Question

Please answer True or False for the following statements:

1.) The question "do more than 40% of bird owners own cats" leads to a two-tailed test?

2.) The graph of the normal distribution is perfectly symmetrical, or a mirror image about the mean.

3.) In hypothesis testing, the alternative or motivated hypothesis is assumed to be true.

4.) Type 1 error is the error we make in failing to reject the null hypothesis.

5.) For a normal curve, about 95% of the distribution lies between mu - 2sigma and mu + 2sigma.

Answer #1

(1) False, "do more than 40% of bird owners own cats" is a right tailed hypothesis test because of "more" symbol. So, it is not a two tailed

(2) True because we know that the graph of normal distribution is symmetrical and have same mirror image on both sides of the mean.

(3) False, we assume that the null hypothesis is true and we test the hypothesis to check if the null hypothesis can be rejected or not. So, it is false

(4) False, we know that type I error is the rejection of a true null hypothesis. So, it is not related to the failure to reject the null hypothesis

(5) True, using the empirical rule, we know that 95% of the data values fall within 2 standard deviations from the mean. So, given statement is true

Please answer True or False for the following statements:
1.) In hypothesis testing, if the null hypothesis is rejected,
then the alternative or motivated hypothesis must also be
rejected.
2.) Under certain conditions, binomial distributions can be
approximated by normal distributions.
3.) Using a normal distribution to approximate binomial
probabilities is extremely accurate, but takes an excessive amount
of time and should be avoided.
4.) A bell-shaped curve is still normal, even if the mean,
median, and mode are not...

Do all the following problems.
I. Choose the best answer for each
multiple choice. Please use CAPITAL letters to indicate your answer
and write neatly. (30 points)
1. ____ 4.____ 7. ____ 10.____ 13.
____
2. ____ 5.____ 8. ____ 11.____ 14.
____
3. ____ 6.____ 9. ____ 12.____ 15.
____
Whenever the population standard deviation is unknown and the
population has a normal or near-normal distribution, which
distribution is used in developing an interval estimation?
A. standard distribution
B....

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

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