Answer:
We conclude that the population means checkout times of the two new systems differ.
Step-by-step explanation:
We are given the result in the following summary of the data;
System System B
n1=120 n2=100
x1=4.1 min x2=3.4 min
σ1=2.2 min σ2= 1.5 min
Let = population mean checkout time of the first new system
= population mean checkout time of the second new system
So, Null Hypothesis, : {means that the population mean checkout times of the two new systems are equal}
Alternate Hypothesis, : {means that the population mean checkout times of the two new systems differ}
The test statistics that will be used here is Two-sample z-test statistics because we know about population standard deviations;
T.S. = ~ N(0,1)
where, = sample mean checkout time of the first new systems = 4.1 min
= sample mean checkout time of the second new systems = 3.4 min
= population standard deviation of the first new systems = 2.2 min
= population standard deviation of the second new systems = 1.5 min
= sample of the first new systems = 120
= sample of the second new systems = 100
So, the test statistics =
= 2.792
The value of z-test statistics is 2.792.
Now, at 0.05 level of significance, the z table gives a critical value of -1.96 and 1.96 for the two-tailed test.
Since the value of our test statistics does not lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.
Therefore, we conclude that the population mean checkout times of the two new systems differ.
Answer:
A
Step-by-step explanation:
Answer: A.) The warmer the air temperature, the greater the humidity.
Step-by-step explanation: This is simply what the graph is conveying. As you can see, the line goes up with water vapor and temperature signifying that when the temperature goes up so does the humidity.
The graph show\ing the demand (D) and supply (S = MC) curves in the market for hot dogs indicate: Competitive market.
In a market were their is competition, when demand and supply curves intersect this indicate market equilibrium.
Based on the graph the market equilibrium price will be $1.50 per hot dog while on the other hand the market equilibrium quantity will be 250 hot dogs which is the point were demand and supply intersect.
Inconclusion the market for hot dogs indicate: Competitive market.
Learn more about competitve market here:brainly.com/question/25717627
Answer:IF each vendor has his own price or (ppower) so far every single vendor will have his own price.
Step-by-step explanation:
Answer:
(1.95 +1.65)c -0.75 = 2.49
Step-by-step explanation:
The cost of the fruit is the cost per pound (c) multiplied by the number of pounds, 1.95 +1.65. After $0.75 is deducted, the total cost is $2.49. The equation that says this is ...
(1.95 +1.65)c -0.75 = 2.49
__
3.6c = 3.24 . . . . add 0.75, simplify
c = 0.9 . . . . . . divide by the coefficient of c
The cost of the fruit is $0.90 per pound.
. F(m)
. F (1)+g(2)
. F(11)
Answer:
Step-by-step explanation:
3x + 5y = 7
Since that is our original form, let's convert it so that we can find the slope:
5y = -3x + 7
y = -3/5 x + y
To get a perpendicular line, we need the negative reciprocal of the slope. This means that the sign switches and numerator and denominator flip:
m = 5/3
From here, we use the point-slope equation and then convert that into slope-intercept form:
y - y1 = m(x - x1)
y - 6 = 5/3(x - 0)
y - 6 = 5/3x
Answer:
the probability that the average height of 25 randomly selected women will be bigger than 66 inches is 0.0013
Step-by-step explanation:
From the summary of the given statistical dataset
The mean and standard deviation for the sampling distribution of sample mean of 25 randomly selected women can be calculated as follows:
= 64.5
= 0.5
Thus X N (64.5,0.5)
Therefore, the probability that the average height of 25 randomly selected women will be bigger than 66 inches is:
the probability that the average height of 25 randomly selected women will be bigger than 66 inches is 0.0013
The equation of the line perpendicular to x = -4 that passes through the point (-2,5) is y = 5 .
In the question ,
it is given that
the required line is perpendicular to x = -4
the slope of x = -4
x + 4 = 0
0.y = x + 4
slope = 1/0
so the slope of the perpendicular line 0 .
the equation of the perpendicular line passing through (-2,5) and slope as 0 is
(y - 5) 0*(x + 2)
y -5 = 0
y = 5
Therefore , The equation of the line perpendicular to x = -4 that passes through the point (-2,5) is y =5 .
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