1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Korolek [52]
3 years ago
7

Four research teams each used a different method to collect data on how fast a new strain of maize sprouts. Assume that they all

agree on the sample size and the sample mean (in hours). Use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation.
A.Confidence Level: 99.7%; Confidence Interval: 42 to 48 
B.Confidence Level: 95%; Confidence Interval: 43 to 47
 C.Confidence Level: 68%; Confidence Interval: 44 to 46 
D.Confidence Level: 95%; Confidence Interval: 44 to 46
Mathematics
2 answers:
Westkost [7]3 years ago
5 0
<span>Confidence Level: 95%; Confidence Interval: 44 to 46</span>
Drupady [299]3 years ago
5 0

Answer:

D

Step-by-step explanation:

First of all we know that confidence interval includes

Mean + or - z critical value (std deviation)

The larger the confidence level the longer the confidence interval would be.

Here given the confidence level for four research teams each used a different method to collect data on how fast a new strain of maize sprouts

.Confidence Level: 99.7%; Confidence Interval: 42 to 48  

B.Confidence Level: 95%; Confidence Interval: 43 to 47

C.Confidence Level: 68%; Confidence Interval: 44 to 46  

D.Confidence Level: 95%; Confidence Interval: 44 to 46

Comparing B and D we find that D is having less std deviation as length is narrower.

Comparing D with C, we conclude that for same 44 to 46 C used only 68%

So C must have had higher std dev than D

Similarly A and D comparison shows that A has more longer interval and more std deviation.

So answer is D which has the smallest std dev

You might be interested in
What statement makes the open sentence 2.4 = 6x true?
Softa [21]
C. 0.4 times 6 is 2.4. Hope that helps.
5 0
3 years ago
Read 2 more answers
Which functions are nonlinear? Select TWO that apply.
Annette [7]

Answer:

A,B

Step-by-step explanation:

I think bc I had the same question well something like this in A in B was it

8 0
2 years ago
Vector v has a direction of (5,3) find the direction angle for v to the nearest degree
Vesnalui [34]

Answer:

31^{\circ}

Step-by-step explanation:

We have been given that vector v has a direction of (5,3). We are asked to find direction angle for v to nearest degree.

We know that direction of vector with components (a,b) can be determined by \theta=\text{tan}^{-1}(\frac{b}{a}).

Upon substituting the components of given vector in above formula, we will get:

\theta=\text{tan}^{-1}(\frac{3}{5})

\theta=30.9637565^{\circ}

Upon rounding to nearest degree, we will get:

\theta\approx 31^{\circ}

Therefore, the direction angle for vector v is 31 degrees.

3 0
3 years ago
A giraffe is standing 22 feet from a naturalist hiding in the bush. The naturalist sights the animal and finds the angle of elev
kaheart [24]

Tan(angle) = opposite leg/ adjacent leg

Tan(30) = x/22

X = 22 * tan(30 )

X = 12.701 feet.

Round as needed

3 0
3 years ago
Jasmine wants to start saving to purchase an apartment. Her goal is to save $225,000. If she deposits $180,000 into an account t
Y_Kistochka [10]

The time it will take the principal to grow to the desired amount is 0.7 years

Using the compound interest formula :

A = P(1 + r/n)^(nt)

A = final amount = 225,000

P = principal = 180,000

r = rate = 3.12%

n = Number of compounding times per period = 12(monthly)

t = time

225000 = 180000(1 + (0.0312 /12))^(12t)

Divide both sides by 180000

225000/180000 = (1 + (0.0312 /12))^(12t)

1.25 = 1.026^12t

Take the log of both sides

0.0969100 = 0.0111473 × 12t

0.0969100 = 0.1337676t

Divide both sides by 0.1337676 to isolate t

0.0969100 / 0.1337676 = t

0.7244 years

0.7 years

It will take 0.7 years for the amount to grow

Learn more : brainly.com/question/21270833?referrer=searchResults

8 0
2 years ago
Read 2 more answers
Other questions:
  • Performance task: A parade route must start And and at the intersections shown on the map. The city requires that the total dist
    13·1 answer
  • 3 ( q + 4/3 ) = 2 <br> what is q
    13·2 answers
  • A total of 320 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student t
    5·2 answers
  • How do you convert feet to inches
    9·1 answer
  • Numbers 11-14 pls I’m having a lot of trouble
    6·1 answer
  • Please Help will give Brainliest!!
    15·1 answer
  • How do I explain how to find one quantity as a percentage of another
    8·1 answer
  • Deborah is saving for a trip. She wants to have at least ​$74 for each of the 13 days of her trip. If saves ​$84 each month for
    14·1 answer
  • Tim received $59 for his birthday. He went to a sporting goods store and
    15·2 answers
  • You estimated a length to be 10 ft, but when you actually measured, you found it to be 8.75 ft. What was your percent error for
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!