A computer uses 239 watts per hour. How many watts would it use if it is on for 8 days?

On average, a major earthquake (Richter scale 6.0 or above) occurs three times a decade in a certain California county. Find the

ahrayia [7]

Correct answer should be D

8 0

2 years ago

Upper A baseball organization tests players to see whether they are using performance-enhancing drugs. Officials select a team

aleksklad [387]

Answer:

Cluster sampling

No

Step-by-step explanation:

Missing part of Question

Find:

a) Which type of sample is this?

b) Is it the correct choice ?

Solution:

- Simple random sample is the one in which every individual would have equal chance of being selected.

- Stratified random sample draws simple random sample from the independent sub-groups.

- Systematic sampling is letting every kth individual be in the sample ( k as an integer )

- Convenience sampling is used for example voluntary response or a sub-group from the population.

a)

Cluster sampling was used in our case because one of all the teams were chosen and this entire team is in this sample.

b)

No. This method has limitation of giving us a shortsighted view which lacks the overview on the use of performance-enhancing drugs, we can only use this sample to draw conclusions on the team.

7 0

2 years ago

the Panthers team won exactly 2 of its 9 games. by winning all its remaining N games, the panthers ended with victories half of

emmasim [6.3K]

2+number won over 9+number played=1/2
number won=number played (number played means how many more past 9)

so
if n=number won=number played then $\frac{2+n}{9+n}= \frac{1}{2}$
times both sides by (2)(9+n)
2(2+n)=9+n
distribute
4+2n=9+n
minus n from both sides
4+n=9
minus 4 from both sides
n=5

answer is 5
test
2+5=7
9+5=14
7/14=1/2
true

n=5

5 0

2 years ago

kate would like to find the height of her favorite rollercoaster at the amusement park. She noticed that she casts a 2 foot shad

alex41 [277]

Set up a proportion with Katie’s height / Katie’s shadow = roller coasters height / its shadow. So it is 5 feet / 2 feet = x feet / 60 feet. To solve cross multiply so it becomes 2x = 300 and x = 150 feet

5 0

2 years ago

A study was done to determine if students learn better in an online basic statistics class versus a traditional face-to-face (f2

mylen [45]

Answer:

1) 25

2) 3.507

3) 4.35

Step-by-step explanation:

Note: from the question, the number of F2F data is 15 not 12

1) for degree of freedom:

12 + 15 - 2 = 25