Suppose the average male brain weight (in grams) is estimated to be 13201320 grams. A 1905...
Suppose the average male brain weight (in grams) is estimated to be 13201320 grams. A 1905 study by R.J. Gladstone measured the brain weight of 134134 randomly selected deceased male subjects. The data provided show the brain weights of each of the subjects.
Click to download the data in your preferred format.
CrunchIt! CSV Excel JMP Mac-Text Minitab PC-Text R SPSS TI-Calc
Suppose Gladstone has reason to believe that his data are different than the historical data, and he therefore wishes to test the hypothesis that the true mean brain weight of a male human is equal to 13201320 grams.
Select the true statement.
A ?t‑test is not appropriate to test this claim because the data were not collected using randomization.
A ?t‑test is not appropriate to test this claim because the distribution of brain weight is not roughly unimodal.
A ?t‑test is appropriate to test this claim.
A ?t‑test is not appropriate to test this claim because brain weight is not a quantitative variable.
A ?t‑test is not appropriate to test this claim because the sample size is too small.
The null hypothesis for this ?t‑test is
?0:?=1320H0:μ=1320
and the alternative hypothesis is
?1:?≠1320H1:μ≠1320
Conduct a ?t‑test at the ?=0.05α=0.05 level to test his claim. What are the ?t‑statistic and ?p‑value for this test? Please round your answers to the nearest three decimal places.
?t =
?p =
Homework Answers
Add Answer to:
Suppose the average male brain weight (in grams) is estimated to
be 13201320 grams. A 1905...
z-critical value: Based on your z-statistic and z-critical values, what can you conclude abot the researchers'...
z-critical value: Based on your z-statistic and z-critical values, what can you conclude abot the researchers' claim that survey respondents, on average, are older than the general Bangladesh population for this survey region? The correct decision is to the null hypothesis that the average age of a survey respondent is equal to 29.8 years because there is evidence at the a = 0.01 level against this claim. Adapted from Raihan M. et al. Examining the relationship between socio-economic status, WASH...
Samantha is studying different species of irises. During her fieldwork, she recorded the length of the...
Samantha is studying different species of irises. During her fieldwork, she recorded the length of the sepal in millimeters of two different species, I. setosa and I. virginica. She wants to know if the two species differ in sepal length or not. Using the software tool you prefer, perform a two-sample t-test for the difference between means to decide whether the two species of irises have different sepal lengths. You may find this list of software manuals helpful in computing...
A Brisbane warehouse buys pre-packed bulk bags of Bundaberg Sugar with an advertised mean weight of...
A Brisbane warehouse buys pre-packed bulk bags of Bundaberg Sugar with an advertised mean weight of 20 kilograms. To determine the validity of the advertised claim, the warehouse manager took a random sample of fifty packets from the latest shipment received and found an average weight of the packets of 20.015 kilograms. Bundaberg Sugar know, from analysing data over many years, that their 20kg bulk bag packing process results in a standard deviation of 55 grams. 1. State the direction...
A researcher knows the average weight of American men between the ages of 30 and 50...
A researcher knows the average weight of American men between the ages of 30 and 50 is 154 pounds. For a random sample of heart patients, body weights are recorded. The data are as follows: 135, 178, 213, 180, 180, 182, 210, 187, 170, 189, 232, 153, 169, 195, 183, 153, 206, 195, 225, 199, and 167. The researcher would like to determine if men who have heart attacks between those ages are heavier than the average 30 to 50-year-old...
The Ohio Department of Education maintains records of average number of years of teaching experience for...
The Ohio Department of Education maintains records of average number of years of teaching experience for each public school in the state. During the 2012-2013 school year, it was reported that the average number of years of teaching experience at Ohio high schools was 14.3 years. Suppose that an intern working in educational policy research wants to determine whether the average number of years of teaching experience of teachers in Ohio high schools changed between the 2012-2013 and 2013-2014 school...
3. In the process of collecting weight and height data from 29 female and 81 male...
3. In the process of collecting weight and height data from 29 female and 81 male students at your uni- versity, you also asked the students for the number of siblings they have. Although it was not quite clear to you initially what you would use that variable for, you construct a new theory that suggests that children who have more siblings come from poorer families and will have to share the food on the table. Although a friend tells...
Suppose the national average dollar amount for an automobile insurance claim is $788.5. You work for...
Suppose the national average dollar amount for an automobile insurance claim is $788.5. You work for an agency in Michigan and you are interested in whether or not the state average is greater than the national average. The hypotheses for this scenario are as follows: Null Hypothesis: μ ≤ 788.5, Alternative Hypothesis: μ > 788.5. You take a random sample of claims and calculate a p-value of 0.0851 based on the data, what is the appropriate conclusion? Conclude at the...
________________ ________________ ______________ 11. Using Excel - Scatter diagrams, estimated regression equations, and trendlines Suppose a...
________________
________________
______________
11. Using Excel - Scatter diagrams, estimated regression equations, and trendlines Suppose a company records data on sales calls, induding the length of each call and whether a sale was made. The manager is interested in determining whether there is a relationship between the average time spent per call and the number of sales made by each employee, so she obtains the average call length and the total number of sales over a 2-week period for a...
Weight (gm) 8.499993 8.499998 8.499996 8.499996 8.499987 8.499987 8.499996 8.500008 8.499...
Weight (gm)
8.499993
8.499998
8.499996
8.499996
8.499987
8.499987
8.499996
8.500008
8.499997
8.499996
Steps 1. Open the Excel workbook almer-jones.xls 2. Type the text Sample mean weight in cell C1 and calculate the sample mean weight in cell C2 3. Type the text Test statistic in cell C4 and calculate the test statistic in cell C5 using the formula y-8.5 o/V10 4. Use the standard normal tables to determine the P-value 5. Hence determine whether the claim that the true weight...
by a cue balls es generates fa alue approach Weight (ounces) Speed 17.6 25.65 19.1 25.42...
by a cue balls es generates fa alue approach Weight (ounces) Speed 17.6 25.65 19.1 25.42 19.1 25.47 19.9 25.35 21.2 25.51 19.1 25.49 18.9 25.27 19.1 25.42 18.9 25.49 18.5 25.37 19.8 25.43 18.9 25.23 17.9 25.24 18.7 25.14 18.9 25.14 18.9 25.09 19.1 25.13 20.1 24.98 19.3 25.07 19.4 24.91 18.7 24.94 19.9 24.84 19.5 25.02 18.6 24.86 18.6 24.88 18.8 24.78 19.9 24.86 19.2 24.74 19.4 24.83 189 24 71 cue an 18.9 18.5 19.2 19.2 18.9...
z-critical value: Based on your z-statistic and z-critical values, what can you conclude abot the researchers' claim that survey respondents, on average, are older than the general Bangladesh population for this survey region? The correct decision is to the null hypothesis that the average age of a survey respondent is equal to 29.8 years because there is evidence at the a = 0.01 level against this claim. Adapted from Raihan M. et al. Examining the relationship between socio-economic status, WASH...
The Ohio Department of Education maintains records of average number of years of teaching experience for each public school in the state. During the 2012-2013 school year, it was reported that the average number of years of teaching experience at Ohio high schools was 14.3 years. Suppose that an intern working in educational policy research wants to determine whether the average number of years of teaching experience of teachers in Ohio high schools changed between the 2012-2013 and 2013-2014 school...
3. In the process of collecting weight and height data from 29 female and 81 male students at your uni- versity, you also asked the students for the number of siblings they have. Although it was not quite clear to you initially what you would use that variable for, you construct a new theory that suggests that children who have more siblings come from poorer families and will have to share the food on the table. Although a friend tells...
________________
________________
______________
11. Using Excel - Scatter diagrams, estimated regression equations, and trendlines Suppose a company records data on sales calls, induding the length of each call and whether a sale was made. The manager is interested in determining whether there is a relationship between the average time spent per call and the number of sales made by each employee, so she obtains the average call length and the total number of sales over a 2-week period for a...
Weight (gm)
8.499993
8.499998
8.499996
8.499996
8.499987
8.499987
8.499996
8.500008
8.499997
8.499996
Steps 1. Open the Excel workbook almer-jones.xls 2. Type the text Sample mean weight in cell C1 and calculate the sample mean weight in cell C2 3. Type the text Test statistic in cell C4 and calculate the test statistic in cell C5 using the formula y-8.5 o/V10 4. Use the standard normal tables to determine the P-value 5. Hence determine whether the claim that the true weight...
by a cue balls es generates fa alue approach Weight (ounces) Speed 17.6 25.65 19.1 25.42 19.1 25.47 19.9 25.35 21.2 25.51 19.1 25.49 18.9 25.27 19.1 25.42 18.9 25.49 18.5 25.37 19.8 25.43 18.9 25.23 17.9 25.24 18.7 25.14 18.9 25.14 18.9 25.09 19.1 25.13 20.1 24.98 19.3 25.07 19.4 24.91 18.7 24.94 19.9 24.84 19.5 25.02 18.6 24.86 18.6 24.88 18.8 24.78 19.9 24.86 19.2 24.74 19.4 24.83 189 24 71 cue an 18.9 18.5 19.2 19.2 18.9...
Most questions answered within 3 hours.
-
Design a class Holiday that represents a
holiday during the year. This class has three
private...
asked 13 minutes ago -
Problem 1 (Logistic Regression and KNN). In this problem, we
predict Direction using the data Weekly.csv....
asked 10 minutes ago -
What is the difference between VNTRs (Variable Number Tandem
Repeats) and STRs (Short Tandem Repeats) used...
asked 17 minutes ago -
Fill in
Isotope: 15 O
1. Element name:
2. Atomic number:
3. Mass number:
4. Number...
asked 17 minutes ago -
These days with the cost of a college education it is important
to be able to...
asked 25 minutes ago -
c++
Implement Radix Sort Most sorting algorithms, like bubble,
insertion, selection and shell follow similar implementations....
asked 32 minutes ago -
Many adult tissues contain terminally differentiated cells that
are incapable of proliferation. How can these tissues...
asked 33 minutes ago -
A survey of tobacco use in high schools tested the saliva of
female and male students...
asked 53 minutes ago -
Assume that the mutation rate for a given gene is
510-6 mutations per gene per generation....
asked 52 minutes ago -
The majority of innovation organizational communication has
been driven by technological advancements in the past thirty...
asked 53 minutes ago -
If one motor has three times as much power as another, then the
smaller power motor:...
asked 51 minutes ago -
Discuss at least four issues that are important to
accountants.
I need 2 pages of explanations
asked 52 minutes ago