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
inessss [21]
3 years ago
15

. A survey found that women spend on average $146 on beauty products during the summer months. Assume the standard deviation is

$28. Find the percentage of women who spend less than $160.00. Assume the variable is normally distributed.
Mathematics
2 answers:
arsen [322]3 years ago
7 0

Answer:

69.1% of the woman spend less than $160

Step-by-step explanation:

Assuming that the random variable X= spend on beauty products by women during summer months distributes normally , then using the standarized variable Z:

Z= (X - mean / st. dev) = (160.00-146 )/28 = 0.5

then using normal probability tables for Z:

P(X<160)=P(Z<0.5) = 0.691 (69.1%)

thus 69.1% of the woman spend less than $160

Romashka-Z-Leto [24]3 years ago
5 0

Answer: 69.2%

Step-by-step explanation:

Assuming that the amount that women spend on beauty products during the summer months is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = amount spent.

µ = mean

σ = standard deviation

From the information given,

µ = $146

σ = $28

The probability of women who spend less than $160.00 is expressed as

P(x < 41)

For x = 160

z = (160 - 146)/28= 0.5

Looking at the normal distribution table, the probability corresponding to the z score is 0.6915

Therefore, the percentage of women who spend less than $160.00 is

0.6915 × 100 = 69.2%

You might be interested in
PLEASE HELP I DONT KNOW HOW TO DO THIS
sergij07 [2.7K]

Answer:

step by step

Step-by-step explanation:

where

r = radius

h= height

Area of a cylinder = 2πrh+2πr^2

Area of a cylinder = 2π8(3)+2π8^2

Area of a cylinder = 176π = 552.92

Area of a hemisphere= 3r2π

Area of a hemisphere= 3(2)2π

Area of a hemisphere= 12π = 37.699111843

Area of the cylinder in this problem

176π - 12π = 164π

8 0
3 years ago
Juan reads a book with 368 pages. savannah reads a book with 172 fewer pages than juan's book. how many pages are in the book sa
Step2247 [10]
196 pages fewer than savannah
3 0
3 years ago
Read 2 more answers
How do you graph for the function Y= -x+1
Tanzania [10]
-x = -1. Anything “X” equals to the number One. So do Y = -1 + 1.
5 0
2 years ago
Read 2 more answers
Plzzzzz help 3 9/10 is the same as the sum of 3 1/3 and half of a number what is the number​
kirill [66]

Answer:

9/10 = 1/3 + 1/2x

9/10 - 1/3 = 1/2x

LCM of 10 and 3 is 30

( 27 - 10)/30 = 1/2x

17/30 = 1/2x

17 * 2 = 30x

34=30x

34/30= 30x/30

x = 17/15

6 0
2 years ago
My lawn is 17ft wide and 20ft long, each square foot of lawn gets 1350 new snowflakes per min how much snow in kilograms accumul
Alina [70]

Answer:

46.818 kg

Step-by-step explanation:

First, find the surface area of your yard. This is found by multiplying the length and width.

The equation for this is (l*w)=sa

So,

l=20ft

w=17ft

(20*17)= 340 square feet.

So, if each square foot gets 1350 new flakes per minute, you are going to find how much the entire yard gets in a minute by multiplying the surface area by 1350.

So,

(340*1350)= 459000  flakes for the entire yard in one minute.

Since there is 60 minutes in an hour, multiply 459,000 by 60.

459,000*60= 27,540,000  new flakes in the yard per hour.

Now, to find the weight in milligrams:

27,540,000*1.7= 46,818,000  mgs

Finally, because a kilogram is equal to one million milligrams (mg),

46,818,000/1,000,000= 46.818 kg

7 0
3 years ago
Other questions:
  • What is the volume of a right circular cylinder with a base diameter of 17.5 ft and a height of 24.5 ft?
    9·2 answers
  • Here's a graph of a linear function. Write the
    13·1 answer
  • How many hours are there in 1 month if there are 31 days in a month. Will mark brainliest.
    10·2 answers
  • S.P. + vat of TV. = 4950<br> Vat% - 10%<br> S.P of TV, with out vat = ?
    5·1 answer
  • Solve the problem 1/5+2/5+3/5=
    15·2 answers
  • Can someone please ell me the answer to this, please? :)
    8·1 answer
  • What percentage is 4 dimes?​
    15·1 answer
  • List the numbers in order from least to greatest:<br><br> -4, -9/4, 1/2, 3.7,
    8·2 answers
  • How do I add odd number fractions for example 5/9 and 3/5?​​
    5·2 answers
  • How many times does 5.4 go into 60 if it starts at -18?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!