Answer:
The value of the test statistic is 4.26.
Step-by-step explanation:
In this case a hypothesis test is performed to determine whether most adults would erase all of their personal information online if they could.
A random sample of <em>n</em> = 453 adults were selected and it was found that 60% of them would erase all of their personal information online if they could.
Assume that the population proportion is, <em>p</em> = 0.50.
A <em>z</em>-test for single proportion would to used to perform the test.
Compute the value of the test statistic as follows:
Thus, the value of the test statistic is 4.26.
Answer:
A, C, and D
Step-by-step explanation:
Remember that in a function, every unique input must have one output. Therefore, two or more outputs cannot have the same input. Knowing this, we can eliminate choice B. Therefore, A, C, and D are correct.
Answer:
Step-by-step explanation:
Yes. x would be 75. For the second part yes. she would have to get 100 % on her last test.
Answer:
Step-by-step explanation:
information given
represent the sample mean
represent the population standard deviation
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
z would represent the statistic
represent the p value for the test
Hypothesis to test
We want to test if the true mean is less than 12, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Replacing the info given we got:
We can replace in formula (1) the info given like this:
