LS23L FINAL EXAM TEST 2024|VERIFIED|ACCURATE ANSWERS|GUARANTEED SET

LS23L FINAL EXAM TEST 2024 LS23L FINAL EXAM TEST 2024|VERIFIED|ACCURATE ANSWERS|GUARANTEED SET Lab A - Accurate AnswerScientific Methodology and the MIT. Which of the following is an example of a null hypothesis? Select one: a. Those that consume caffeine regularly will have a higher heart rate than those that do not. b. People of Asian descent and people of European descent perform the same on IQ tests. c. Male humans perform better on memory tests compared to female humans. d. All tigers are carnivores. e. Giraffes have long necks because they feed on the leaves of tall plants. - Accurate Answerb. People of Asian descent and people of European descent perform the same on IQ tests. Which of the following statements about the p value is true? Select one: a. It allows you to determine the t-value needed for rejecting or accepting the null hypothesis. b. It gives the probability that you are making a mistake in accepting the experimental null hypothesis. c. Only a p value smaller than 0.5 is statistically significant. d. The larger the p value, the more significant your results are. e. It gives the probability that you are making a mistake in accepting the experimental hypothesis. - Accurate Answere. It gives the probability that you are making a mistake in accepting the experimental hypothesis. If a student claims that females answered on average a greater number of correct responses than males on the picture MIT test, what evidence does the student need to gather in order to better support this hypothesis? Select one: a. Verify that the standard deviation is greater than 5 b. See if the degrees of freedom is greater than 1,000 c. Check if the T-value is greater than 0.05 d. Show that the null hypothesis has a high probability of being incorrect e. Check if the T-value is 5% or less - Accurate Answerd. Show that the null hypothesis has a high probability of being incorrect A scientist is interested in studying the parasite responsible for malaria and wants to study the effects of different variables on the parasite's ability to cause disease. She hypothesizes that the parasite is more pathogenic in environments containing glucose. Which of the following most accurately captures the null hypothesis of her experiment? Select one: a. The parasite cannot use glucose b. The parasite is less pathogenic in environments without glucose. c. The parasite switches modes of metabolism in the presence of lactose. d. The parasite is more pathogenic in environments with high glucose levels. e. The parasite's pathogenicity is not affected by environmental glucose levels. - Accurate Answere. The parasite's pathogenicity is not affected by environmental glucose levels. In a recent study, scientists proposed the following hypothesis: "Consumption of Omega-3 fatty acid can reduce the size of cancerous tumors." The following hypothesis was tested. A sample of 500 rats with tumors was collected. Within this sample size, 250 rats were fed with omega-3 (Group 1) while the remaining 250 rats were not (Group 2). After one month of periodically feeding Group 1 with Omega-3 fatty acid, rat autopsies were taken for both groups. The average changes of tumor size were measured and recorded. Average Change in Tumor Size Group 1: -0.124 g Group 2: -0.012 g Degrees of Freedom: 498 T-test: 2.061 P-value: 0.04 Based on the results from the experiment, which of the following is the best conclusion? Select one: a. Consumption of Omega-3 fatty acid has no effect on decreasing the size of previous cancerous tumors. b. Consumption of Omega-3 fatty acid decreases the size of previous cancerous tumors wit - Accurate Answerb. Consumption of Omega-3 fatty acid decreases the size of previous cancerous tumors with statistical significance. In order to reject the null hypothesis in the Memory Interference Test (MIT) lab Select one: a. The t-test value must be less than 0.05 b. The p value must be less than 0.05 c. Both the p value and the t-test value must be less than 0.05 d. The t-test value must be greater than 0.05 e. The p value must be greater than 0.05 - Accurate Answerb. The p value must be less than 0.05 What is the difference between a p-value and t-value? Select one: a. All of these statements are correct b. The t-value tells you the probability that the null hypothesis is correct while the p-value is the first step to finding the t-value. c. The p-value tells you the probability that the null hypothesis is correct while the t-value is the first step to finding the p-value. d. There is no difference between the two values e. The t-value gives you a value between 0 and 1 while the p-value does not have a range of numbers. - Accurate Answerc. The p-value tells you the probability that the null hypothesis is correct while the t-value is the first step to finding the p-value. As a statistician, you conducted an experiment and obtained a t-test value for the two experimental groups. At a confidence level of 5 percent, the corresponding statistical p-value of 0.067 would suggest that: Select one: a. The inherent error of the experiment is calculated to be 6.7 percent. b. The two experimental groups are statistically identical. c. There is a 6.7 percent probability that you are making a mistake by failing to reject the null hypothesis. d. There is a 6.7 percent probability that you are making a mistake in accepting the experimental hypothesis. e. There is probably a statistically significant difference between the two groups of interest. - Accurate Answerd. There is a 6.7 percent probability that you are making a mistake in accepting the experimental hypothesis. The MIT database gives a t-test value of 2.581, which correspond to a p-value of 0.01 for your null hypothesis. According to the hypothetico-deductive approach, what is the next step you should take? Select one: a. Use inferential statistics to compare the populations. b. Make new observations about your populations. c. Retain your n