In the study of the Weight Watchers weight loss program from the mentioned exercise, subjects were found using the method described as follows: "We recruited study candidates from the Greater Boston area using newspaper advertisements and television publicity." Is the sample a voluntary response sample? Why or why not?

In a study of the Weight Watchers weight loss program, 40 subjects lost a mean of $3.0 \mathrm{lb}$ after 12 months (based on data from "Comparison of the Atkins, Ornish, Weight Watchers, and Zone Diets for Weight Loss and Heart Disease Risk Reduction," by Dansinger et al., Journal of the American Medical Association, Vol. 293, No. 1). Methods of statistics can be used to verify that the diet is effective. Does the Weight Watchers weight loss program have statistical significance? Does it have practical significance? Why or why not?

In a test of the Atkins, Zone, Weight Watchers, and Ornish weight loss programs, 160 subjects followed the diet programs, with 40 subjects using each diet. They were weighed one year after being on the diet, and the ANOVA results from Excel are given below. Use a 0.05 significance level to test the claim that the mean weight loss is the same for the diets. Given that the mean amounts of weight loss after one year are -2.1 lb, -3.2 lb, -3.0 lb, and - 3.3 lb for the four diets, do the diets appear to be effective?

$$\begin{matrix} \text{ANOVA}\\ \text{Source of Variation} & \text{SS} & \text{df} & \text{MS} & \text{F} & \text{P-value} & \text{F crit}\\ \text{Between Groups} & \text{35.99984} & \text{3} & \text{11.99995} & \text{0.35206} & \text{0.787709} & \text{2.662569}\\ \text{Within Groups} & \text{5317.256} & \text{156} & \text{34.08497}\\ \text{Total} & \text{5353.256} & \text{159}\\ \end{matrix}$$

Determine whether the results appear to have statistical significance, and also determine whether the results appear to have practical significance.

In a study of the Ornish weight loss program, 40 subjects lost a mean of 3.3 lb after 12 months (based on data from “Comparison of the Atkins, Ornish, Weight Watchers, and Zone Diets for Weight Loss and Heart Disease Risk Reduction,” by Dansinger et al., Journal of the American Medical Association, Vol. 293, No. 1). Methods of statistics can be used to show that if this diet had no effect, the likelihood of getting these results is roughly 3 chances in 1000.

The amount spent (in billions of dollars) for ads online is shown. (The numbers for 2016 through 2019 are projected numbers.) Draw a time series graph and comment on the trend.

You have collected a large sample of values. Why is it necessary to understand the context of the data?

As you solve these problems, clearly show all of your work. Also show the connection between the parts of the word problem and the parts of your math problem. Be sure to explain what your answer represents in the story.

a. Tinaya worked 42.2 hours last week. If she is paid $\$15.65$ an hour, what was her total pay (before taxes) for the week?

b. Joe has a medicine bottle with $6 \frac { 2 } { 3 }$ oz of liquid medicine in it. If each dose is $\frac { 1 } { 4 }$ oz, how many doses does Joe have if he will use all the medicine?

c. If the temperature changes -2.6 degrees each hour for 8.2 hours, how much does the total temperature change?

d. Jack and some friends climbed Long's Peak in Rocky Mountain National Park. Then he and his friends started down the mountain, losing $1515 \frac { 1 } { 4 }$ feet of elevation each hour. They hiked for $6 \frac { 1 } { 5 }$ hours to get back down to the parking lot. How many feet of elevation did they lose?

e. Mr. Solomon, the art teacher, has 49.6 pounds of clay. If he gives every student 1.6 pounds of clay and has none left, how many students are in his class?

Find the personal pronouns that have antecedents within each sentence or sentence group. Draw one line under the personal pronoun. Draw two lines under its antecedent. Change the personal pronoun to agree in person with its antecedent. Correct the verb if necessary./ Jianming will be the first person in her family to go to college, where you plans to study medicine.

Benefits from biodiversity include (a) medicines (b) useful products $(c)$ water purification (d) all of the above.

Identify the (a) sample and (b) population. Also, determine whether the sample is likely to be representative of the population. Nielsen Media Research surveys 5000 randomly selected households and finds that among the TV sets in use, 19% are tuned to 60 Minutes.

Identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster. During the last presidential election, CNN conducted an exit poll in which specific polling stations were randomly selected and all voters were surveyed as they left the premises.

Identify whether the given value is a statistic or a parameter.The average (mean) atomic weight of all elements in the periodic table is 134.355 unified atomic mass units.

Which is NOT a good source of information about the hazards that affect waste disposal in a chemistry lab? Select one:

(a) The chemical Safety Data Sheets

(b) Your instructor’s directions

(c) Your lab partner

(d) The chemical bottle labels

Explain the difference between statistical significance and practical significance.