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REY [17]
3 years ago
7

A department store finds that in a random sample of 200 customers, 60% of the sampled customers had browsed its website prior to

visiting the store. Based on this data, a 90% confidence interval for the population proportion of customers that browse the store’s website prior to visiting the store will be between
Mathematics
1 answer:
vfiekz [6]3 years ago
3 0

Answer:

between 108-110?

Step-by-step explanation:

60% or 200 = 120 people

90% of 120 = 108

question doesnt look complete so this is the best I could come up with...‍♀️

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Solve the system by substitution. Check your solution.
Zepler [3.9K]

Answer:

a.  (15, 15)

Step-by-step explanation:

We start with those two equations:

1) a - 1.2b = -3

2) 0.2b + 0.6a = 12

We'll begin by modifying equation #1 to isolate a:

a = -3 + 1.2b

Then we'll use this value for a in the second equation:

0.2b + 0.6 (-3 + 1.2b) = 12

0.2b - 1.8 + 0.72b = 12

0.92b = 13.8

b = 15

Then we'll place that value of b in the first equation to find a:

a - 1.2 (15) = -3

a - 18 = -3

a = 15

3 0
3 years ago
Help thanksss. its mutiple choice
Flura [38]

Answer:

Points C,D, E and F are coplanar.

3 0
3 years ago
What is three and one third divided by two aand one third?
grin007 [14]
1 3/7 ~ One and three sevenths
4 0
4 years ago
Four less than the product of a number and 7 is eight more than that number
AveGali [126]

Answer:

i did a wild guess and i got  the answer is 2

Step-by-step explanation:

2*7=14

14-4=10  

10-2=8

8 0
3 years ago
Major league baseball salaries averaged $3.26 million with a standard deviation of $1.2 million in a recent year. suppose a samp
Anastaziya [24]
Given:
μ = $3.26 million, averaged salary
σ = $1.2 million, standard deviation
n = 100, sample size.

Let x = random test value
We want to determine P(x>4).

Calculate z-score.
z = (x - μ)/ (σ/√n) = (4 - 3.26)/(1.2/10) = 6.1667

From standard tables,
P(z<6.1667) = 1
The area under the distribution curve = 1.
Therefore
P(z>6.1667) = 1 - P(z<=6.1667) = 1 - 1 = 0

Answer: The probability is 0.

8 0
3 years ago
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