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
ira [324]
3 years ago
14

The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. However,

records indicate that the mean time is 16.2 minutes, and the standard deviation is 3.4 minutes.(a) What is the probabilty that a random sample of n = 40 oil changes results in a sample mean time less than 15 minutes?Round to 4 decimal.(b) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain gol. On a typical Sunday, the oil-change facility will perform 40 oil changes between 10 A.M. and 12 P.M. Treating this as a random sample, what mean oil-change time would there be a 10% chance of being at or below? This will be the goal established by the manager.There is a 10% chance of being at or below a mean oil change time of ? minutes.Round to 1 decimal.
Mathematics
1 answer:
kolezko [41]3 years ago
8 0

Answer:

(a) 0.0128 to 4 decimal places

(b) The 90% confidence interval is 119.1 < μ < 121.0 to 1 decimal places

Step-by-step explanation:

See the attached documents and graphs. Cheers!

Download pdf
<span class="sg-text sg-text--link sg-text--bold sg-text--link-disabled sg-text--blue-dark"> pdf </span>
4de97e6d942fe2c9047a396b82fccba0.png
0b940014a3beda8e854506c0084127b3.png
You might be interested in
N th term of quadratic sequence 3, 11 , 25, 45
choli [55]

The first differences are 8, 14, 20.

The second differences are 6.

Half of 6 is 3, so the first term of the sequence is 3n^2.

If you subtract 3n^2 from the sequence you get 0,-1,-2,-3 which has the nth term of -n + 1.

Therefore your final answer will be 3n^2 - n + 1

6 0
3 years ago
the perimeter of a rectangular painting is 356 centimeters. if the length of the painting is 96 centimeters, what is its width.
sladkih [1.3K]
P = 2(l + w)
p = 356
l = 96

356 = 2(96 + w)
356 = 192 + 2w
356 - 192 = 2w
164 = 2w
164/2 = w
82 = w

check....
p = 2(l + w)
356 = 2(96 + 82)
356 = 2(178)
356 = 356 (correct)

so the width (w) = 82 cm

5 0
3 years ago
Between which pair of numbers is the exact product of 379 and 8.
Bezzdna [24]
<span>Product means multiplication, so I would multiply 379 and 8.
379 x 8 = 3032
3032 is directly in between 3031 and 3033

brainly.com/question/122236
</span>
3 0
3 years ago
You are building a toothpick fort for class. Each wall must be 1 1⁄3 feet long. Each toothpick is 2 inches long. How many toothp
Mariana [72]

Answer: 68/67.8 toothpicks

Step-by-step explanation

first convert how many inches 11.3 feet is

11.3 = 135.6 inches

so after you get your number you get your calculator and divide it by how many inches the toothpicks are

135.6 ÷ 2= 67.8

then to get a solid answer you would round it to a whole number

67.8--> 68

so you ether say the rounded number or you cut .2 inches off the last toothpick

(also im not sure if its 11.3ft or 113ft so if so then take away the decimal and do the same math, you'll end up with 678 toothpicks)

6 0
3 years ago
ABC has vertices A(-4, 4), B(6, 0), and C(-4, 0). Is ABC a right triangle?
a_sh-v [17]

Check the picture below.

7 0
3 years ago
Read 2 more answers
Other questions:
  • The ball bin in the gym contains 8 soccer balls, 12 basketballs, and 10 kickballs. If Coach Meyers selects 2 balls at random and
    8·2 answers
  • Find the slope from the two points (-4,-1) (-3,-3)
    6·1 answer
  • Jeff likes to grow zucchini. He has made a graph of the total number of zucchini his garden has produced this season, which can
    12·1 answer
  • (5+5x)-(1-3x)<br> simplify<br> please and thank you
    10·1 answer
  • Solve for v.<br><br> (v-1)^2 = 2v^2 -5v -17<br><br> If can be more than one solution or no solution
    12·1 answer
  • Rx1=r is what kind of property
    13·1 answer
  • For each of the following pairs of signed integers (2’s complement), subtract the second from the first. Show the decimal equiva
    10·1 answer
  • What is the slope of the line that passes through the points (3, 6) and (1, 2)? Write your answer in simplest form.
    5·1 answer
  • NEED HELP ASAP WILL GIVE BRAINLIEST +20 points
    9·1 answer
  • Today's temperature is supposed to be 5°C warmer than yesterday. If yesterday's temperature was -10°C, what is today's temperatu
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!