Formula to find mean and standard deviation is,
Means = np and standard deviation =.
Where n= sample size, p = probability.
According to the given problem, the probability that an individual has 20 vision is 0.19 in a class of 70 students. So,
p = 0.19 and n = 70.
Hence, the first step is to plug in these values in the above formula to get mean and standard deviation. Therefore,
Mean = np
= 70* 0.19
= 13.3
= 13.300 (Rounded to nearest thousandth.
Standard deviation =
=
=
=√10.773
=3.282224855
= 3.282 (Rounded to nearest thousandth).
568 and 836 hope that helps I don’t really know
Answer:
Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true mean is different from 50.5 mpg
Step-by-step explanation:
Data given and notation
represent the sample mean
represent the population standard deviation for the sample
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
z would represent the statistic (variable of interest)
represent the p value for the test (variable of interest)
Sytem of hypotheses.
We need to conduct a hypothesis in order to check if the true mean is different from 50.5, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Replacing we got:
P-value
Since is a two tailed test the p value would be:
Conclusion
Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true mean is different from 50.5 mpg
Answer:
q=6 and r=7 look at pic for work
Answer:
The value of given expression is 3.8.
Step-by-step explanation:
Given:
We need to find the simplified value of given expression using y =14
Solution:
Now we will substitute y =14 we get;
Now using PEDMAS we will first solve the parenthesis we get;
Now we will solve the exponent function we get;
we know that;
So we can say that;
Now we will solve the multiplication operation.
Now we will perform addition operation.
And finally we will perform subtraction operation.
3.8
Hence The value of given expression is 3.8.