A restaurant manager wants to know if one of the three specials on the menu (baked fish, roast beef, or chicken salad) is more popular than the others. He selects a random sample of special orders and counts the number of orders in each category. The results are compiled in the following table. Fish Beef Chicken 52 42 29 Select the appropriate null hypothesis for this experiment. One meal is less popular than the other two. There is no difference in popularity among the three meals. Customers prefer the baked fish to the roast beef. One meal is more popular than the other two. Complete the following table of expected frequencies. Fish Beef Chicken The chi-square statistic for these data is x?

A restaurant manager wants to know if one of the three specials on the menu (baked fish, roast beef, or chicken salad) is more popular than the others. He selects a random sample of special orders and counts the number of orders in each category. The results are compiled in the following table. Fish Beef Chicken 52 42 29 Select the appropriate null hypothesis for this experiment. One meal is less popular than the other two. There is no difference in popularity among the three meals. Customers prefer the baked fish to the roast beef. One meal is more popular than the other two. Complete the following table of expected frequencies. Fish Beef Chicken The chi-square statistic for these data is x?

Name: A restaurant manager wants to know if one of the three specials on th
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Description: A restaurant manager wants to know if one of the three specials on the menu (baked fish, roast beef, or chickensalad) is more popular than the others. He selects a random sample of special orders and counts the number oforders in each category. The

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Q16
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Ann and Sam are both testing the hypothesis that 40% of plain M&M are orange. Ann draws a sample of 150 plain M&M and finds that 45% of her sample is orange. Ann's test statistic is?
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A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
A plumber was interested in determining whether there is a significant difference in the price charged for plumbing tools by two hardware stores. The plumber selected five tools and recorded the price for each tool in each store. The following data was recorded: Store 1 2 Tool 2 R59.25 R22.50 R450 R44.25 R22.50 R36.75 R75 4 R480 R44.25 R60 Perform the appropriate test of hypothesis to determine whether there is a significant difference, on average, in the price of plumbing tools between the two stores, showing all 7 steps. Include both the rejection region and the p-value.
10
A man was buying shoes wheb a salesperson commebted on hiw small his feet were. After telling her she had a lousy sales technique, he decided to inveatigate if he really does have feet that are smaller than the typical american man. If he is in the 20th percentile for shoe size among american men, is the saleswoman right or wrong?
A 2016 episode of the NPR program "This American Life" featured a radio show host from Tigerville South Carolina and focused on the divisions among evangelical Christians regarding their support of the then-presidential candidate Donald Trump. We know that these divisions still exist, and suppose you want to survey the people of Tigerville (population: 1.312) to see how many of them support Donald Trump today, and you want to use a simple random sample. (a) An SRS of 150 people is taken and it turns out that 55 support Trump. Estimate the proportion of people in Tigerville that support Trump and give a 95% confidence interval for the true proportion of Trump supporters using your estimate. (b) If 100 simple random samples are taken independently, and 100 such 95% confidence intervals are constructed, what is the probability that all 100 of these intervals will cover the true proportion? Does this number make sense to you? Explain.
A community college wants to find out how students enrolled in remote courses feel about remote learning,so a random sample of students is needed to form a focus group. You are a data scientist in charge ofidentifying a sample of students for the focus group. Why is it important to select a random sample in this case? Would it be ok for the college to ask for volunteers for the focus group? Why or why not? Are there pros and cons for each samplingapproach? Which is best and why? Could Stratified Random Sampling have also been used? What benefits might this approach have inselecting the sample of students for the focus group? Explain or give an example of how this could bedone. 874786667172747718114301699108421009846176806728505883964138722994692957574451054463441011799713150445482678936083128648618194219333913373855511070208365643664235172417102465259067655654964950492581611669287944720629621174445585225321068039268392266267994
The sample data below represent the number of late and on time flights for three airlines. Flight Late 1 Airline 2 3 81 93 98 On Time 219 207 302 (a) Formulate the hypotheses for a test that will determine if the population proportion of late flights is the same for all three airlines. P₂ P3 O Ho: Not all population proportions are equal. Ha: P₁ = P₂ = P3 Ho: P₁ = P₂ = P3 H: Not all population proportions are equal. O Ho: All population proportions are not equal. Ha: P₁ = P₂ = P3 O Ho: P₁ = P₂ = P3 H: All population proportions are not equal. (b) Conduct the hypothesis test with a 0.05 level of significance. Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = Need Help? Read It State your conclusion. Reject H. We cannot conclude that not all of the population proportions are equal. O Do not reject Ho. We conclude that not all of the population proportions are equal. O Reject H. We…