Answer:
And the 90% confidence interval would be given (0.773;0.827).
Step-by-step explanation:
The information given is:
represent the number of individuals with the characteristic
the sample size
The confidence interval would be given by this formula
For the 90% confidence interval the value of and , the critical value for this case is:
And replacing into the confidence interval formula we got:
And the 90% confidence interval would be given (0.773;0.827).
<span>1) The number of subscribers to magazine A in 2000 is 5,000 more than the number of subscribers to magazine B in 2000.
2) Which of the following describes the number of subscribers represented by the tables?
The number of subscribers to both magazines are decreasing.
3) As the number of years since 2000 increases, the number of subscribers both magazines approach zero.</span>
Mean=5
sd=2
Using Z(x)=(x-mean)/sd
Z(2)=(2-5)/2=-1.5
Z(6)=(6-5)/2=0.5
Therefore
probability of finding a spot between 2 and 6 minutes is
P(x<6)-P(x<2)
=P(Z<0.5)-P(Z<-1.5)
=0.6915-0.0668
=0.6247
=>
More than half of the students (62.5%) finds a space between 2 and 6 minutes.
Step-by-step explanation:
x=7
(x-7)=0
x=0
x=3
(x-3)=0
x=-2
(x+2)=0
x(x+2)(x-3)(x-7)
x(x+2)(x²-7x-3x+21)
(x²+2x)(x²-10x+21)
x⁴-10x³+21x²+2x³-20x²+42x
x⁴-8x³+z²+42x