Answer:
The answer is D.
Step-by-step explanation:
ItisgiventhatGabriellaswims2lapsfor1minute.Soinordertofindhowmanyminutesdidheswimforeachlap,youhavetodivideitby2:
2 laps = 1 minute
2 laps ÷ 2 = 1 minute ÷ 2
1 lap = 1/2 minute
= 30 seconds
Test:
Gabriella swim 1/2 min per lap. So if he swim 2 laps, you have to multiply it by 2 :
1/2 × 2 = 1 minute
Answer:
The answer is D
Step-by-step explanation:
HOPE THIS HELPS
B. Stratified Sampling.
C. Cluster Sampling.
D. Systematic Sampling.
E. Convenience Sampling.
Answer:
a. There are five categories of employees (administration faculty, professional staff, clerical and maintenance). Randomly select ten individuals from each category.
Completed question;
The administration of a large university is interested in learning about the types of wellness programs that would interest its employees. To do this, they plan to survey a random sample of employees. Under consideration are several plans for selecting the sample. Which of the following sampling strategies is the stratified sampling?
a. There are five categories of employees (administration faculty, professional staff, clerical and maintenance). Randomly select ten individuals from each category.
b. Fach employee has an ID number. Randomly select 50 numbers.
c. Randomly select a school within the university (eg, Business School) and survey all of the individuals (administration, faculty, professional staff, clerical and maintenance) who work in that school.
d. The HR Department has an alphabetized list of newly hired employees (hired within the last five years). After starting the process by randomly selecting an employee from the list, then every 5th name is chosen to be included in the sample.
Step-by-step explanation:
Stratified sampling is a sampling strategy from a population that involves sampling by dividing or partitioning the population into smaller subgroups.
So the correct answer is "There are five categories of employees (administration faculty, professional staff, clerical and maintenance). Randomly select ten individuals from each category." because it involves dividing the population into subgroups.
Answer:
0.6 or 3/5
Step-by-step explanation:
If cos(t) = 4/5, then, taking the arccos of both sides, t ≈ 36.86989765. Taking the sin of that gives you 0.6, or 3/5 in fraction form.
Step-by-step explanation:
Jose bought 750 bags for $375.00
Each bag cost $375/750= $0.50
He intends to sells them for $0.15 more
He should charge : $0.5 +$0.15=$0.65
Answer:
Step-by-step explanation:
Okay, so, 2 necklaces would be $20.
One hour would be + $2.75
Three hours would be + $8.25
So all the hours together would be $11
Then, you add $20 + $11 to get $31.
Answer:
b. A binomial variable with 25 independent trials
Step-by-step explanation:
The conducted experiment is binomial experiment because outcome can be divided into success or failure. The success would be the people who read novel in the past year and also responses are independent of each other. We have to find the number of trials n in the given problem.
we are given that variance of R=6 and p=probability of success=0.4.
We know that variance of binomial distribution is
Variance=npq
where q=1-p=1-0.4=0.6.
By putting the values in variance formula, we can get the value of n.
6=n*0.4*0.6
6=0.24*n
n=6/0.24
n=25
Hence, random variable R is a binomial variable with 25 independent trials.
The mean of all the data will be equal to 8.
Mean is defined as the ratio of the sum of the number of data sets to the total number of data. Mean is generally the average it is calculated by adding all the data and dividing by the number of the data.
Given that a basketball team played six games. In those games, the team won by 8 points, lost by 14, won by 9, won by 10, lost by 1, and won by 6.
The mean of the data will be calculated as:-
Mean = ( 8 + 14 + 9 + 10 + 1 + 6 ) / 6
Mean = 8
Therefore, the mean of all the data will be equal to 8.
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