![bri9263](/avatars/12337.jpg)
bri9263
01.10.2019 •
Mathematics
Algebra 1 b unit 7 lesson 2 semester b someone
Solved
Show answers
More tips
- C Computers and Internet Can You Insert a Regular SIM Card into an iPad? Let s Find Out...
- F Food and Cooking Лечо: вкусное и простое блюдо для любой кухни...
- H Health and Medicine Relieving Swelling in Legs: Causes and Ways to Alleviate the Symptom...
- S Style and Beauty How to Get Rid of a Bruise: Tips and Tricks...
Answers on questions: Mathematics
- M Mathematics A basketball coach uses the expression 2b + 1 to determine the number of points earned by his players during a practice drill, where b is the number of baskets made outside the...
- M Mathematics Write the fractions 1/2, 7/8, and 3/4 from least to greatest...
- M Mathematics 1/2(x+1)=2 which does a possible four-step process to find the solution of this equation...
- B Business Fuller Company allocates manufacturing overhead based on machine hours. Each bike produced should require 4 machine hours. According to the static budget, the following is expected...
- H History Suppose you were a separatist on the mayflower. write a short letter to someone still in england, describing your feelings about the mayflower compact....
- B Biology What type of boundary is the East Pacific Ridge?...
- E English In “everyday use” by alice walker, what does the narrator’s internal voice indicate about the relationship between dee and the narrator?...
Ответ:
There is enough evidence to support the claim that the proportion of women working the graveyard shift is less than the proportion of men working the graveyard shift (z=-2.44).
Critical value (α=0.01) zc=-2.33.
Step-by-step explanation:
This is a hypothesis test for the difference between proportions.
The claim is that the proportion of women (subindex 1) working the graveyard shift is less than the proportion of men (subindex 2) working the graveyard shift.
Then, the null and alternative hypothesis are:
The significance level is 0.05.
The sample 1, of size n1=343 has a proportion of p1=0.0437.
The sample 2, of size n2=294 has a proportion of p2=0.0918.
The difference between proportions is (p1-p2)=-0.0481.
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:
For a significance level of 0.01 and a left-tailed test, the critical value of z is zc=-2.326.
If the test statistic is smaller than the critical value, the null hypothesis is rejected.
The test statistic z=-2.44 is smaller than the critical value zc=-2.326, so the null hypothesis is rejected.
There is enough evidence to support the claim that the proportion of women working the graveyard shift is less than the proportion of men working the graveyard shift.