Can someone please answer them fast i needs for practice can someone answer them in 15 min.

Question 1 (1 point) The Human Resources Director for a large company is studying absenteeism among hourly workers. A sample of 120 day shift employees showed that 15 were absent more than five days last year. A sample of 80 afternoon shift employees showed 18 to be absent more than five days last year. A hypothesis test is conducted at the 1% significance level to determine whether there is a higher proportion of absenteeism among afternoon employees. What is the value of the pooled proportion? Express your solution rounded to three decimal places. Your Answer:Question 2 [1 point) Anecdotal evidence suggests that you "gain 10 pounds" after eating Christmas dinner. For fun, a family decides to test this claim by measuring their weight before and after eating Christmas dinner. The results are summarized in the table below. Family Member Weight Before (lbs) Weight After (lbs) 1 230 235 2 145 143 3 160 153 4 38 39 5 90 33 A hypothesis test is conducted using a 5% signicance level to determine whether there is evidence to conclude that, on average. the family gained weight after eating Christmas dinner. What is the standard deviation of differences between the paired observations? Express your solution rounded to three decimal places. Your Answer: Question 3 (1 point) Midterm 2 marks for a sample of 4 students in the morning section of BUS 230 and 5 students in the afternoon section of BUS 230 are shown in the table below. Statistic Morning Afternoon Sample Mean 41 marks 42.4 marks Sample Std. Dev. 4.96 marks 6.91 marks What is the value of the pooled variance if a two-sided hypothesis test is conducted at the 10% significance level? Assume that the population standard deviations are equal. Express your answer rounded to two decimal places. Your Answer:Question 4 (1 point) When conducting a test of hypothesis for dependent samples: O the sample size should be at least 30 pairs of observations. O the significance level should be more than 5%. the p-value should be more than 10%. O none of the above.Question 5 [1 point} Suppose we test the difference between two proportions at the 5% signicance level. If the computed test statistic is -1.U?. what is our conclusion? O reject the null hypothesis. O we should take a larger sample. O we should reserve judgement. O fail to reject the null hypothesis. Question 6 [1 point} A retail store is interested in understanding the spending behavior of their in-store and online customers. The information will allow the retailer to reevaluate their business approach; in particular, they would like to know whether it would be worthwhile to expand their online presence. Information was collected for two samples over 6 months. A sample of 53 in-store customers revealed an average amount of $14? worth of merchandise purchased with a standard deviation of $45. A sample of 41 online customers revealed an average amount of $165 worth of merchandise purchased with a standard deviation of $30. A hvpothesis test is conducted at the 5% signicance level to determine whether in- store customers spend less than online customers. What is the value of the sample test statistic? Assume that the population standard deviations are unequal. Express your solution rounded to two decimal places. Your Answer: :] Answer Question 7 [1 point) Fora hypothesis test comparing two population means, the combined degrees of freedom are 24. Which of the following statements about the two sample sizes is not true? Assume that the population standard deviations are equal. O sample A = 12; sample B = 14. O sample A = 13: sample B = 13. 0 sample A = 11; sample B = 13. 0 sample A = 10; sample B = 16. Question 3 [1 point) Using two independent samples. we test for a hvpothesized difference between two population means. The population standard deviations are equal. The rst sample consists of 15 observations and the second sample consists of 12. How manv degrees of freedom are associated with the critical value? Question 9 [1 point} If we are testing for the difference between two population means and assume that the two populations have equal but unknown standard deviations, the variances are pooled to compute the best estimated variance. Question 9 [1 point} If we are testing for the difference between two population means and assume that the two populations have equal but unknown standard deviations, the variances are pooled to compute the best estimated variance. Question 10 (1 point) A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume that the population standard deviations for those drinking regular-coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated-coffee. A random sample of 50 regular-coffee drinkers showed a mean of 4.35 cups per day; while a random sample of 40 decaffeinated-coffee drinkers showed a mean of 5.34 cups per day. What is the value of the sample test statistic for a one-sided hypothesis test conducted using a 1% signicance level. Express your answer rounded to two decimal places. Your