Need help on how to solve some questions on my homework:
1. What type of graph can I use to recor the colors of students eyes?
2. In a pie graph displaying the number of pizzas sold one day, the number of pepperoni pizzas sold is represented by a 90° section. If there were 72 pizzas sold in total that day, how many were pepperoni
8. If the mean of a data set is 23.0 and the standard deviation is 10.0, what is the z-score for x =30.5
9. Determine the range for this data: -6, 2, -8, 3, 11
10. According to the Empirical Rule, the Range Rule of Thumb assumes the range of a set of data spans what percent of the distribution when estimating the standard deviation

Solution Preview

Hi there,

Thanks for allowing me to work on your questions. Here are my answers:

1. Bar graph (available in excel program) can be used to record the colors of students eyes.
2. According to the information, the percentage of ...

Solution Summary

This solution covers problems including empirical rule, pie graph, range, standard deviation, z value and so on.

Yes or no: Is an F-statistic used to test the global hypothesis in multiple regression analysis?
Please demonstrate calculations and findings: If a multiple regression analysis is based on 10 independent variables collected from a sample of 125 observations, what will be the value of the denominator in the calculation of the

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

Please choose the correct answers and write briefly why:
For a given multiple regression model with three independent variables, the value of the adjusted multiple coefficient of determination is _________ less than R2.
a. Always
b. Sometimes
c. Never
d. Can be greater or less depending on the standard error

Need to find the value of the Test Statistic and calculate the mean squares for regression and error for the following:
101.44/2 and 528.32/25
The answer is F= 2.40; however, I cannot determine the formula to use to arrive at this answer.

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

1. A multiple regression analysis includes 25 data points and 4 independent variables results in SST = 200 and SSR = 150. the multiple standard error of estimate will be?
2. A professor claimed that the proportions of grades in his classes are the same. A sample of 100 students showed the following frequencies:
grade

Gina is seriously thinking about buying riley inc the stock is growing 25% annually its is paying 1.50 in annual dividends and has multiple pe ratio of 80 times the average statistic for comparable firms in the market are as follows growth 12%. Dividends $1.12 and the multiple is 15 show mathematically. How long Gina has to hold

Bob wanted to build a multiple regression model based on advertising expenditures and price index. based on the selection of all normal values, he obtained the following:
1) Multiple R - 0.738
2) R-Square - 0.546
By using lagged values, he came up with the following:
3) Multiple R - 0.755
4) R-Square - 0.570
Explai

1. H0: Σ 2 <= 22
Ha: Σ 2 > 22
A sample of 29 ages from a normal population yields a sample variance of 32.9. You want to test the following hypothesis using α=.025
What is the test statistic?
What is the critical value?
2. H0: Σ 2 >= 24
Ha: Σ 2 < 24
A sample of 28 ages from a normal popula

Case A: If all the sample means were exactly the same, what would be the value of the numerator of this F-statistic?
Case B: If all the sample means were very spread out and very different from each other, how would the variation between the sample means compare to the value in Case A?
So what values could the F-statistic