2.38 Cheek teeth of extinct primates. Refer to the American D Journal of Physical Anthropology (Vol. 142, 2010) study MOLARS of the characteristics of cheek teeth (e.g., molars) in an extinct primate species, Exercise 2.9 (p. 38). In addition to degree of wear, the researchers recorded the dentary depth of molars (in millimeters) for 18 cheek teeth ex- tracted from skulls. These depth measurements are listed in the accompanying table. Summarize the data graphically with a stem-and-leaf display. Is there a particular molar depth that occurs more frequently in the sample? Data on Dentary Depth (mm) of Molars 18.12 16.55 19.48 15.70 19.36 17.83 15.94 13.25 15.83 16.12 19.70 18.13 15.76 14.02 17.00 14.04 13.96 16.20 Based on Boyer, D. M., Evans, A. R., and Jernvall, J. "Evidence of dietary differentiation among late Paleocene-early Eocene Plesiadapids (Mammalia, primates)." American Journal of Physical Anthropology, Vol. 142, 2010 (Table A3).

What is the IQR for the following box-and-whisker data: Min = 154, LQ = 180, Med = 197.5, UQ = 211, Max = 265 O a. 26 O b. 43.5 O c. 111 O d. 31

1) null and alternative hypothesis 2) observed value 3) p-value

please answer the question - answer is not

The level of dissolved oxygen in a river indicates the water’s ability to support aquatic life. A research project is started to determine if the oxygen levels in the river have changed. A study done 10 years prior, showed that the mean oxygen levels in milligrams per liter for the river was 4.3. A.) Write appropriate hypotheses for this test B.) Water is collected samples from 15 randomly chosen locations along the river and measured the dissolved oxygen. Construct and interpret a 95% confidence interval for the mean dissolved oxygen level for this stream. The results are in milligrams per liter:  4.53 5.5 4.01 5.04 4.83 4.66 3.29 4.4 2.87 5.23 5.42 5.73 4.13 6.38 5.55 C.) Based on the sample from part B, conduct a significance test of these results using a 5% significance level. Give complete results of the test including a p-value and what the results means.

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To determine if there is a relationship between grade performance and extracurricular participation, North Carolina State conducted a study of 112 students, recording the number of students in each of three extracurricular categories and each of two grade categories. Here are the results: Low extra-curricular participation Moderate extra-curricular participation High extra-curricular participation Good grades 11 68 3 Poor grades 2 23 A. The conditions that allow us to safely use the chi-squared procedure are met. 5 Source: Felder, et al., "A Study of Student Performance in an Introductory Chemical Engineering Course," 1992 ASEE Annual Conference Proceedings, pp. 1516-1519. The expected count of students with high extracurricular participation and good grades is the number of students that you would expect to see assuming that which of the following is correct? Check all that apply. B. Extracurricular participation and grade performance are related. C. Extracurricular participation and…

The Wind Mountain excavation site in New Mexico is an important archaeological location of the ancient Native American Anasazi culture. The following data represent depths (in cm) below surface grade at which significant artifacts were discovered at this site (Reference: A.I. Woosley and A.J. McIntyre, Mimbres Mogollon Archaeology, University of New Mexico Press).87, 47, 77, 62, 92, 92, 117, 32, 57, 60, 80, 122, 82, 67, 67, 142, 67, 52, 32, 127, 77, 139, 82, 122, 17, 47, 72, 67, 52, 47, 97, 72, 72, 30, 42, 127, 107, 77, 82, 72, 92, 70, 75, 77, 57, 72, 97, 67, 202, 77, 17, 92, 48, 35, 102, 67, 62, 57, 87, 52, 12, 70, 101, 147, 47, 77, 47, 97, 87, 67, 67, 54, 84Construct the Class Frequency Distribution Table for the data above with 10 classes.

A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately mile from the school. Assume that it is reasonable to regard the teen drivers in this 2 study as representative of the population of teen drivers. Amount by Which Speed Limit Was Exceeded Female Driver -0.1 0.4 1.1 0.7 1.1 1.2 0.1 0.9 0.5 0.5 (a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use males-females. Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to three decimal places.) t = df = P= Male Driver 1.4 1.2 0.9 2.1 0.7 1.3 3 1.3 0.6 2.1 (b) Do…

Compute the standard scores for the values 0.49, 0.18,and 0.90. Interpret these scores. What conclusions can you make about these data values based on their standard scores