Just Checking2. A consumer watchdog organization received customer complaints about
the performance of one brand of batteries. To investigate, the researchers
purchased 24 of these batteries and ran them until they died. This sample
lasted a mean of 47 hours with a standard deviation of 3 hours.
a) What assumption must we make about battery life in order to use a t
model?
b) Find a 95% confidence interval for the mean lifespan of this brand of
batteries.
c) Write a conclusion based on your confidence interval.

Answers

Answer 1

Answer: The answer is b because 95 confidence is interval for the mean lifespan

Related Questions

Evaluate. 1 – 3 • 7 4 • 2 A. –28 B. –12 C. –32 D. –20
Please help with mathematics. Best gets brainliest. The question is in the inserted photo.
How do you show the work for 1162 divided by 4
Sin 2x=check all that applyA. 2sin x cos xB. 1-2 sin^2 xC. 2cos x sin xD. 2sin x +2cos x
(a+b)(d+e) How many terms and factors in this expression? Please tell me specifically how many factors are there and how many terms are there. Please help!

How many inches is 78% of 3 feet?

Please show me how to do it!

Answers

Answer:

28.08 inches

Step-by-step explanation:

Recall 1 foot = 12 inches

3 feet = 12 x 3 inches = 36 inches

78% of 3 feet

= 78/100 x 3 feet

= 78/100 x 36 inches

= 28.08 inches

You and a friend baked 400 cupcakes together. if your friend baked 60% of the cupcakes, how many cupcakes did you bake?

Answers

160 cupcakes

If your friend baked 60% of 400 total, that means that the remaining amount of cupcakes that you baked is 100% – 60% = 40%. So, we must find 40% of 400

To do this, first we must convert 40% into decimal form. We can do this by dividing it by 100: 40 ÷ 100 = 0.4

Then, "of" usually means multiplication. In this case, it does, so to find 40% of 400, we must calculate 0.4 • 400

0.4 • 400 = 160, so you baked 160 cupcakes

Your friend baked 60% so (60/100) x 400 = 240

400 - 240 = 160

What is the sum of -7/18 and -3/6
a.) -4/9
b.) - 8/9
c.) 4/9
d.) 8/9

Answers

Answer:

-b) -8/9

Step-by-step explanation:

Answer:

The correct Answer is B.) -8/9

Step-by-step explanation:

HAVE AN AMAZING DAY!!

What is the value of x?

Enter your answer in the box.
x =

Answers

X= 20 and that would be x

x = 20

Step-by-step explanation:

In this problem, we have a set of vertical angles. We know that vertical angles are congruent, so we just have to set the two expressions equal to each other.

$3x+50=6x-10$

Subtract 3x from both sides.

$3x-10=50$

Add 10 to both sides.

$3x=60$

Divide 60 by 3.

x = 20

Jemina flips a disc with one side black and the other side white. What is the probability that the 16th flip will result in the disc landing white side up? 1/2
1/15
1/16
15/16

Answers

1/16, hope this answers your question! :D

How do you solve 7 (5a-4)-1=14-8a

Answers

the answer is 1 why because

7(5a - 4) -1 = 14 - 8a
35a - 28 -1 = 14 - 8a
+8a +8a
43a - 28 -1 = 14
43a - 29 = 14
+ 29 +29
43a = 43
___ ___
43 43

a= 1

Other Questions

In a chess match, a win counts as 1 point, a draw counts as 0.5 point, and a loss counts as 0 points. After 21 games between the two players, the winner was 8 points ahead of the loser. How many points did the winner have?PLS HELP

Draw lines to show much each person gets. write the answer. 4 friends share 3 Orange equally

The quotient of a number and ten increased by five

The area of a rectangle is 123 cm2. If the width is 3 cm, find the length. Let l represent the length of the rectangle.