generalized result and the result is biased.

vlabodo [156]3 years ago
6 0

Answer:

Option D.

Step-by-step explanation:

Sampling bias is a bias in which a sample is collected in such a way that some members of the population have a less probability of being a part of the sample than others. In this case, individuals are not chosen randomly but selectively. Consequently, the result is biased.

In the given question, although the manager of a shopping mall distributed a customer-satisfaction survey by handing it to people as they came through one of the doors to the mall one day but of those handed out, only 215 were completed and returned.

So, the results of the survey can not be generalized to the population of all customers of the shopping mall as a random sample from all customers of the shopping mall was not selected.

You might be interested in
Find sin θ if θ is in Quadrant III and tan θ = . 0.958
Leokris [45]
Use the following identities:
sec^2 = 1  + tan^2 \\  \\ sec = \frac{1}{cos} \\  \\ sin^2 = 1 - cos^2
Also because the angle is in quadrant 3, sin must be negative.
Therefore
sin = - \sqrt{1 - \frac{1}{1 + tan^2}}
Subbing in tan = 0.958
sin \theta = -0.69178
7 0
2 years ago
Find an acute angle whose sine is 0.52
Shalnov [3]
<span> Answer: 90° degrees </span>
5 0
3 years ago
The two legs of right triangle measures 6 and 8 inches respectively. What is the area of the circle that contains all 3 vertical
andrezito [222]

Answer:

See image.

Step-by-step explanation:

Remember if you have a right angle inside of a circle, the hypotenuse is going to land exactly on the diameter. Also, Area of a circle = (pi)r^2 Lastly, remember pythagorean triples such as 3,4,5 or at least, the Pythagorean theorem a^2 + b^2 = c^2

3 0
2 years ago
Find the perimeter and area of this rectangle
yulyashka [42]
P = 11 + 4 + 18 + 37 + 7 + 19 = 96

a = (18*7) + (11*19) = 126 + 209 = 335
3 0
3 years ago
The city of Omaha decided to build a new parking garage in hopes of luring more people to the Old Market district.The city will
dimulka [17.4K]

Answer:

Given:

Mean, u = 135

Sample size, n = 42

Sample mean, x' = 126

Standard deviation = 16

Significance level = 0.05

1) The null and alternative hypotheses:

H0 : u = 135 (the revenue per day is $135)

H1 : u < 135 (the revenue per day is less than $135)

2) In this case, we have a left tailed test.

Let's use the formula:

= \frac{x' - u}{s/ \sqrt{n}} = \frac{126 - 135}{16 / \sqrt{42}} = -3.645

t = - 3.645

Critical value: at a significance level of 0.05, left tailed test,

tcritical = -1.683

We reject null hypothesis, H0, since t calculated, -3.645 is less than tcritical, -1.683.

3) Given, a = 0.05, df = 41, left tailed test,

t-value = 2.02

For the corresponding confidence interval, we have:

CI = (x' - \frac{t * \sigma}{\sqrt{n}}, x' + \frac{t * \sigma}{\sqrt{n}})

CI = (126 - \frac{2.02 * 16}{\sqrt{42}}, 126 + \frac{2.02 * 16}{\sqrt{42}})

CI = (121.014, 130.986)

4) Conclusion:

We reject the estimated potential revenue advised by the consultant, H0, as it is too high, because the t-calculated falls in rejection region(i.e, less than critical value), also the upper limit of the confidence interval is less than $135.

5 0
2 years ago
Other questions:
  • A rock dropped on the moon will increase its speed from 0 m/s (its starting
    8·1 answer
  • What are the major arcs of o0 that contain point B?
    14·1 answer
  • Allowance bank received a deposit of 28,000 and is free to lend out 25,480 what is the reserve rate?
    7·1 answer
  • Define scalene and isosceles
    9·2 answers
  • 6/5 sums in simplest form​
    15·2 answers
  • The graph shows a dilation with respect to the origin of rhombus RHOM. what is the factor of dilation?
    7·2 answers
  • Write the equation of the line of best fit using the slope-intercept formula y=mx+b. Show all your work, including the points us
    8·1 answer
  • Here are some points for all who are working hard and over coming challenges and helping &lt;3 ( p.s there is another one in adv
    5·1 answer
  • Gretta is having a birthday party and is buying pizza for everyone. She buys 32 pizza for 8. 00 dollars. What is the unit rate?
    5·1 answer
  • Write equivalent fractions for 1/4,1/2,and 7/9 using the least common denominator.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!