![youngcie04](/avatars/3500.jpg)
youngcie04
23.08.2021 •
Social Studies
ASAP time almost out
Based on the scores in the chart above, which restaurant is the BEST choice for dinner tonight and why?
A. Ku’s Chinese buffet, because it has a total score of 2+
B. Ku’s Chinese buffet, because it has a total score of 12+
C. Umberto’s Italian restaurant, because it has a total score of 3+
D. Umberto’s Italian restaurant, because it has a total score of 9+
Solved
Show answers
More tips
- S Style and Beauty Why is Sugaring Better than Waxing for Hair Removal?...
- W Work and Career Where can you learn to be a flight attendant?...
- G Goods and services How to Properly Calculate the Power of Your Air Conditioner?...
- F Food and Cooking Effective Methods to Organize Videos in your iPad According to Content...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
Answers on questions: Social Studies
- S Social Studies What is external force is the force that chage act upon the earth surface form out side...
- S Social Studies 1. Which best defines the Enlightenment? Check all that apply. a religious movement that appealed to the emotions of the colonists an intellectual movement that appealed...
- S Social Studies Explain why charts and graphs are useful....
- S Social Studies What is the main reason why education became more important to the brazilian government?...
- S Social Studies As warm air it has less pressure. a) rises b) high c) low...
- S Social Studies . What kind of science is economics? What is a “law” in science?...
- S Social Studies How can I get a glow up faster?...
- M Mathematics What is the relationship between numbers...
- H History How did west african kingdoms grow wealthy through trade?...
- B Biology Which property below is shared by both carbohydrates and lipids? both have the same proportion of carbon-hydrogen bonds. both are dissolvable in water. both have the...
Ответ:
a. If the P-value is smaller than the significance level, the null hypothesis is rejected.
b. Pooled proportion = 0.8
c. z = 2.7
d. As the P-value (0.0072) is smaller than the significance level (0.05), the null hypothesis is rejected.
There is enough evidence to support the claim that the proportions differ significantly.
Step-by-step explanation:
This is a hypothesis test for the difference between proportions.
We will use the P-value approach, so the decision rule is that if the P-value is lower than the significance level, the null hypothesis is rejected.
The claim is that the proportions differ significantly.
Then, the null and alternative hypothesis are:
The significance level is 0.05.
The sample 1, of size n1=200 has a proportion of p1=0.85.
The sample 2, of size n2=150 has a proportion of p2=0.7333.
The difference between proportions is (p1-p2)=0.1167.
The pooled proportion, needed to calculate the standard error, is:
The estimated standard error of the difference between means is computed using the formula:
Then, we can calculate the z-statistic as:
This test is a two-tailed test, so the P-value for this test is calculated as (using a z-table):
As the P-value (0.0072) is smaller than the significance level (0.05), the effect is significant.
The null hypothesis is rejected.
There is enough evidence to support the claim that the proportions differ significantly.