1 answer:
Question is Incomplete, Complete question is given below.
Mr. Jablonski's class is making fudge for a bake sale. Mr. Jablonski
has a recipe that makes 3/4 pound of fudge. There are 21 students in
the class. Each student uses the recipe to make one batch of fudge.
How many pounds of fudge do the students make?
Answer:
student made of fudge.
Step-by-step explanation:
Given:
Mr. Jablonski recipe makes 3/4 pound of fudge.
Number of student in class = 21 students.
Each student uses the recipe to make one batch of fudge.
Hence to calculate Total amount of fudge student made we will multiply the amount of fudge used in recipe with Number of students.
Total amount of fudge student made = amount of fudge used in recipe × Number of students.
Total amount of fudge student made =
Hence the student made of fudge.
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Answer:
a i.) The mean for the security company is $ 1.47 million
a ii.) The median for the security company is $ 1.55 million
a iii.) The mean for the other companies is $ 1.96 million.
a iv.) The mean for the other companies is $ 2.0 million.
b) B. The mean and the median for the security company are both lower than the mean and the median for the collections performed by other companies.
c) B. Since the security company appears to have collected lower revenue than the other companies, there is some evidence of stealing by the security company's employees.
Step-by-step explanation:
By mean, we sum all the observation and divide by the sample size (n). Where sample size is the number of observations.
Mathematically,
, where xi is the observations or values given.
By median, we mean middle number. So, we sort the values in ascending or descending order and take the value(s) in the middle. If the sample size is even, we take the 2 middle values and obtain the average.
See below, R programming codes for the solution.
##########...... R code
s = c(1.6,1.8,1.6,1.8,1.7,1.2,1.1,1.2,1.2,1.5)
c = c(1.5,2.1,1.9,2.2,1.9,1.7,2.1,2.2,2.2,1.8)
length(s)
mean(s); median(s)
mean(c);median(c)
t = (mean(s)-mean(c))/sqrt((var(s) + var(c))/length(s))
pnorm(t)
##############################################
For question C, we compute the test statistics, and obtain the p-value, see the last two lines of the R codes.
And since the p-value is less than level of significance, the test is significant. Thus, we conclude that:
<em>Since the security company appears to have collected lower revenue than the other companies, there is some evidence of stealing by the security company's employees.</em>