Answer:
0.9608
Step-by-step explanation:
P = 56%
56% = 0.56
1-p
1-0.56
= 0.44
√p(1-p/n
= √0.56(1-0.56)/886
= √0.0002781
= 0.01667
= 0.017
0.59-0.56/0.017
= 1.76
P(z <1.76)
When we check the z table,
Probability is equal to 0.9608
Answer:
x = -2
y = -1
Step-by-step explanation:
2x+y = -5 so y = -5-2x
3x+2y = -8
substitute for y
3x+2(-5-2x) = -8
3x-10-4x = -8
-10-x = -8
add 10 to both sides
-10+10-x = -8+10
-x = 2
divide both sides by -1
-x/-1 = 2/-1
x = -2
y = -5-2(-2)
y = -5+4
y = -1
Well that would not work 5.25x2=10.5 5.25x3=15.75
Answer:
A. If a bird is a crow, then it is black.
Step-by-step explanation:
Answer:
All but last statement are correct.
Step-by-step explanation:
- <em>If we were to use a 90% confidence level, the confidence interval from the same data would produce an interval wider than the 95% confidence interval.</em>
True. Confidence interval gets wider as the confidence level decreases.
- <em>The sample proportion must lie in the 95% confidence interval. </em>
True. Confidence interval is constructed around sample mean.
- <em>There is a 95% chance that the 95% confidence interval actually contains the population proportion.</em>
True. Constructing 95%. confidence interval for a population proportion using a sample proportion from a random sample means the same as the above statement.
- <em>We don't know if the 95% confidence interval actually does or doesn't contain the population proportion</em>
True. There is 95% chance that confidence interval contains population proportion and 5% chance that it does not.
- <em>The population proportion must lie in the 95% confidence interval</em>
False. There is 95% chance that population proportion lies in the confidence interval.