z = 2.50 and a p-value of (1-9938) .0062 < 05 So there is sufficient evidence to support the alternative hypothesis that the mean price of gasoline in California is greater than the national average of $2.86. O2- 2.50 and a p-value of .9938 .9938>.05 So there is not sufficient evidence to support the alternative hypothesis that the mean amount of money spent on back to school supplies is greater than $606.40.

True or False? Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to determine if there is a difference in the mean dosage of the medication needed to cause a decrease in their INR blood test. If the mean dosage for 75 Caucasian individuals required to get their INR blood test in range is 6.1 mg with a standard deviation of 1.7 mg and the mean dosage for 75 African American individuals required to get their INR blood test in range is 4.3 mg with a standard deviation of 0.9 mg, the S p value obtained while calculating the test statistic is approximately 1.14 mg.  True  False

Use the data on student load. to test the claim that mean student load is more than 6.5 units.  Use α = 0.10.  Assume all requirements have been met. Student Unit Load 3, 12, 6, 9, 6, 12, 15, 12, 7, 9, 3   Test the claim that mean student load is more than 6.5 units.  Use α = 0.10.  Assume all requirements have been met.

I tried the two last choice both of them are wrong.

In a set of 48 months of data for medical the mean is 15 days and standard deviation of 4.2 how many months fewer than 19.2 days per month reported medical leave ( one standard deviation above the mean?

Data from the National Association of Realtors indicates that mean price of a home in Denver,Colorado, in the first three months of 2018 was $255,300. We can write this as 255.3 with unitsof thousands of dollars for our calculations. A random sample of 60 homes sold in 2020 had amean price of 235 (thousand dollars). Assume the standard deviation s = 140 (thousand dollars).Can we conclude that the mean price in 2020 differs from the mean price in the first 3 months of2018? Use the α = 0.05 level of significance.Parameter_____________________________________________________________________Null hypothesis ____________________________________Alternative hypothesis ________________________________________This test is: One-sided Two-sidedTest statisticp-valueCircle a decision: Reject H0 Do not reject H0Conclusion: At the 0.05 level of significance, we ___________________ have sufficient evidenceto say that________________________

10) The top point in the scatter plot (6.5, 1459) is for Washington, DC. Find the predicted DC violent crime rate if x=6.5. Then find the residual for DC using the predicted violence crime rate and the actual violent crime rate (the actual crime rate is provided in the first sentence of this question). Prediction = Actual y-value = Residual =

Is the mean the measure of central tendency that makes the sum of squared deviations around it minimal?

Consider a value to be significantly low is its z score less than or equal to -2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 21.4 and the standard deviation was 4.8. Identify the test scores that are significantly low or significantly high.

F budy A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would like to do a statistical test regarding the mean monthly mileage, μ, of cars rented in the U.S. this year. The consumer group has good reason to believe that the mean monthly mileage of cars rented in the U.S. this year is greater than last year's mean, which was 2700 miles. The group plans to do a statistical test regarding the value of u. It chooses a random sample of monthly mileages and computes the mean of the sample to be 2800 miles and the standard deviation to be 750 miles. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H₁ that should be used for the test? H₂ : Η H₁ :0 (b) Suppose that the group decides to reject the null hypothesis. What sort of error might it be making? (Choose one) ▼ (c) Suppose the true mean monthly mileage of cars rented in the U.S. this year is 2700. Fill in…