Bill contends that people spend between 0 and 80 minutes each day listening to music, and he insists that no range of times is any more likely than any other. Jane argues that it doesn’t make sense to believe that because people are just as likely to spend more than two hours listening to music as they are to spend between 30 and fifty minutes and proposes a normal distribution instead. According to Jane's conjecture, what would be the 95th percentile of the amount of time that people spend listening to music in a day?

Suppose that a polling company surveyed 600 people about how much time they spend watching television each day. The results of this survey were compiled and used to create this relative frequency histogram.   Assume that all percentages shown in the histogram are whole numbers. Each of the bars in this histogram includes only the left endpoint of the class except for the last bar, which also includes the right endpoint. What percentage of respondents said that they watch television at least six hours per day? How many respondents said that they watch television between three and five hours per day?

Now assume it is true that 60.98% of all words in the English language contain the letter "e" (as given in the source above).  Generate a simulated distribution of 1000 sample statistics for simulated samples of 20 words from the English language.  In the space below, include a copy-and-paste of your simulated distribution.  You need to be using the "Proportion of Successes" option, and that is the picture you need to copy and paste. Your picture needs to show all the values that you entered in the applet.     (h)  If we used this simulated distribution of sample statistics and the 2SD rule to find the "cutoffs" for "usual" vs." unusual" sample statistics, then what would those cutoff values be?  Find the values, and show all your work.     (i)  Which of the following conclusions does your observed sample statistic support? It is plausible that 60.98% of words in the English language contain the letter "e"? OR We have statistically significant evidence that the percentage of words in…

Which of the following statements regarding Z scores is FALSE? a. It indicates whether the raw score is above or below average. b. It indicates whether or not a distribution is skewed. c. It indicates the percentage of cases between that score and the mean d. It is sometimes referred to as a standard score

The following frequency table represents the number of times an individual visits their Primary Care Physician during one year for 50 individuals on a specific health care plan. What is the 50th percentile of the data? 1 1. 1 1 1 1 2 3. 5. 9. 17 8. 8. 8. 8. 8. 8 8. 10 12 12 14 14 15 15 15 Provide your ânswer below: doctor visits 6. 8. 8. 3. 4) 6. 2. 4. 6. 7. 4. 6. 8. 9. 3. 5. 6. 9.

The popularity of computer, video, online, and virtual reality games has raised concerns about their ability to negatively impact youth. The data in this exercise are based on a recent survey of 14- to 18-year-olds in Connecticut high schools. Here are the grade distributions of boys who have and have not played video games.   Grade average   A's and B's C's D's and F's Played games 735 449 194 Never played games 205 145 79 The null hypothesis "no relationship" says that in the population of all 14- to 18- year-old boys in Connecticut, the proportions who have each grade average are the same for those who play and don't play video games. (a) Find the expected cell counts if this hypothesis is true, and display them in a two-way table. Check that the row and column totals agree with the totals for the observed counts. (Round your answers to two decimal places.)   A's and B's C's D's and F's Played games       Never played games

A researcher asks a sample of people about their attitudes toward marijuana legalization and concludes people have a wide variety of opinions, and are equally likely to be anywhere between strongly in favor of it to strongly opposed to it. She reaches this conclusion because the shape of the distribution is

Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saturday, the oil change facility will perform 40 oil changes between 10 AM and 12PM. Treating this as a random sample, there would be a 10% chance of the mean oil change time being at or below what value.

A researcher selects a sample of 6 men and 11 women. She asks participants to rate the likelihood they would do female-stereotyped jobs (such as nursing or school teaching) on a scale from 1 = not likely at all to 5 = very likely. Men indicated that they would be less likely to do these jobs (M = 2.1) compared with women (M = 4.3). What is the weighted mean for the combined sample of 17 total participants? O O 2.1 4.3 3.2 3.5

the next 3 questions concern the results of a survey of 18,000 adults between 20 and 64 years of age. Respondents were asked to indicate whether they would endorse a public health initiative. After data were collected, the distribution of the probability of endorsing the initiative was assessed.The distribution was judged to be roughly positively skewed Four potential plots of these data are presented below (only one is correct):9.   If the survey included all adults aged 18+, one more category would be inserted at the low end of the age range. What would it be? d. 18-20c. 18-19b. 15-20a. 15-19