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

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?

Distribute

$$(4g+3h)(2g+3h)$$

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.

The ___ contains blood vessels from the embryo that link the embryo and the placenta.

What is the function of the placenta?

Which type of diabetes is due to a deficiency in the secretion of antidiuretic hormones?

Imagine selecting a U.S. high school student at random. Define the random variable X= number of languages spoken by the student. The table gives the probability distribution of X.

$$\begin{array}{|l|c|c|c|c|c|} \hline \text { Languages } & 1 & 2 & 3 & 4 & 5 \\ \hline \text { Probability } & 0.630 & 0.295 & 0.065 & 0.008 & 0.002 \\ \hline \end{array}$$

Explain in words what $P(X \geq 3)$ means. What is this probability?

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?

Perform a correlation test for normality, using either the critical-value approach or the P-value approach. The following table displays finishing times, in seconds, for the winners of fourteen 1-mile thoroughbred horse races, as found in two recent issues of Thoroughbred Times.

$$\begin{array}{lllllll} \hline 94.15 & 93.37 & 103.02 & 95.57 & 97.73 & 101.09 & 99.38 \\ 97.19 & 96.63 & 101.05 & 97.91 & 98.44 & 97.47 & 95.10 \\ \hline \end{array}$$

Do the data provide sufficient evidence to conclude that the finishing times for the winners of 1-mile thoroughbred horse races are not normally distributed? Use $\alpha=0.10$.

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?

Give an example of a unicellular exocrine gland. What does it secrete?

The mean weight of loaves of bread produced at the bakery where you work is supposed to be 1 pound. You are the supervisor of quality control at the bakery, and you are concerned that employees are making loaves that are too light. Suppose you weigh an SRS of 50 bread loaves and find that the mean weight is 0.975 pound. What conclusion would you make?