Answer all please!

Questions 7-10 are worth 1 point each. 7. Which of these is not a requirement for a two sample TTest? a. Both samples are simple random samples b. Both samples are either large (n > 30} or the distributions of the individuals is approximately normal c. The population sample standard deviations are equal d. The samples are independent 8. | enter a set of paired data, representing the length and widths of back yards in Clintonville, into my calculator and get a correlation coefcient of -1.04. Which of the following statements is true? a. There is an extremely strong negative linear relationship between the two variables b. As one variable increases the other variable tends to increase c. If I change the lengths and widths from feet to yards the correlation coefficient will decrease d. There must be an outlier in the data e. My calculator is broken 9. If the observed and expected values from a contingency table are generally close to each other I will be likely to: a. Fail to reject a null hypothesis of independence b. Reject a null hypothesis of independence c. Throw my hands up in frustration because the observed and expected values don't tell me anything useful 10. When we are given the value of the variable, we can use the least-squares regression line to predict the value of the variable