170, 70, -10, -70, -350, 149, 350, 171, -76, 160   The dataset shows the amount of dollars that a group of friends won (positive numbers) or lost (negative numbers) while playing Blackjack at a casino in Las Vegas. On average, people walk away from tables in Las Vegas not having made any money ($0).   Would you conduct a one-tailed test or two-tailed test

What is the mean? -3 5 -1 -3 6 1 5

−15,3,3,−15,1,−15,3 Calculate the value of the sample variance. Round your answer to one decimal place.

How do you you decide whether your a test is one, two, left or right tailed?

How to find the values and find it in excel

The boxplot below shows salaries for Actuaries and CPAS. СРА Actuary + 30 35 40 45 50 55 60 65 70 75 80 Salary (thousands of $) Tiffany makes the median salary for an Actuary. Mariah makes the first quartile salary for a CPA. Who makes more money? Tiffany O Mariah

Macmillan Learning An extensive study in Antarctica concluded that the mean height of adult emperor penguins in the wild is 44.5 in. Cassandra believes that captive emperor penguins have a greater mean height due to better nutrition. To test this idea, she decides to conduct a one-sample t-test to see if the mean height of captive emperor penguins is greater than 44.5 in. She selects a simple random sample of 26 penguins from different zoos around the country and has each penguin measured. The summary statistics of the sample are given below. Sample size n = 26 Sample mean x = 45.6 in Sample standard deviation s = 4.3 in The heights of emperor penguins are normally distributed, and there are no outliers in the sample. Construct the null and alternative hypothesis for the appropriate one-sample t-test for the mean height of captive emperor penguins. Ho: H₁: =

MATH PROBABILITY AND STATISTICS, PLEASE ANSWER JUST IN 10 MINUTES, NOT ANYMORE Find the sample variance of the following sample: 6, 7, 2.

researcher wonders if the amount of sleep new parents get is associated with how grumpy they are. The researcher recruits a sample of 100 new parents and asks them (1) how many hours of sleep they are getting each night, (2) how many hours of sleep their baby is getting each night, and (3) how grumpy they 4 are on a scale from 0 (not at all grumpy) to 100 (very grumpy). They saved the results to a file called hwo_parenthood. cs. Load the data into jamovi and answer the following questions. 3. What is the value of the test statistic for each association? 4. What is the degrees of freedom for each association? 5. What is the precise p-value as reported by jamovi for each association? Make sure you report the value to at least three decimal places. 6. Which of the associations are significant?? 7. What is the direction of each association ? 8. What is the effect size for each association? Are they weak, moderate, or strong? 9. What does each of the associations mean in plain language?