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
Citrus2011 [14]
3 years ago
7

A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of customers who visited

the salon were 40, 30, 28, 22, 36, 16, and 50. It can be assumed that weekday customer visits follow a normal distribution. [You may find it useful to reference the t table.] a. Construct the 90% confidence interval for the average number of customers who visit the salon on weekdays. (Round intermediate calculations to at least 4 decimal places, "sample mean" and "sample standard deviation" to 2 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.)

Mathematics
1 answer:
morpeh [17]3 years ago
5 0

Answer:

a: 28 < µ < 34

Step-by-step explanation:

We need the mean, var, and standard deviation for the data set.  See first attached photo for calculations for these...

We get a mean of 222/7 = 31.7143

and a sample standard deviation of: 4.3079

We can now construct our confidence interval.  See the second attached photo for the construction steps.

They want a 90% confidence interval.  Our sample size is 7, so since n < 30, we will use a t-score.  Look up the value under the 10% area in 2 tails column, and degree of freedom is 6 (degree of freedom is always 1 less than sample size for confidence intervals when n < 30)

The t-value is: 1.943

We rounded down to the nearest person in the interval because we don't want to over estimate.  It said 28.55, so more than 28 but not quite 29, so if we use 29 as the lower limit, we could over estimate.  It's better to use 28 and underestimate a little when considering customer flow.

You might be interested in
Find the Value of X. Thanks for helping
ser-zykov [4K]

Answer:

uhm  i don't understand

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What transformation is shown below?
hram777 [196]
The transformation is rotation.
7 0
3 years ago
Read 2 more answers
Will song be kind &amp; help me out
Nuetrik [128]
D) 15.24 centimeters
7 0
3 years ago
What goes inside the table
Tomtit [17]

Basically what you have to do is take the x which for the first question would be -2 and you would subtract it by 1 and you would get -1and then you would do the same thing so on and so forth.

If that doesn't help then just plug the X into the equation

5 0
2 years ago
Find a point- slope form for the line with slope 1/5 and passing through the point (-4,-6)
weeeeeb [17]

Answer: y-(-6)=1/5(X-(-4))

Step-by-step explanation:

to put together a point slope expresion the equation would be y-y1=m(x-x1)

y1 and x1 being the points on the line and (m) being the slope

8 0
2 years ago
Other questions:
  • How many milliliter of pure acid should be added to 10 ml of 20% acid to make 50% acid solution? Round answer to the nearest hun
    12·1 answer
  • PLEASE HELP SOON. i have been stuck on this algebra 1 question for what feels like an eternity can someone please help and soon?
    7·1 answer
  • if triangle ABC is an isosceles triangle and triangle DBE is an equilateral triangle, find each missing measure
    7·1 answer
  • Jake, Lionel, and Wayne work as house painters for Paint Well Company. Jake can paint 1 room in t hours. Lionel can paint a room
    8·1 answer
  • The points Q, R, S and T all lie on the same line segment, in that order, such that the ratio of Q R : R S : S T QR:RS:ST is equ
    8·1 answer
  • 2x+3x+3+4xto the second power +10+x
    8·1 answer
  • Number line showing 7/10
    8·1 answer
  • Eight less than double a number is ten. What is the number?
    9·1 answer
  • How do I do this problem?
    8·2 answers
  • I dont know…………………..
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!