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Newest Statistics Questions

1. If your null and alternative hypothesis are:H_0 : p = 0 H_A : p > 0 Then the test is: left-tailed or right-tailed? If we reject
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2. Your friend claims that he averages a 95% on his exams. You want to test his claim.Identify the null hypothesis. (h_0 and h_a)
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3. Your friend claims that he averages a 95% on his exams. You want to test his claim.Identify the null hypothesis. Identify the
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4. Assume that a sample is used to estimate a population mean μ. Find the 98% confidence interval for a sample of size 401 with a
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5. You wish to test the following claim (H_a) at a significance level of alpha= 0.10.H_o : μ = 83.9 H_a : μ < 83.9 You believe
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6. Suppose we are interested in studying a population to estimate its mean. The population is normal and has a standard deviation
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7. The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1446 grams and standard
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8. State which type of parameter is to be estimated, and the correct method for the following. Do not solve.(a) In a simple random
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9. A pollster wants to construct an 98% confidence interval for the proportion of adults who believe that economic conditions are
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10. A pollster wants to construct an 80% confidence interval for the proportion of adults who believe that economic conditions are
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11. sample of size n=38 has sample mean x=58 and sample standard deviation s=7.6. (a) Construct a 99% confidence interval for the
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12. sample of size n=39 has sample mean x=55 and sample standard deviation s=5.8. (a) Construct a 95% confidence interval for the
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13. Boxes of cereal are labeled as containing 14 ounces. Following are the weights, in ounces, of a sample of 16 boxes. It is
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14. Find the critical value Zva/2 needed to construct a confidence interval with level 96%.Round the answer to two decimal places.
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15. The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard
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16. Below, n is the sample size, p is the population proportion, and ^p is the sample proportion. First, check if the assumptions
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17. A news report stated that the mean distance that commuters in the United States travel each way to work is 14 miles. Assume the
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18. About 12% of employed adults in the United States held multiple jobs. A random sample of 66 employed adults is chosen.(a) Is it
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19. Below, n is the sample size, p is the population proportion, and ^p is the sample proportion. First, check if the assumptions
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20. According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2013 was 2.24. Assume the standard deviation
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21. About 14% of employed adults in the United States held multiple jobs. A random sample of 58 employed adults is chosen.(a) Is it
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22. [blank] states that the sampling distribution of x is approximately normal when the sample is large.
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23. A sample of size 19 will be drawn from a population with mean 131 and standard deviation 21.(a) Is it appropriate to use the
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24. You wish to test the following claim H_a at a significance level of alpha =0.05H_o : mu = 74.1 H_a : mu > 74.1 You believe the
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25. You wish to test the following claim H_a at a significance level of alpha =0.005H_o : mu = 80.8 H_a : mu > 80.8 You believe the
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26. Standard Deviation Quick Check3 of 53 of 5 Items Question Compare and interpret the measures to select the data with the least
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27. Calculate the 5-number summary of the skewed dataset 15, 16, 16, 17, 17, 18, 18, 18, 19, 19, 29. When constructing the box plot
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    2. asked by Ur m0m
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28. QuestionExplain how the shape of a distribution determines the appropriate measure of center.(1 point) Responses Symmetrical
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29. Use the following information: \bar{x}_1=11.7, s_1=2.5, n_1=93, \bar{x}_2=10.3, s_2=2.8, n_2=66and the formula to compute the
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30. You wish to test the following claim (H_a) at a significance level of alpha= 0.001.H_o : mu = 74.7 H_a : mu < 74.7 You believe
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31. When conducting a hypothesis test with a binomial distribution (sometimes called a Binomial Test), there are three ways to
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32. You are conducting a study to see if the accuracy rate for fingerprint identification is significantly less than 0.87. You use a
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33. You are conducting a study to see if the probability of catching the flu this year is significantly more than 0.33. You use a
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34. You are conducting a study to see if the probability of catching the flu this year is significantly more than 0.33. You use a
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35. Test the claim that the proportion of people who own cats is larger than 90% at the 0.05 significance level.Based on a sample of
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36. Based on a sample of 300 people, 93% owned catsThe test statistic is: __________________ (to 2 decimals) The p-value is:
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37. You wish to test the following claim () at a significance level of .You obtain a sample of size in which there are 497
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38. You wish to test the following claim (H a) at a significance level of alpha =0.01. H_o : p = 0.4 H_a : p < 0.4 You obtain a
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39. You wish to test the following claim (H a) at a significance level of alpha =0.01. H_o : p = 0.4 H_a : p < 0.4 You obtain a
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40. You wish to test the following claim (H a) at a significance level of alpha =0.01. H_o : p = 0.4 H_a : p < 0.4 You obtain a
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41. Based on a sample of 100 people, 83% owned catsThe test statistic is: 6.60 Incorrect (to 2 decimals) The critical value is: 1.65
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42. The hypotheses of H0: μ = 5.5 and Ha: μ < 5.5 were to be tested. An equivalent confidence interval was found to be (5.2, 5.9).
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43. Which of the following is a good statistical question to ask? Choose TWO that apply.(2 points)Responses What is the shoe size
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44. If you were going to gather some statistics to create a scatter plot, draw a line of best fit, and interpret the slope and
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    2. asked by I_EAT_EVERYDAY
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45. The data below shows the data collected when a group of people was asked their age and the number of pairs of shoes they own.
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    2. asked by cesat
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46. A normal population has mean U=33 and standard deviation O=7 .(a) What proportion of the population is between 18 and 29? (b)
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47. Beer: The following table presents the number of active breweries for samples of states located east and west of the Mississippi
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48. Use the following sample to estimate the population proportion of red automobiles in the United States.Cities Red Blue Silver
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49. Which of these pairs of variables would you expect to be represented by a scatterplot with a negative correlation?(1 point)a
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50. Define or give examples of the followingStatistical Question Biased vs Unbiased Probabilistic vs Deterministic Interpretation
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