1-a type II error is rejecting a true nulll hypothesis

A- True B- False

2-A local tire dealer wants to predict the number of tires sold each month. The dealer believes that the number of tires sold is a linear function of the amount of money invested in advertising. The dealer randomly selects 6 months of data consisting of tire sales (in thousands of tires) and advertising expenditures (in thousands of dollars). Based on the data set with 6 observations, the simple linear regression model yielded the following results.

sum x = 24 , sum x^2 = 124 , sum y= 42, sum y^2 = 338 sum xy = 196

calculate the coefficient of determination and the coefficient of correlation between x and y. interpret the coefficient of determination . Also, find the slope and intercept and interpret the estimated regression equation. what would the predicted sales of tires be if he spends five thousand dollars in advertising?

Perform the test of significance for the slope coefficient. use 5% level of significance

3- If a one-sided null hypothesis for a single mean cannot be rejected at a given significance level, then the

corresponding two-sided null hypothesis (i.e., the same sample size, the same standard deviation, and the

same mean) will __________ be rejected at the same significance level.

A. Always

B. Sometimes

C. Never