A Gallup poll surveyed 1018 adults by telephone, and $22 \%$ of them reported that they smoked cigarettes within the past week.

The following doctors were observed on staff at a local hospital.

Choose one doctor at random; what is the probability that a. She is a pathologist? b. He is an orthopedist or an MD?

An interval estimate is a range of values used to estimate

1. a population parameter
2. a population statistic
3. a sample parameter
4. a sample statistic

A single value used to estimate a population parameter is called a ______.

Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Unless specified by your instructor, use either the traditional method or P-value method for testing hypotheses. A New York Times article noted that the mean life span for 35 male symphony conductors was 73.4 years, in contrast to the mean of 69.5 years for males in the general population. Assuming that the 35 males have life spans with a standard deviation of 8.7 years, use a 0.05 significance level to test the claim that male symphony conductors have a mean life span that is greater than 69.5 years. Does it appear that male symphony conductors live longer than males from the general population? Why doesn't the experience of being a male symphony conductor cause men to live longer?

State the effect on the rate of reaction for the following.

increase the concentration of a reactant

The given expression is part of a calculation employed to study the relationship between the colors of motorcycle helmets and injuries. Round the result to four decimal places.

$$\frac{(491-513.174)^2}{513.174}$$

The computer giant IBM has 329,373 employees and 637,133 stockholders. A vice president plans to conduct a survey to study the number of shares held by individual stockholders.

e. What is wrong with gauging stockholder views about employee benefits by mailing a questionnaire that IBM stockholders could complete and mail back?

The computer giant IBM has 329,373 employees and 637,133 stockholders. A vice president plans to conduct a survey to study the number of shares held by individual stockholders.

d. If a sample of 1000 stockholders is obtained, and the average (mean) number of shares is calculated for this sample, is the result a statistic or a parameter?

The computer giant IBM has 329,373 employees and 637,133 stockholders. A vice president plans to conduct a survey to study the number of shares held by individual stockholders.

c. If the survey is conducted by telephoning 20 randomly selected stockholders in each of the 50 United States, what type of sampling (random, systematic, convenience, stratified, cluster) is being used?

The computer giant IBM has 329,373 employees and 637,133 stockholders. A vice president plans to conduct a survey to study the number of shares held by individual stockholders.

b. Identify the level of measurement (nominal, ordinal, interval, ratio) for the number of shares held by stockholders.

The computer giant IBM has 329,373 employees and 637,133 stockholders. A vice president plans to conduct a survey to study the number of shares held by individual stockholders.

a. Are the numbers of shares held by stockholders discrete or continuous?

Determine whether the given description corresponds to an observational study or an experiment. Nine-year-old Emily Rosa became an author of an article in the Journal of the American Medical Association after she tested professional touch therapists. Using a cardboard partition, she held her hand above the therapist's hand, and the therapist was asked to identify the hand that Emily chose.

The given expression is used to determine the size of the sample necessary to estimate the proportion of adults who have cell phones.

$$\left[\frac{1.96 \cdot 0.25}{0.01}\right]^2$$