What is the chance of a panellist guessing the target sample using the 5-AFC method? 0.25 1/5 O 4/5 O 1/4
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- You work for a marketing firm that has a large client in the automobile industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been assigned to gather a random sample that could be used to estimate this proportion to within a 0.035 margin of error at a 99% level of confidence. a) With no prior research, what sample size should you gather in order to obtain a 0.035 margin of error? Round your answer up to the nearest whole number. n = households b) Your firm has decided that your plan is too expensive, and they wish to reduce the sample size required. You conduct a small preliminary sample, and you obtain a sample proportion of ˆp=0.225p^=0.225 . Using this new information. what sample size should you gather in order to obtain a 0.035 margin of error? Round your answer up to the nearest whole number. n = householdsIn a survey, 33% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so she randomly selected 210 pet owners and discovered that 66 of them spoke to their pet on the telephone. Does the veterinarian have a right to be skeptical? Use the a=0.01 level of significance. Because npo (1-Po) = 10, the sample size is (Round to one decimal place as needed.) What are the null and alternative hypotheses? Ho versus H₁ (Type integers or decimals. Do not round.) Find the test statistic, Zo Zo= (Round to two decimal places as needed.) Find the P-value. 5% of the population size, and the sample the requirements for testing the hypothesis P-value= (Round to three decimal places as needed.) Does the veterinarian have a right to be skeptical? OA. The veterinarian has a right to be skeptical. There is sufficient evidence to conclude that the true proportion of pet owners who talk to their pets on the telephone is less than 33%. OB.…Rufus Scrimgeour is interested in the rate of raids on Ministry of Magic regional offices. To do so he randomly selects 5 offices from a list of all offices and collects the number of raids in the past 30 days. What sampling method did Rufus employ? Question 3 options: Systematic Simple Random Stratified
- The state would like to evaluate the usefulness of a program to randomly test high school athletes for steroid use. Initially, a state agency will test athletes in all 20 schools in Fort Worth, randomly selecting 3 athletes from each school. What type of sampling is being employed in this example? convenience sampling cluster sampling simple random sampling stratified samplingYou work for a marketing firm that has a large client in the automobile industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been assigned to gather a random sample that could be used to estimate this proportion to within a 0.035 margin of error at a 99% level of confidence. a) With no prior research, what sample size should you gather in order to obtain a 0.035 margin of error? b) Your firm has decided that your plan is too expensive, and they wish to reduce the sample size required. You conduct a small preliminary sample, and you obtain a sample proportion of ˆp=0.185. Using this new information. what sample size should you gather in order to obtain a 0.035 margin of errorWhen determining the sample size, the margin of error is double the same as not related half of OO interval width.
- A certain mall in the city has a population of 10,000 employees distributed in three different branches. If you would like to determine the sample size, what technique can be applied?A normal six-sided die is thrown once. The number of outcomes in the sample space isYou intend to conduct an ANOVA with 4 groups in which each group will have the same number of sujbects: n = 17. (This is referred to as a "balanced" single-factor ANOVA.) What are the degrees of freedom for the numerator? d.f.(treatment): What are the degrees of freedom for the denominator? d.f.(error) =