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GIRL SCOUT COOKIES
You are contacted by the top cookie-selling Girl Scout troop in the city. As part of their sales plan for next year’s cookie selling season, they need to know (with 90% confidence) if the types of cookies purchased by their customers depends on where the scouts sell them. Here is their confidential sales data from last year:
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Type of Cookie Sold |
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Thin Mints |
Tagalongs |
Do-si-dos |
Trefoils |
Samoas |
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Sales Method |
At parents’ workplace |
472 |
641 |
350 |
223 |
401 |
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Door-to-Door |
840 |
1092 |
673 |
511 |
542 |
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Community |
683 |
742 |
491 |
420 |
374 |
What type of hypothesis test is required here? Verify all assumptions required for this test:
State the null and alternate hypotheses for this test:
Run the correct test using a software and provide the information below. Use correct symbols and round answers to 3 decimal places.
Test Statistic = Degrees of freedom =
Critical Value = p-value =
Fill-in the
(Hint: use the output of the statistical test you ran above!)
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Type of Cookie Sold |
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Thin Mints |
Tagalongs |
Do-si-dos |
Trefoils |
Samoas |
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Sales Method |
At parents’ workplace |
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Door-to-Door |
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Community Events |
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State your statistical decision (and justify it!) Interpret your decision within the context of the problem: what is your conclusion?
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- Please see below. Is Route A to work faster than Route B? Flipping a coin to determine which way to go, you drive each route 20 days. Which test should you use? A matched pairs B 2-sample test for proportions C 2-sample test for means D t-test for means E z-test for proportions F z-test for meansarrow_forwardThe book The Wall Street Journal. Guide to Information Graphics by Dona M. Wong gives strategies for using graphs and charts to display information effectively. One popular graph discussed is the donut pie chart. The donut pie chart is simply a pie chart with the center removed. A recent Harris Poll asked adults about their opinions regarding whether books should be banned from libraries because of social, language, violent, sexual, or religious content. The responses by education level to the question "Do you think that there are any books which should be banned completely?" are shown in the following donut pie charts. (a) What feature of Keith's graph makes it difficult to visually compare the responses of those with some college to those shown in the other graphs? (Select all that apply.) a)The graphs made by Keith and Ramon compare groups across education level. b)The graphs made by Keith and Ramon are all donut pie charts. c)The graphs do not have data labels showing the…arrow_forwardVirginia polled a large sample of individuals to find the percentage of students with known food allergies and the percentage of students without known food allergies. Which of the following could sufficiently display the data if only the two given categories are to be included? Select the correct answer below: bar graph pie chart either a pie chart or a bar graph neither a pie chart nor a bar grapharrow_forward
- Answer it correctly and explain well. I will rate accordingly.arrow_forwardRead the scenario below. Identify the population and sample. Then determine if the bolded value is a parameter or a statistic. Use the appropriate symbol in your answer. A 1993 survey conducted by the Richmond Times-Dispatch one week before Election Day asked voters which candidate for the state's attorney general they would vote for. 37% of the respondents said they would vote for the Democratic candidate. On Election Day, 41% actually voted for the Democratic candidate. The population is The sample is This is a scenario involving The symbol goes with 37% because 37% is a The symbol v goes with 41% because 41% is aarrow_forward3. Determine whether each of the following settings describes an observational study or an experiment. Explain your reasoning. (a) A veterinarian wants to see if a new diet food helps dogs to lose weight. She selects 10 golden retrievers in her practice and records their weights. Then she gives the dogs the new food for one month. She weighs the dogs again after one month and compares the weights. (b) A researcher wants to see how many college students are willing to clean up after someone else. He goes to the cafeteria and leaves a tray of dirty dishes out on a table during lunch time. Then he waits and calculates of the proportion of students who clean up the tray.arrow_forward
- The rating is the percentage of households with TV sets that watched the program. Top Rated TV Programs: 2007-2008 Top Rated TV Programs: 2012-2013 Program Rating Program Rating Survivor: China 9.0 How I Met Your Mother 3.7 Without a Trace 8.8 Family Guy 3.6 The Moment of Truth 8.8 Once Upon a Time 3.6 Two and a Half Men 8.5 Survivor: Philippines 3.5 60 Minutes 8.4 X-Factor Wednesday 3.5 Criminal Minds 8.2 NCIS: LA 3.4 7.9 American Idol - Tuesday American Idol - Wednesday 16.1 15.9 NBC Sunday Night Football Big Bang Theory 6.2 Send data Excel Part 1 of 2 (a) Find the population standard deviation of the ratings for 2007-2008. Round the answer to at least two decimal places. The population standard deviation of the ratings for 2007-2008 is %. Part 2 of 2 (b) Find the population standard deviation of the ratings for 2012-2013. Round the answer to at least two decimal places. Espar 昆 Marrow_forwardYou are the Provost of a University and you want to see if students would like to participate in classroom-based physical activity. You implemented a quick pilot test and collected data after Spring quarter. Below is the first set of data. Based on the data, answer the question. Participant Height (inches) Weight (pounds) Sex (1= male, 2= female) Ever Age (1 = 18-24 participated years, 2 25-34 in classroom exercise (1 = years, 3 35-49 years, 4 50 years No, 2 = Yes) or older) 66 150 1 1 2 72 150 2 2 4 66 150 2 1 2 4 74 215 1 2 1 5 66 112 2 2 6 71 215 2 2 7 69 175 2 2 3 8 66 152 1 2 9 72 375 1 1 10 66 140 1 2 3 What type of variables are height and sex? continuous, dichotomous discrete, ordinal discrete, dichotomous O discrete, nominalarrow_forwardThe brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 95% confident that his estimate is within five percentage points of the true population percentage? Complete parts (a) through (c) below. Question content area bottom Part 1 a) Assume that nothing is known about the percentage of adults who have heard of the brand. n=enter your response here (Round up to the nearest integer.)arrow_forward
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