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maks197457 [2]
2 years ago
11

A study is conducted to investigate whether customer satisfaction is greater among computer companies that offer tech support ve

rsus those that do not offer tech support. A random sample of 50 customers are selected from among those that purchased computers that offer tech support. A separate random sample of 40 customers are selected from among those that purchased computers that do not offer tech support.
The study found that the mean satisfaction rating was significantly greater among customers that purchased computers that offer tech support.
Which of the following is the best description of this study?
(A) An experiment using a completely randomized design.
(B) An experiment using a randomized block design.
(C) An experiment using a matched pairs design
(D) An observational study using a simple random sample.
Mathematics
1 answer:
TiliK225 [7]2 years ago
7 0

Answer:

The correct answer is (E).

This is not an experiment because no treatment is being imposed upon the customers. Additionally, this study used a stratified sample because independent random samples were selected from two distinct populations of customers.

Step-by-step explanation:

You might be interested in
Investigating Hollywood Movies
erik [133]

Answer:

a. Genre with highest mean is drama. Mean is 72.10

B. 10.46 is difference between means of comedy and horror

C. Horror has the lowest minimum value at 25.00

Action and comedy both have the highest maximum value at 93.00

Step-by-step explanation:

First create a table with the data provided like I did in the attachment. It would give a clearer picture of what your answers should be.

1. Which genre has the highest mean score?

From the table, we have the means as:

Action = 58.63

Comedy = 59.11

Drama = 72.10

Horror = 48.65

The genre with the highest score is drama at 72.10

2. Difference in mean score between comedy and horror

Mean of comedy = lc = 59.11

Mean of horror = ly = 48.65

Difference = lc-ly

= 59.11 - 48.65

= 10.46

3. The genre with lowest score is the genre with the lowest minimum value. This genre is horror and the lowest minimum is 25.00

The genre with highest minimum value is that whose maximum value is the highest out of all the genres. Both action and comedy have the highest maximum value at 93.00

7 0
2 years ago
At 9 o’clock in the morning, the temperature was 29 Fahrenheit it dropped 5 Fahrenheit each hour what was the temperature at 4 o
suter [353]

Answer:

-6 degrees fahrenheit

Step-by-step explanation:

7×5=35

29-35=-6

4 0
3 years ago
HaLp MeH plEaSe!!!!!!!!!!!!!!!!!!!
Dennis_Churaev [7]

oof

Step-by-step explanation:

8 0
2 years ago
Which is an equation of the line with x-intercept 2 and y-intercept 12?
Liula [17]
Your answer should be y=2x+12
5 0
3 years ago
A number decreases from 25 to 8, what is the percent of decrease?
noname [10]

Answer:

68%

Step-by-step explanation:

25-8=17

17/25=0.68

68%

Hope this helped :)

4 0
3 years ago
Read 2 more answers
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