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
k0ka [10]
3 years ago
15

A company tests all new brands of golf balls to ensure that they meet certain specifications. One test conducted is intended to

measure the average distance traveled when the ball is hit by a machine. Suppose the company wishes to estimate the mean distance for a new brand to within 1.9 yards with 90​% confidence. Assume that past tests have indicated that the standard deviation of the distances the machine hits golf balls is approximately 14 yards. How many golf balls should be hit by the machine to achieve the desired accuracy in estimating the​ mean?
Mathematics
1 answer:
docker41 [41]3 years ago
3 0

Answer:

385 golf balls

Step-by-step explanation:

margin of error = (z*)(s) / sqrt n

where z* = 1.96 with 5%/ 2 = 0.025 area in each tail

margin of error = (z*)(s) / sqrt n

1.2 yards = (1.96)(12 yards) / sqrt n

solve for n

n = 384.16

385 golf balls (always round up)

You might be interested in
Given: B bisects EA, FE is parallel to CA, DC is parallel
SIZIF [17.4K]

Answer:

Choice 3: AAS

Step-by-step explanation:

We can prove that by AAS that means we need two congruent angles and one congruent side.

The first angle will be the vertical pair <FBG and <DBC.

The second angle will be the alternate interior pair <G and <D.

The one side will be \overline{GB} and \overline{BD}.

3 0
2 years ago
Czy 100 jest wielokrotnością liczby 8
In-s [12.5K]

Answer:

I don't understand.

Step-by-step explanation:

8 0
2 years ago
Help!! I'll give points if anybody can answer these for me!
galina1969 [7]

Transformation involves changing the position of a shape.

The transformation from \triangle ABC to \triangle A'B'C' is 90 degrees clockwise rotation

Using the coordinates of A and A', we have:

A= (-6,3)

A'= (3,6)

Notice that the x-coordinate is <em>negated </em>and then <em>swapped </em>with the y-coordinate.

i.e.

(x,y) \to (y,-x)

The transformation of a point from <em>(x,y) to (y,-x)</em> is a 90 degrees clockwise rotation.

Hence, the transformation from \triangle ABC to \triangle A'B'C' is 90 degrees clockwise rotation

Read more about transformations at:

brainly.com/question/13801312

6 0
2 years ago
The hourly wage increase each employee receives each year depends on their number of years of service. Every three years of serv
Fudgin [204]
If we let x as the number of years of service in the company and f(x) as the increase in the wage, the step wise function that describes the scenario is
f(x) = { 0.5,   x < 3
         { 1.0,   3 ≤ x < 6
         { 1.5,   6 ≤ x < 9
         { 2.0,   9 ≤ x < 12

The point (2, 12) represents the wage increase of x < 12
5 0
3 years ago
Read 2 more answers
Condense the expression to the logarithm of a single quantity.
kherson [118]

\dfrac 12 \log_3 x - 2\log_3 (y +8)\\ \\=\log_3 x^{\tfrac 12}- \log_3(y+8)^2~~~~~~~~~~~~~~~~~~;[\log_b m^n = n \log_b m]\\\\=\log_3 \left( \dfrac {x^{\tfrac 12}}{y+8)^2} \right)~~~~~~~~~~~~~~~~~~~~~~~~;\left[\log_b \left( \dfrac mn \right) = \log_b m - \log_b n \right]

3 0
2 years ago
Other questions:
  • BRIANLIEST Helpppppppppbrisnsliest
    14·1 answer
  • Question 3
    6·1 answer
  • Find the area of parallelogram below 8 12
    10·2 answers
  • PLEASE HELP ME ANSWER THIS QUESTION PLEASEEEE I WILL GIVE BRAINLIST!!!!!!!!!!!!!!!!!!!!!
    11·2 answers
  • Select the correct answer Which pair of statements correctly compares the two data sets? 11 12 9 10 13 6 8 4 5 7 3 0 2 1 : 00 .
    9·1 answer
  • Write value of each digit in 167.7
    10·2 answers
  • What is the value of x in the equation 3(4x-6) - 2x + 1 = 3 -(3x -6)
    5·2 answers
  • 9 + |-78| - (-22)<br><br> Answer truthfully please.
    7·1 answer
  • State any two types of natural vegetation?
    15·1 answer
  • There are 20 machines at the gym and Manuel wants to perform exercises on 5 different machines while he is there. How many diffe
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!