Can you explain if a researcher computed the F ratio for a four-group experiment? The computed F is 4.86. The degrees of freedom are 3 for the numerator and 16 for the denominator.
1. Is the computed value of F significant at p < .05? Explain.
2. Is it significant at p < .01? Explain.

Solution Summary

The solution provides a step by step method for the calculation of p-value using F-statistic.

a) Given the equation: (See attached), what is the calculated t-statistic and is it significant at the 5 percent level? (Hint: Apply 2 rules)
b) Calculate the coefficient of correlation from the information in (a). Write the H_o and H_a. Then, make a decision about the significance of the coefficient of correlation.
c) Wha

Hi, I need assistance finding the value of the test statistic z using the below model:
z = p - p / square root pq/n
Question: The claim is that more than 75% of adults always wear a seat belt in the front seat. A Harris poll of 1012 adults resulted in 870 who say that they always wear a seat belt in the front seat.

Consider the e-billing case. The mean and the standard deviation of the sample of n = 65 payment times are = 18.7598 and s = 3.9494. Test H0: μ = 19.1 versus Ha: μ < 19.1 by setting α equal to .01 and using a critical value rule and assume normality of the population. (Round your "t" and "t0.01" answers to 3 decimal places

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is µ d = 0. Compute the value of the t test statistic.
x 7 2 7 3 10
y 4 4 3 4 5
t=1.292
t=0.578
t=0.415
t = 1.203.
See attached file.

1.)If the population standard deviation ( s) is known then we use it in calculating the z-statistic as follows.
z= [Xbar - m ] / [ s/ sqrt(n) ]
On the other hand if population standard deviation is unknown, we substitute the sample standard deviation (s) in place of population standard deviation in calculating the z-statist

5 Steps of Hypothesis testing, test that there is no difference between each set.
Level of significance is .05
What type of error could be made?
A
15000 16000 14000 13000 14000
13000 15000 14000 13000 14000
13000
B
15000 13000 17000 15000 14000
19000 14000 16000 19000
The answer needs t

I am having trouble understanding this multiple choice question.
The reason the t statistic has more variability than the z statistics is that from sample to sample
a. the sample mean becomes smaller and the sample variance becomes larger
b. the sample mean becomes larger and the sample variance becomes smaller
c. neithe

A machine used for packaging seedless golden raisins is set so that their standard deviation in the weight of raisins packaged per box is 0.25 ounce. The operations manager wishes to test the machine setting and selects a sample of 30 consecutive raisin packages filled during the production process. Their weights are as record

Determine whether the given value is a statistic or a parameter.
a) A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer.
b) After taking the first exam, 15 of the students dropped the class. Is this a statistic or a paramet