Statistics Help Now
Part 1 of 3 -Question 1 of 201.0 PointsIf a teacher is trying to prove that a new method of teaching economics is more effective than a traditional one, he/she will conduct a:Reset SelectionQuestion 2 of 201.0 PointsResults from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance.What is your conclusion?Reset SelectionQuestion 3 of 201.0 PointsA type II error occurs when:Reset SelectionQuestion 4 of 201.0 PointsA lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2, does this provide enough evidence to reject the claim that the lab technicians accuracy is within the target accuracy?At the a = .01 level of significance, what is your conclusion?Reject H0. At the = .01 level of significance, there is not enough evidence to support the claim that this technicians true variance is larger than the target accuracy.Reset SelectionQuestion 5 of 201.0 PointsSmaller p-values indicate more evidence in support of the:Reset SelectionQuestion 6 of 201.0 PointsThe form of the alternative hypothesis can be:Reset SelectionQuestion 7 of 201.0 PointsThe Pizza Hot manager commits a Type I error if he/she isReset SelectionQuestion 8 of 201.0 PointsA lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2, does this provide enough evidence to reject the claim that the lab technicians accuracy is within the target accuracy?Compute the value of the appropriate test statistic.Reset SelectionQuestion 9 of 201.0 PointsResults from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance.What is the p-value associated with your test of hypothesis?Reset SelectionQuestion 10 of 201.0 PointsIn an article appearing in Todays Health a writer states that the average number of calories in a serving of popcorn is 75. To determine if the average number of calories in a serving of popcorn is different from 75, a nutritionist selected a random sample of 20 servings of popcorn and computed the sample mean number of calories per serving to be 78 with a sample standard deviation of 7.State the null and alternative hypotheses.Reset SelectionQuestion 11 of 201.0 PointsWhich of the following values is not typically used for ?Reset SelectionPart 2 of 3 -Question 12 of 201.0 PointsAccepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker.Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values.For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.The ABC battery company claims that their batteries last 100 hours, on average. You decide to conduct a test to see if the company’s claim is true. You believe that the mean life may be different from the 100 hours the company claims. You decide to collect data on the average battery life (in hours) of a random sample of n = 20 batteries. Some of the information related to the hypothesis test is presented below.Test of H0: = 100 versus H1: 100Sample mean 98.5Std error of mean 0.777Assuming the life length of batteries is normally distributed, what is the p-value associated with this test? Place your answer, rounded to 3 decimal places in the blank. For example, 0.234 would be a legitimate entry.Reset SelectionQuestion 19 of 201.0 PointsIf a null hypothesis about a population mean is rejected at the 0.025 level of significance, then it must also be rejected at the 0.01 level.Reset SelectionQuestion 20 of 201.0 PointsA low pvalue provides evidence for accepting the null hypothesis and rejecting the alternative.Reset Selection
