In the article “Assessing Friendship Motivation During Preadolescence and Early Adolescence”, J. Richard and B. Schneider described the properties of the Friendship Motivation Scale for Children (FMSC), a scale designed to assess children’s desire for friendships. Two interesting conclusions are that friends generally report similar levels of the FMSC and girls tend to score higher on the FMSC than boys. Boys in the seventh grade scored a mean of 9.32 with a standard deviation of 1.71, and girls in the seventh grade scored a mean of 10.04 with a standard deviation of 1.83. Assuming that FMSC scores are normally distributed, determine the percentage of seventh-grade boys who have FMSC scores within a. one standard deviation to either side of the mean. b. two standard deviations to either side of the mean. c. three standard deviations to either side of the mean. d. Repeat parts (a)-(c) for seventh-grade girls.

If two events A and B are independent, how do the probabilities P(A) and P(A | B) compare?

A drawer contains 6 red socks, 4 green socks, and 2 black socks. Two socks are chosen at random. What is the probability that they match?

Determine the following for a q-curve with parameters $\kappa=8$ and v=20. a. The q-value having area 0.01 to its right b. $q _{0.05}$

What gland is the only one that stores its hormones for later use?

Match the term in column B with its related term in column A. HCl

In the third week of July, a random sample of 40 farming regions gave a sample mean of $\bar{x}=\$ 6.88$ per 100 pounds of watermelon. Assume that $\sigma$ is known to be $1.92 per 100 pounds. Find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for their watermelon crop. What is the margin of error?

Modern medical practice tells us not to encourage babies to become too fat. Is there a positive correlation between the weight x of a 1-year-old baby and the weighty of the mature adult (30 years old)? A random sample of medical files produced the following information for 14 females:

$$\scriptstyle\begin{matrix} \text{x (lb)} & \text{21} & \text{25} & \text{23} & \text{24} & \text{20} & \text{15} & \text{25} & \text{21} & \text{17} & \text{24} & \text{26} & \text{22} & \text{18} & \text{19}\\ \text{y (lb)} & \text{125} & \text{125} & \text{120} & \text{125} & \text{130} & \text{120} & \text{145} & \text{130} & \text{130} & \text{130} & \text{130} & \text{140} & \text{110} & \text{115}\\ \end{matrix}$$

$\Sigma x=300$; $\Sigma y=1775$; $\Sigma x^{2}=6572$; $\Sigma y^{2}=226,125$; $\Sigma x y=38,220$ Test the claim that the population correlation coefficient $\boldsymbol{\rho}$ is positive at the 1% level of significance.

DNA molecules consist of chemically linked sequences of the bases adenine, guanine, cytosine, and thymine, denoted A, G, C, and T. A sequence of three bases is called a codon. A base may appear more than once in a codon. a. How many different codons are there? b. The bases A and G are purines, while C and T are pyrimidines. How many codons are there whose first and third bases are purines and whose second base is a pyrimidine? c. How many codons consist of three different bases?

The four organs from which fluid output occurs are the _____, _____, _____, and _____.

Previous studies have shown that urban bus drivers have an extremely stressful job, and a large proportion of drivers retire prematurely with disabilities due to occupational stress. These stresses come from a combination of physical and social sources such as traffic congestion, incessant time pressure, and unruly passengers. In the paper, “Hassles on the Job: A Study of a Job Intervention With Urban Bus Drivers” (Journal of Organizational Behavior, Vol. 20, pp. 199-208), G. Evans et al. examined the effects of an intervention program to improve the conditions of urban bus drivers. Among other variables, the researchers monitored diastolic blood pressure of bus drivers in downtown Stockholm, Sweden. The data, in millimeters of mercury (mm Hg), on the WeissStats CD are based on the blood pressures obtained prior to intervention for the 41 bus drivers in the study. Use the technology of your choice to do the following. a. Obtain a normal probability plot, boxplot, histogram, and stem-and-leaf diagram of the data. b. Based on your results from part (a), can you reasonably apply the one-mean t-test to the data? Explain your reasoning. c. At the 10% significance level, do the data provide sufficient evidence to conclude that the mean diastolic blood pressure of bus drivers in Stockholm exceeds the normal diastolic blood pressure of 80 mm Hg?

The outcome of chance events in a fantasy role-playing game is determined by rolling polyhedral dice with anywhere from 4 to 20 sides. Suppose you roll a 16 -sided die 5 times and observe the number on the top of the die. How many possible outcomes are there for these 5 rolls?

Indicate which of the following are valid statistical questions. Explain your reasoning. How many people visited Acadia National Park last Tuesday?

Why is surgery an effective treatment for only half of the persons diagnosed with lung cancer?