A telecommunications company provided its cable TV subscribers with free access to a new channel for a month. It then chose a sample of 550viewers and asked them whether they would be willing to pay an extra $10 per month to continue access to the channel. A total of 35 replied that they would be willing to pay. The marketing director of the company claims that more than 7% of all its subscribers would be willing to pay. Can you conclude that the director's claim is true? Use the 1 percent level of significance.

To determine if patrons are satisfied with performance​ quality, a theater surveys patrons at an evening performance by placing a paper survey inside their programs. All patrons receive a program as they enter the theater. Completed surveys are placed in boxes at the theater exits. On the evening of the​ survey, 500 patrons saw the performance. One hundred surveys were​ completed, and​ 70% of these surveys indicated dissatisfaction with the performance. Should the theater conclude that patrons were dissatisfied with performance​ quality? Explain.

Residents in a city are charged for water usage every three months. The water bill is computed from a common fee, along with the amount of water the customers use. The last water bills for 40 residents from two different neighborhoods are shown in the histograms below.   Which of the following is a true statement comparing the water bills of the two neighborhoods? More homes on Front Street had water bills above $225 than on Pine Road. More homes on Pine Road had water bills under $150 than on Front Street. More homes on Pine Road had water bills above $200 than on Front Street. The same number of homes on both streets had water bills between $175 and $200.

Find another classmate’s initial post and write down the margin of error that they calculated. You will use that value in another context. As another election cycle begins this fall, you will likely hear newscasters state poll data and then mention the margin of error. For example: "Polls show that among likely voters in the Make-Believetown Governor’s race, Bad Wolf is currently leading with 43% of expected votes, Little Pig has 41%, and 16% are undecided. The poll has a margin of error of 4%.” Instead of the 4% margin of error currently in the example, use the margin of error from your classmate as the new margin of error% for the poll. Write a brief paragraph explaining who you believe will be the next imaginary governor of Make Believetown and why. Use the information you know about the margin of error to make your case. My new margin of error for classmates is 10.08408.

The preeminent basketball philosopher Rasheed Wallace popularized the phrase, "Ball don't Lie." This phrase means that if a foul was called incorrectly, the free-throw shooter is more likely to miss their shots. (We can think of this as a sort of Basketball Karma.) Due to the recent "Last Two Minute Report," we now have some data to test this claim. Of the 177 free throws awarded incorrectly, the shooter made 78.5%. Use this information to test the claim, with a .05 level of significance, that the percentage of made free throws after an incorrect foul call is less than 80%, which is the FT Percentage for an average NBA player. Round your answers to three decimal places or to the nearest tenth of a percent. (e.g. .021 or 2.1%) For credit, the hypothesis test must contain: 1) Claim in terms of the appropriate parameter (e.g. LaTeX: \mu=\:4.5\:miles) 2) Null and alternative hypothesis 3) Sample evidence used 4) Test stat (z or t) , p-value and direction of test. (right, left or…

Several years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 62% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is. (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…

A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant. Historical records show that 6% of the employees suffered lost-time accidents last year. Management believes that a special safety program will reduce such accidents to 4% during the current year. In addition, it estimates that 15% of employees who had lost-time accidents last year will experience a lost-time accident during the current year. a. What percentage of the employees will experience lost-time accidents in both years (to 2 decimals)? % b. What percentage of the employees will suffer at least one lost-time accident over the two-year period (to 2 decimals)? %

The question is in the image

At a single high-end restaurant in England over a 3-week period, there were 141 tables of diners. During the first week, current pop music was played. During the second week, classical music was played. During the third week, no music was played. The results of spending patterns were as follows: Music Mean bill n Classical 24.130 44 2.243 Pop 21.912 49 2.627 None 21.697 48 3.332 Total 22.531 141 2.969 a) By considering the standard deviations, explain why it is appropriate to perform a one-way ANOVA test on this data. b) State the null and alternate hypothesis. c) Perform a one-way ANOVA test by hand. d) Perform a TK Multiple Comparisons Test to determine which means are different with 95% confidence and report your result.

In a survey, 1000 adults were asked whether they favored an increase in the state income tax if the additional revenues went to education. In addition it was noted whether the person lived in a city, suburb, or rural part of the state. Do the results indicate that the place of residence and the opinion about tax increase are independent?