duke4527
24.06.2021 •
Mathematics
Of the cost price of 10 chair is equal to the price of 16 chairs, find the loss or gain percenatge.
Solved
Show answers
More tips
- O Other What happens if you get scared half to death twice?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- S Style and Beauty How are artificial nails removed?...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- F Family and Home How to Properly Use a Water Level?...
- L Legal consultation What Documents Are Required for a Russian Passport?...
- H Health and Medicine How to Treat Styes: Causes, Symptoms, and Home Remedies...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
Answers on questions: Mathematics
- M Mathematics Researchers surveyed 250 college students at one time. They were asked if they were taking any engineering classes and whether or not they felt depressed. If 75 students reported...
- M Mathematics Suppose an interval estimate for the population mean was 62.84 to 69.46. the population standard deviation was assumed to be 6.50, and a sample of 100 observations was used. the...
- M Mathematics Solve the homogeneous linear system corresponding to the given coefficient matrix. (if there is no solution, enter no solution. if the system has an infinite number of solutions,...
- M Mathematics Which statement is true about the circumference of a circle? 15 O The circumference is the measurement around the circle. O The circumference is the measurement of the radius. O...
- M Mathematics Someone help me out :/...
- M Mathematics Encuentra el ángulo central de una circunferencia de 6 cm de radio, que subtiende un arco de 4,5 cm....
- M Mathematics Please answer this correctly...
- M Mathematics Each page of a top-secret report on aliens requires 2 \text{ KB}2 KB2, start text, space, K, B, end text of space in digital format. What is the maximum number of pages the report...
- M Mathematics Need help!! A certain radioactive substance decays exponentially over time. The amount of asample of the substance that remains, P, after t years is given by P(t) = 10e^-47,where...
- M Mathematics Sonya has $14 in her wallet. She owns her brother $7.00 what integer represents the amount of money in her wallet after she pays her brother...
Ответ:
10
Step-by-step explanation:
Wwrgyuioohgsfvbnbhhgfdf
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.