Any help is appreciated.

Question 1 Suppose that we reject a null hypothesis at the .05 level of significance. Then for which of the following values do we also reject the null hypothesis? O .06 O .04 O .03 O .02 Question 2 Consider testing the hypotheses Ho: U = 50 vs. Ha: u # 50. If n = 64, sample mean = 53.5, and s = 10, then the value of the test statistic is: O 1.96 O 1.64 O 2.80 O -2.80 Question 3 If we reject the null hypothesis, we conclude that: O the test is statistically insignificant at whatever level of significance the test was conducted. O there is enough statistical evidence to infer that the null hypothesis is true. O there is not enough statistical evidence to infer that the alternative hypothesis is true. O there is enough statistical evidence to infer that the alternative hypothesis is trueQuestion 4 A portfolio manager was analyzing the price-earnings ratio for this year's performance. His boss said that the average price-earnings ratio was 20 for the many stocks, which his firm had traded. The portfolio manager though that the price earnings ration was some other value and randomly selected a sample of 50 P/E ratios, found a mean of 18.17 and standard deviation of 4.60. Assume that the population is normally distributed and test at the 0.01 level of significance. The correct hypotheses are: Ho: u = 18.7 Ha: u = 18.7 O True O False Question 5 During the last energy crisis, a government official claimed that the average car owner refilled the tank when there was 3 gallons left in the tank. To check the claim, 10 cars were surveyed as they entered a gas station The amount of gas was measured and recorded as follows: 3, 5, 3, 2, 3, 3, 2, 6, 4, and 1. If we assume that the amount of gas remaining in tanks is normally distributed with a standard deviation of one gallon, can we conclude at the 10% significance level that the official was correct? O Yes, the official is correct O No, the official is not correct O Cannot be determined with the information given