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
LiRa [457]
3 years ago
12

A bank located in a commercial district of a city has developed an improved process for serving customers during the noon to 1:0

0 PM peak lunch period. The waiting time (as defined as the time the customer enters the line until he or she is served) of all customers during this hour is recorded over a period of 1 week. A random sample of 15 customers is selected, and the results are as follows:
4.21, 5.55, 3.02, 5.13, 4.77, 2.34, 3.54, 3.20, 4.50, 6.10, 0.38, 5.12, 6.46, 6.19, 3.79

(a) Set up a 95% confidence interval for estimating the average waiting time during peak hours.
(b) At the 0.05 level of significance, is there evidence that the average waiting time is less than 5 minutes?
(c) Find the p-value for part(b).
(d) What assumption must hold in order to perform the test in part(b)?
Mathematics
1 answer:
irakobra [83]3 years ago
6 0

Answer:

Step-by-step explanation:

Given that a bank located in a commercial district of a city has developed an improved process for serving customers during the noon to 1:00 PM peak lunch period. The waiting time (as defined as the time the customer enters the line until he or she is served) of all customers during this hour is recorded over a period of 1 week.

A random sample of 15 customers is selected, and the results are as follows:

4.21, 5.55, 3.02, 5.13, 4.77, 2.34, 3.54, 3.20, 4.50, 6.10, 0.38, 5.12, 6.46, 6.19, 3.79

a) Mean difference= -0.713

Std error = 0.4229

df = 14

Margin of error = 0.9082

Confidence interval = (4.287-0.9082, 4.287+0.9082)

= (3.3788,5.1352)

b) H0: Mean = 5

Ha: Mean <5

Mean diference = 4.287-5 =-0.713

t=-1.686

c) p value = 0.0569

Since p >0.05 we accept null hypothesis.  The average time is less than 5 minutes cannot be accepted.

d)

Assumptions are:

The data is normally distributed

Scale of measurement should be interval or ratio

A randomized sample from a defined population

You might be interested in
Which expression represents the quotient of d and 11​
inna [77]

Answer:   :} where is the rest of the question

Step-by-step explanation:

3 0
2 years ago
Tim has 72 football cards and ben has 33 football cards. How many more football cards does tim have?
ankoles [38]

Answer:

the answer is 39


Step-by-step explanation:

you have to just easily subtract 72-33= 39


BRAINIEST PLZZZZ AND RATE ME

4 0
3 years ago
Read 2 more answers
Joan and her brother Justin left a hotel at the same time, driving in opposite directions at constant rates. After traveling for
inessss [21]

Answer:

Joan drive with a speed of 55 miles per hour.

Step-by-step explanation:

Given:- Travelling time (t) = 4 hours.

Travelled distance (d) = 480 miles.

Speed of Justin is 10 miles per hour faster than Joan.

To find:- Speed of Joan = ?

Solution:-

Let speed of Joan be x,

therefore speed of Justin = x+10          ---------------(from given)

Now, Total speed of Joan and Justin = x+x+10

Total speed of Joan and Justin = 2x+10 ------------(1)

Now formula for speed is,

Speed = \frac{distance}{time}

2x+10=\frac{480}{4}                        -------------(from 1 and given)

2x+10=120

2x=120-10

2x=110

\therefore x=\frac{110}{2}

\therefore x= 55

as x is the speed of Joan,

Therefore Joan drive with a speed of 55 miles per hour.

6 0
2 years ago
Read 2 more answers
Can someone give me the correct answer for this.
Minchanka [31]

Answer:

The correct answer is option C that is graph X.

Step-by-step explanation:

Given : 1 sack lunch has 3 sandwiches

x axis = Number of sack lunches

y axis = Number of sandwiches

The coordinate from the given data will be: (1,3)

So, from the given graphs the graph with coordinate point (1,3) is correct. It will also show change in number of sandwiches with respect to change in number of sack lunches.

7 0
3 years ago
How do you write a sentence about comparing the values of the nines in the number 199,204
Margarita [4]

Answer:


Step-by-step explanation:

The first 9 stands for 90,000 and the second for 9 000 so the first 9 is worth

90,000 / 9,000 equals 10 times the second one.

8 0
3 years ago
Other questions:
  • When labeling the sides of our triangle in regards to angle S, side x would be __________.
    11·1 answer
  • Part of a tiling design is shown. The center is a regular hexagon. A square is on each side of the hexagon, and an equilateral t
    8·1 answer
  • It's the one that says 25 plz help me it's under number 24
    9·1 answer
  • The quotient of 3 times a number "x" and 2 less 3 times the square of "x"​
    10·1 answer
  • A team of runners is needed to run a 1 3 -mile relay race. If each runner must run 1 9 mile, how many runners will be needed?
    11·1 answer
  • An expression is shown
    11·1 answer
  • Miss lynch's dog, jax weighs 12 times as much as Mrs. Vetterly's dog coco. There combined weight is 78 pounds. How much does jax
    13·2 answers
  • Express 5 cm in metre and kilometre.in decimals........................
    7·1 answer
  • If 7x7 is 49 what is 77x77?
    5·2 answers
  • Vicky can make 8 bracelets in 2 days. How many bracelets can she make in September
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!