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The following hypotheses are given to determine an One-Tail testing.
H0: p≤0
Ha: p >0
A random sample of 10 paired observations indicated a
By using the .05 significance level, what is the p-value or critial value?____________
What is your decision regarding Ho or the null hypothosis?
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The Airline Passenger Association studied the relationship between the number of passengers on a particular flight and the cost of the flight. It seems logical that more passengers on the flight will result in more weight and more luaggage, which in turn will result in higher fuel costs. For a sample of 13 flights, the correlation between the number of passengers and total fuel cost was .37. Is it reasonable to conclude that there is positive association in the population between the two variables?
H0: p≤0
Ha: p >0
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The following hypotheses are given to determine an One-Tail testing.
H0: p≤0
Ha: p >0
A random sample of 10 paired observations indicated a correlation (r) of .35. Can we conclude that the correlation in the population is greater than zero by performing the t-statistic?
By using the .05 significance level, what is the p-value or critial value?____________
What is your decision regarding Ho or the null hypothosis?
-
The Airline Passenger Association studied the relationship between the number of passengers on a particular flight and the cost of the flight. It seems logical that more passengers on the flight will result in more weight and more luaggage, which in turn will result in higher fuel costs. For a sample of 13 flights, the correlation between the number of passengers and total fuel cost was .37. Is it reasonable to conclude that there is positive association in the population between the two variables?
H0: p≤0
Ha: p >0
-
he correlation between the number of police on the street and the number of crimes committed, for a sample of 15 comparable sized cities, is 0.45. At the 0.05 significance level is there a positive association in the population between the two variables?
a. State the null and alternate hypotheses.
H0: _____________________________________________________________________
H1: ______________________________________________________________________
b. State the decision rule.
_____________________________________________________________________________
c. Compute the value of the test statistic.
d. What is your decision regarding the null hypothesis? Interpret the result.
_________________________________________________________________________
Use the 5% significant level, what is the p-value?__
Use the 5% significant level, what is the p-value?__
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- The manager knows from previous years that the company will provide an annual bonus if theaverage sales per customer is greater than $80.00. Based on this sample – with a 5% level ofconfidence – should they expect an annual bonus? t-Test: Paired Two Sample for Means Variable 1 Variable 2 Mean 77.6005 0 Variance 3098.585 0 Observations 100 100 Pearson Correlation #DIV/0! Hypothesized Mean Difference 80 df 99 t Stat -0.43106 P(T<=t) one-tail 0.33368 t Critical one-tail 1.660391 P(T<=t) two-tail 0.667361 t Critical two-tail 1.984217 Here is the data that I ran through excel. I am having a hard time with the hypothesis, decision, and summary.arrow_forwardA hospital administrator wants a statistic to calculate the relationship between the degree of patient satisfaction and whether that patient was treated in the ER or admitted to the hospital. one-sample t point-biserial correlation O independent-measures t sign testarrow_forwardPlease no written by handarrow_forward
- Professor Nord stated that the mean score on the final exam from all the years he has been teaching is a 79%. Colby was in his most recent class, and his class’s mean score on the final exam was 82%. Colby decided to run a hypothesis test to determine if the mean score of his class was significantly greater than the mean score of the population. α = .01. What is the mean score of the population? What is the mean score of the sample? Is this test one-tailed or two-tailed? Why?arrow_forwardA researcher wants to see whether it is significantly more likely or less likely that female elementary schoolteachers wear lipstick at work, and she wants to test the variable with a sample of 200 participants. Which procedure should she use? Mode Correlation O Two-way chi square One-way chi square GE AY 19 J étv A W MacBook Pro Q Search Default Searcharrow_forwardChoose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"arrow_forward
- Fill in the blanks. a. Positive correlations between observations of the response variable result in an underestimate of ________. b. Data collected from a designed experiment is generally preferable to data obtained from ________. c. Adata point whose removal has a substantial effect on one or more sample regression coefficients is called an _________.arrow_forwardAt the .05 significance level, does the data below show significant correlation? x y 3 12.87 4 13.66 5 17.95 6 23.44 7 15.93 8 13.62 9 27.91arrow_forward
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