A salesman at a clothing store makes a sale to 30% of the customers he talks to, and wants to try out a new tecnique to see if he can change this rate. He decides to collect data for a few months on the percentage of customers he makes a sale to, and he is able to construct a 95% confidence interval of (.3095, .3275). Is there evidence at 5% significance that he has changed his average sales?

Answers

Answer 1

Answer:

Yes, we can conclude that average sales has changed.

Step-by-step explanation:

The null hypothesis, H0 : μ = 0.3

The alternative ; H0 : μ ≠ 0.3

The result of the 95% confidence interval of (.3095, .3275); This shows that the confidence interval is now between 30.95% and 32.75% ; since μ does not lie within the confidence interval value and the lower boundary of the confidence interval is > 30; we Can conclude with an evidence of 5% significance that his average sales as changed (increased).

We can reject H0 and conclude that μ > 0.3

Related Questions

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ALSO 50 POINTS!

Answers

Answer:

h = 12 m

[tex] v_{cylinder}= 235.5 \: {m}^{3} [/tex]

Step-by-step explanation:

Radius of cylinder (r) = 5/2 = 2.5 m

[tex] {h}^{2} = {13}^{2} - {5}^{2} \\ h = \sqrt{ {13}^{2} - {5}^{2} } \\ h = \sqrt{169 - 25} \\ h = \sqrt{144} \\ h = 12 \\ \\ v_{cylinder} = \pi {r}^{2} h \\ v_{cylinder}= 3.14(2.5) ^{2} (12) \\ v_{cylinder}= 235.5 \: {m}^{3} [/tex]

a recipe for bread uses 2 cups of liquid and 6 cups of flour for 3 loaves of bread. how many cups of flour are needed for 10 loaves and how much liquid is needed if 21 cups of flour are used?

Answers

Step-by-step explanation:

I just did this in a lesson

Faithi has $ 1.10 in his printing account. Each sheet of paper he use reduces his printing account balance by $0.25. Fathi wants to print out a pdf document that is 47 page long. To save paper, he decide to print on both side of each sheet and to print two pages on each side of the sheet

Answers

Answer:

-$1.9

Step-by-step explanation:

if it has work to show, please include it. please help

Answers

Answer:

B) 256

Step-by-step explanation:

You are doubling the amount of boxes there are each time:

Pattern 1: 1 box

Pattern 2: 2 boxes

Pattern 3: 4 boxes

Pattern 4: 8 boxes

Pattern 5: 16 boxes

Pattern 6: 32 boxes

Pattern 7: 64 boxes.

Each box takes 4 matches to create. There are 64 boxes in total by the 7th pattern. Multiply 4 with 64:

64 x 4 = 256

B) 256 matches is your answer.

We have to fill the chart but i already did that i just need help with the questions

(B) find the mean of the data set

(C) Find the median

(D) find the mode of trje data set

(E) find the range of the data set

Answers

C hope that helped have a good one love the game

mallory and five of her friends bought a box of 36 cookies. together they ate 2/3 of the cookies

Answers

Answer:

24 cookies got eaten 12 weren't eaten

Step-by-step explanation:

36 divided by 3 = 12

12 x 2 = 24 ( since they ate 2/3)

36-24=12 (12 weren't eaten)

A meteorologist in Seattle says there is a 75% chance of rain. A meteorologist in Tacoma says there is a 1/4 chance of rain. In which city is it more likely to rain?

A. Seattle
B. Tacoma
C. Batesville
D. Both have the same chance

Answers

Answer: A. Seattle

Steps:
1/4 = 25%

Which is more 25% or 75%?
The answer is 75%

Assuming both predictions are correct, converting the number forms into the same form, we can see that it is equally likely to rain in either city.
Explanation:
Firstly, we're going to assume that both predictions are correct, because, well, they're just predictions. Let's write them down:
Seattle Rain Chance
=
75
%

Tacoma Rain Chance
=
3
4

Now, we can see that both predictions are in different forms: one in the form of percentage, and the other in the form of a fraction. To compare, we could convert one of them... Let's convert the fraction into a percentage. But, how?
Well, what "percent" means is "per hundred". We could multiply the number by
1
, which shouldn't change anything...
... but then convert it to
100
100
(because they both divide out into
1
)...
... and finally, by definition, to
100
%
:
1
=
100
100
=
100
%

Tacoma Rain Chance
=
Tacoma Rain Chance
⋅
1
Tacoma Rain Chance
⋅
1
=
Tacoma Rain Chance
⋅
100
%
Let's evaluate it:
Tacoma Rain Chance
=
3
4
⋅
100
%
=
300
4
%
=
75
%
Now let's compare it to the Seattle rain chance:
Seattle Rain Chance
=
75
%

Whew, they're equal!
Seattle Rain Chance
=
Tacoma Rain Chance
Therefore, with the assumption that both predictions are correct, it is equally likely to rain in either city.

MODELING WITH MATHEMATICS The backboard of the basketball hoop forms a right triangle with the supporting rods, as shown. Use the Pythagorean Theorem to approximate
the distance between the rods where they meet the backboard. Round your answer to the nearest hundredth

Answers

I can’t see the numbers. I want to help but can’t see the numbers.

7th grade math help me pleaseee

Answers

Part A. n+6=15>>>n=9

Part B.n+6=15 >>> n+6-6=15-6

n=9

What is the length of AD??

Answers

Answer:(x-0)^2 + (y-0)^2=30^2

Step-by-step explanation:

The equation of the circle is x^2 +y^2 = 7656.25

How to determine the equation of the circle?

The given parameters are:

Center = (0,0)

Diameter = 175

The equation of a circle is represented as:

(x - a)^2 +(y - b)^2 = r^2

Where

Center = (a,b) = (0,0)

r = radius = 175/2

So, we have:

(x - 0)^2 +(y - 0)^2 = (175/2)^2

Evaluate

x^2 +y^2 = 7656.25

Hence, the equation of the circle is x^2 +y^2 = 7656.25

Read more about circle equations at:

https://brainly.com/question/1506955

Find the factor pairs for 12 1 and 12 2 and 6 3 and 4 the factors of 12 are 1,2,3,4,6,and 12

Answers

Answer:12 = 12.

x 6 = 12.

x 4 = 12.

x 3=12

Step-by-step explanation:

Ig the answer is 12

Simplify. Your answer should only contain positive exponents (−2−2)5•44

Answers

i got -880 , i’m not sure you can get only
positive exponents...

Answer:

-21.76

Step-by-step explanation:

(-2-2)5•44

-4×5•44

-4×544 (2 decimal places)

100

-2176 (multiply -4 x544)

100

Since 100 has two zeros, -21•76 becomes the answer.

hi anyone? please help!!

Answers

Answer:

8x<80

Step-by-step explanation:

The teams are teams of 8, so 8x is how many people on a team (8) times total number of teams (x). You want it to be less than 80, because, as it said, fewer than 80 people signed up.

No files!!! Math work. Help.

Answers

Answer:

Number 6 would be (a) 88 degrees

Number 7 would be (c) 45 degrees

Step-by-step explanation:

What is this Geometry? I haven't done this in so long so i went to look it up online and was shocked because of how much i was overthinking it.

For number 6, since we already have the angle listed as 44 degrees, to find the arc degrees, we would multiply the 44 by two. The formula is basically mAB=2(m<C)=88.

For number 7, we already have the arc degrees, so we would have to divide by two in this case to find the angle. The formula for this would be m<X=1/2(mYZ)=45.

A survey of 100 high school students provided this
frequency table on how students get to school:
Drive to Take the
Grade
Walk
School bus
Sophomore 2
25
3
Junior
13
20
2
25
5
5
Senior
What is the probability that a randomly selected student
is a junior who takes the bus?
?
P(Junior' n Take the bus)

Answers

Answer:

The answer is 1/5

Step-by-step explanation:

Trust me.

The probability that a randomly selected student is a junior who takes the bus is [tex]\frac{1}{5}[/tex] .

What is probability?

Probability or chance is how likely something is to happen. If something has a low probability, it is unlikely to happen. If something has a high probability, it is likely to happen.

[tex]probability=\frac{number\ of\ favourable\ cases }{total\ number\ of cases}[/tex]

Given,

Total number of students = 100

Number of students who are juniors and take bus = 20

[tex]probability=\frac{number\ of\ favourable\ cases }{total\ number\ of cases}[/tex]

Probability of junior students who take bus = [tex]\frac{20}{100}[/tex]

Probability of junior students who take bus = [tex]\frac{1}{5}[/tex]

Hence, The probability that a randomly selected student is a junior who takes the bus is [tex]\frac{1}{5}[/tex] .

Learn more about Probability:

https://brainly.com/question/14210034

#SPJ2

Literal Equations:

Solve the equation for the indicated variable.

a−c=d−r, for c

Group of answer choices

c=−d+r+a

c=d−r/a

−c=d−r−a

c=d−r+a

Answers

Answer:

−c=d−r−a

Step-by-step explanation:

if we move a value to the other side of the equal sign, the value switches positive and negative signs, in this case A moved to the right, which caused it to turn negative.

A model rocket is launched from
the top of an observation tower
that is 75 feet high. The height
of the rocket, h(t), is
determined by the function
h(t)--16r2 + 48t +75 where t is
the number of seconds elapsed
since the rocket was launched.
When does the rocket land on
the ground? Round to the
nearest hundredth.

Answers

Answer:

>>> t = 3/2 - sqrt(111)/4

>>> t = 3/2 + sqrt(111)/4

Step-by-step explanation:

-16r^2 + 48t +75=0

>>> t = 3/2 - sqrt(111)/4

>>> t = 3/2 + sqrt(111)/4

8r= -64
what does the 8r stand for?

Answers

Answer:

r=8

Step-by-step explanation:

The number we are looking for is represented by 'r' which is multiplied by 8

PLS HELP ASAP!!!

You and your family went out to dinner for your birthday. The cost of the meal was $75. You left and 18% tip, and the tax was 7.7%. What was the total cost of your dinner?

Answers

Answer:

$ 94.28

Step-by-step explanation:

75 x 1.18 = 88.50

75 x .077 = 5.78

88.50+5.78= 94.28

jeremy bought 5 pencils for w dollars. each pen cost 35¢ more than a pencil

Answers

248 I think sorry I don’t know really

In order to prove triangle similarity by AAA what does X have to equal?

Answers

Answer:

x has to be equal to 12

Step-by-step explanation:

In other to prove that the triangles are similar, the values of the angles at certain points must be equal

for example, the angle at the top vertices should be equal

So, we have it that;

6x = 3x + 36

6x-3x = 36

3x = 36

x = 36/3

x = 12

The average age of the seven apprentice magicians is 143 years. The average age of the seven apprentice magicians and the head wizard is 150 years. How old is the head wizard in years? Please need answer ASAP!!!!!!!!

Answers

assume each of the original three magicians is 143 years old
143 x 3 = 429
150 x 4 = 600
this means that the ages of the original three (429) plus the age of the head magician is 600
600 - 429 = 171

Answer:

it would be 200 points. Lets assume that all of the apprentice magicians are 143 years old. If so, then 143 x 7 = 1001. 1001 + 200 = 1201. 1021 ÷ 8 (the number of magicians) the answer is 150. so the age of head wizard is actually 200 years.

hellohello, this needs to be turned in tomorrow so if you could help, i would really appreciate it. :]

Answers

Answer and Step-by-step explanation:

We are given the side lengths, so all we have to do is multiply each rectangle's lengths and widths to get their areas, then add them together,

Top rectangle Area:

4 × 7 = 28

Bottom rectangle Area:

6 × 8 = 48

Now, we add them together.

Total Area:

28 + 48 = 76

The total area of the figure is 76 [tex]units^{2}[/tex].

#teamtrees #PAW (Plant And Water)

A circle has a center of (5, 2) and a radius of 10. Which the fallowing points will the circle pass through ?

Answers

Answer:

centre of the circle(h,k)=(5,2)

radius(r)=10

Step-by-step explanation:

Now,

equation of the circle is giveb by (x-h)^2+(y-k)^2=r^2

or,(x-5)^2+(y-2)^2=(10)^2

or,x^2-10x+25+y^2-4y+4=100

or,x^2+y^2-10x-4y+29-100=0

or,x^2+y^2-10x-4y-71=0

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