A directional hypothesis test has a critical region that consists of the extreme ends of both the left and right side of the t distribution. O True False
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A: We need to test: Ho: u1=u2=u3 H1: At least two of the means differ from each other
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A: Given: α=0.1 Hypothesis: H0: μ1=μ2=μ3 H1: At least one of the mean is different from the others.
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- Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of the quality of the restroom facilities, The following tables show the responses rom a sample of 100 persons. Gender of Respondents TOTALS MALE FEMALE Quality of facilties Above Average 8 7 15 Average 26 24 50 Below Average 7 28 35 Totals 41 59 100 A X2 test is carried out to determine whether there is an association between the gender of persons and their opinion. Calculate the expected value for Male and below average?The most important measure in any business is a successful purchase of their product. Task success is a discrete measure (0 is fail, 1 is successful purchase). The following table shows a discrete distribution across 100 clients for product purchase. Table 4 ((purchase success) P(probability purchase) v Calculate the expected value for table4? 0.1 0.3 |0.2 0.4 A. 0.0625 Calculate the discrete variance for table 4? B. 1.04 v What is the binomial probability that you find less than 11 clients who will buy your extended warranty C. 1.90 if you present to 79 clients, and the probability of a client buying a warranty after your presentation is 20%? D. 2 v What is the binomial expected value a client buys your extended warranty if the probability is 20% and 79 E. 4.620 clients are in the sample? F. 1.09 G. 15.80 v What is the binomial variance when a client buys your extended warranty if the probability of buying is 20% and 79 clients are in the sample? H. 12.64 1. 0.91 J. 10/79 K. 3.56 L.…A fair coin is tossed until heads appear for the third time. Let the random variable X be the number of tails shown up to that point. What is the p.m.f of X? What are the expected value and standard deviation of X?
- Select all that apply. We show that our sample statistics have (at minimum) a somewhat normal distribution because this allows us to use t and z critical values. this allows us to use t and z tables for probabilities. this tells us that our sampling is appropriate. normal distributions are cool and that's all we talk about in this class.Is a statistics class' delivery type a factor in how well students do on the final exam? The table below shows the average percent on final exams from several randomly selected classes that used the different delivery types. Face-to-Face Hybrid Online 85 81 100 100 89 82 66 56 99 57 74 98 97 55 88 58 60 75 84 75 55 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of α=0.01. For this study, we should use ANOVA Your friend Stephanie helped you with the null and alternative hypotheses...H0: μ1=μ2=μ3H1: At least one of the mean is different from the others. The test-statistic for this data = (Please show your answer to 3 decimal places.) The p-value for this sample = (Please show your answer to 4 decimal places.)Is a statistics class' delivery type a factor in how well students do on the final exam? The table below shows the average percent on final exams from several randomly selected classes that used the different delivery types. Face-to-Face Hybrid Online 88 92 80 89 97 84 94 68 100 78 90 61 79 99 72 65 87 85 74 83 70 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of a = 0.01. Ert = T = I1 :H H1: At least two of the means differ from each other. 1. For this study, we should use Select an answer v 2. The test-statistic for this data = (Please show your answer to 3 decimal places.) 3. The p-value for this sample = (Please show your answer to 4 decimal places.) 4. The p-value is Select an answer 5. Base on this, we should Select an answer 6. As such, the final conclusion is that... | hypothesis O There is insufficient evidence to support the claim that…
- You are playing a card came, and the probability that you will win a game is p = 0.73. If you play the game 1412 times, what is the most likely number of wins? (Round answer to one decimal place.) Let X represent the number of games (out of 1412) that you win. Find the standard deviation for the probability distribution of X. (Round answer to two decimal places.) O = The range rule of thumb specifies that the minimum usual value for a random variable is u-2o and the maximum usual value is p+2o. You already found u and o for the random variable X. Use the range rule of thumb to find the usual range of X values. Enter answer as an interval using square- brackets and only whole numbers. usual values =The total rejection region for a two-tailed test for a mean, that has a test statistic, of 2.16 has an area or probability closest to about 48% about 1.5% about 98% about 3%Which of the following statements about hypothesis testing is false? A. A Type I error is the chance that the researcher rejects the null hypothesis when in fact the null hypothesis is true. B. The test will never confirm the null hypothesis, only fail to reject the null hypothesis. C. In both the one - tailed and two-tailed tests, the rejection region is one contiguous interval on the number line. D. The rejection region is always given in units of standard deviations from the mean.
- The graph portrays the decision criterion for a one-mean z-test. The curve in the graph is the normal curve for the test statistic under the assumption that the null hypothesis is true. Use the graph to solve the problem. A graphical display of the decision criterion follows. Reject Ho Reject Ho Do not reject Ho N 0.01 0.01 0 1 2 -3 -2 -1 -2.33 2.33 Determine the rejection region. OA. Z≥ 0.01 B. z -2.33 or z= 2.33 O C. z≤ -2.33 or z ≥ 2.33 O D. - 2.33 ≤z≤ 2.33Fill in blank to name the test, but also sketch the bull distribution.A hospital wants to determine if the type of treatment for pneumonia is a factor in recovery time? The table below shows the number of days to recovery for several randomly selected pneumonia patients that had various types of treatment. Sent Home With Medicine A Few Hours in the Hospital Overnight Hospital Stay 25 16 8 15 8 16 15 24 10 17 20 6 17 16 10 28 20 17 12 17 13 26 23 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of α=0.01α=0.01.H0: μ1=μ2=μ3H0: μ1=μ2=μ3H1:H1: At least two of the means differ from each other. For this study, we should use Incorrect The test-statistic for this data = (Please show your answer to 3 decimal places.) The p-value for this sample = (Please show your answer to 4 decimal places.) The p-value is Incorrect αα Base on this, we should Incorrect hypothesis As such, the final…
