The NULL HYPOTHESIS in a Chi-Square test for multiple proportions assumes which of the following A all of the proportions are different B all the proportions are the same C at least one of the proportions is different D all the proportions are zero

Need parts 2 and 3 please

Weight Gain of Athletes A researcher wishes to see whether there is any difference in the weight gains of athletes following one of three special diets. Athletes are randomly assigned to three groups and placed on the diet for 6 weeks. The weight gains (in pounds) are shown here. At a=0.005, can the researcher conclude that there is a difference in the diets?   Diet A: 3, 4, 5, 6   Diet B: 12, 13, 14, 6, 7, 8   Diet C: 3, 4, 5 ,6   Part 2. State the hypotheses and identify the claim with the correct hypothesis.       Part 3. Compute the test value. Always round score values to two decimal places.       Part 4. Find the -value. Round the answer to four decimal places.       Part 5. Reject or not to reject the null hypothesis.

Find the margin of error for the given values of​ c, s, and n.   c=0.99​, s=4​, n=21   The margin of error is ___ ​(Round to one decimal place as​ needed.)

Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data.  Test the null hypothesis that the population frequencies for each category are equal.  α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe =   Chi Square test statistic = ______ Group of answer choices

Biologists studying horseshoe crabs want to estimate the percent of crabs in a certain area that are longer than 35 centimeters. The biologists will select a random sample of crabs to measure. Which of the following is the most appropriate method to use for such an estimate? A one-sample z-interval for a population proportion A A one-sample z-interval for a sample proportion B A two-sample z-interval for a population proportion C A two-sample z-interval for a difference between population proportions D A two-sample z-interval for a difference between sample proportions