In conjunction with the housing foreclosure crisis of 2009, many economists expressed increasing concern about the level of credit card debt and efforts of banks to raise interest rates on these cards. The banks claimed the increases were justified. A Senate subcommittee decided to determine if the average credit card balance depends on the type of credit card used. Under consideration are Visa, MasterCard, Discover, and American Express. The sample sizes to be used for each level are 25, 25, 26, and 23, respectively. State the number of degrees of freedom available for determining the between-samples variation.

Trott and colleagues (2020) did a study to investigate if there was any association between eating disorder and exercise addiction. Study participants were recruited via an international group fitness e-newsletter and through Facebook, Instagram, Twitter through social media influencers from 8 April 2020 to 31 July 2020. What is the sampling method used in this study? 1.Convenience sampling 2.Quota sampling 3.Authoritative sampling 4.Snowball sampling

For quality assurance, every fifth package on an assembly line is selected and tested for durability. Part a: Is the survey method likely to result in a representative sample? Part b: If not, suggest a better survey method.

You may need to use the appropriate appendix table or technology to answer this question. In the past, 19% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An independent research firm has been charged with conducting a sample survey to obtain more current information. (a) What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.03? Use a 95% confidence level. (Round your answer up to the nearest whole number.) (b) Repeat part (a) using a 99% confidence level. (Round your answer up to the nearest whole number.) Need Help? Read It option esc ! 1 T Q A Z 96 2 W S X 88 command Watch It O #3 E Master It a D C $ 4 R F ~ ♫ % 5 V T G m MA 6 MacBook Pro B Y H & 7 U N D W * 8 J P 1 T M ( K 1 & O **** ) O 1 H L cricut P V command T { x + 11 ? option } រ dele

A. In each of the following situations, a random sample must be obtained. Determine whether a cluster, stratified, or systematic random sampling would be appropriate. Explain in detail how the sampling is to be conducted. Do not discuss expected results or conclusions. A large convenience store chain wishes to determine its customers’ level of satisfaction with regard to their service. A nationwide survey on charter change is to be conducted. (Note: there are seventeen regions in the Philippines.) An educational researcher wants to compare the difference in career goals between male and female students of Otto Hahn University who has 10,000students. A social researcher wants to determine whether electronic engineers who work in the communications field earn more than those who are in the semiconductor industry. A market analyst would like to compare the durability, in terms of mean time before wear, of two leading brands of car tires. B. The numbers of incorrect answers on a true or…

The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other cities of similar size to determine the relationship between the number of police and the number of crimes reported. The chief gathered the following sample information.   City Police   Number of Crimes   City   Police   Number of Crimes Oxford   13       13       Holgate       14       5   Starksville   14       12       Carey       11       16   Danville   20       5       Whistler       9       20   Athens   23       7       Woodville       18       6          Click here for the Excel Data Filea. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 4 decimal places.)   b. Estimate the number of crimes for a city with 24 police officers. (Round your answer to the nearest whole number.)   c. Interpret the regression…

Sierra College students enrolled in an online Elementary Statistics course were asked to participate in an anonymous onlne survey. The survey asked the students "Which type of device will you primarily use to access your online course in Canvas?". Of the 152 students who answered this question, 20 responded "a desktop computer", 121 responded "a laptop computer", 6 responded "a smartphone", and 5 responded "a tablet". The Sierra College Mathematics Department believes that less than 5% of students enrolled in an online Elementary Statistics course primarily uses a smartphone to access their online course in Canvas. Use the data collected in the survey to conduct a hypothesis testing procedure to test this belief. What conclusion should be reached according to the results of this hypothesis test?

The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other cities of similar size to determine the relationship between the number of police and the number of crimes reported. The chief gathered the following sample information.   City Police Number of Crimes City Police Number of Crimes Oxford 15 19 Holgate 17 10 Starksville 17 16 Carey 11 23 Danville 25 8 Whistler 9 27 Athens 28 10 Woodville 21 10   Click here for the Excel Data Filea. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 4 decimal places.)   b. Estimate the number of crimes for a city with 20 police officers. (Round your answer to the nearest whole number.)

A pool of 500 Houston residents indicated that 16% of them participated in Women’s March on January 21, 2017. We are interested in figuring out the actual percentage of Houston residents that participated in Women’s March. Please answer the following questions.   1.How large is the population size N? Hint: Provide your best guess. 30,000 80,000 500 600,000 50,000   2. How large is the sample size n? 500 500 × 16% 16 N × 16% (where N is population size)   3. How many possible samples of size 500 can be taken from the population? Hint: Provide your best guess. N (N is population size) More than N (N is population size) 500 choose 16 500

In which one of the following sampling techniques, the samples are selected based on the proportion of the categories? a. Stratified sampling b. Cluster sampling c. Systematic sampling d. Random Sampling