This is statistics course and I need help with those questions. This is sampling distribution and This is not Normal unit.

Question 10 10 pts 10. Suppose that a teacher forms a hypothesis that it is entirely random which day of the week students are absent. She would say, therefore, that if she were to start recording students absences in a chart each day, she would expect to see something like this: 20 20 20 2O 20 However, what she actually found was that the absences turned out like this: 22 18 17 18 25 Compute the chi-square statistic. O 0.5 o 1.9 o 2.3 o 5.1 o 14 D Question 6 10 pts 6. A student surveys 35 people about their birthday and checks which day of the week each person was born on. The student predicts that the day of the week you are born on is random and that you would expect to find that the 35 people surveyed were equally distributed with about 5 people being born on each day of the week. The actual survey data is reported below. Compute the chi-squared test statistic. Day of week: Sunday Monday Tuesday Wednesday Thursday Friday Saturday Number born that day: 2 6 6 7 6 7 1 [ Select ] = [ Select ] [ Select] X2 I XD Question 6 10 pts 6. A student surveys 35 people about their birthday and checks which day of the week each person was born on. The student predicts that the day of the week you are born on is random and that you would expect to find that the 35 people surveyed were equally distributed with about 5 people being born on each day of the week. The actual survey data is reported below. Compute the chi-squared test statistic. Day of week: Sunday Monday Tuesday Wednesday Thursday Friday Saturday Number born that day: 2 6 6 7 6 7 1 [ Select ] [ Select ] Select ] 6.4 6.8 7.2 7,6 8.0Question 1 10 pts 1. Which of these is true for a t-distribution with 50 degrees of freedom? On=25 On=49 On=50 On=51 On=100 Question 2 10 pts 2. According to Table B, the table of t distribution critical values, which of these Condence levels, C, is associated with a tail probability of 0.02? O 93% O 96% O 94% O 90% O 30% Question 3 10 pts 3. According to Table B, the table of t distribution critical values. which of these is NOT associated with a t-critical value of 1.333? O tail probability 0.10 O 80% condence interval 0 21 degrees of freedom 0 a sample size of 18 Question 4 10 pts 4. Which of these best describes the Chi-square distribution when the degrees of freedom (de is more than 90? Q It is uniform Q It is bimodal Q It is skewed left 0 It is approximately normal Question 5 10 pts 5. Which of these is NOT true regarding the Chi-square? O The test statistic can be zero. 0 The distribution can be used to test if two events are independent. 0 The distributions are skewed right. 0 As the degrees of freedom increase, the distributions become more skewed. Question 7 10 pts 7. Which of the following are true of the t-distribution? There may be more than one correct answer. E] skewed E] uniform C] bell shaped [:] taller peak than the standard normal distribution C] more area under the tails than the normal distribution Question 8 10 pts 8.Which of these is NOT a possible value for the chi-square test statistic? 0 105 0 92.1 0 3 o 0 o 4 Question 9 10 pts 9. Which of these statements are true regarding the Student's t-distribution? O Ionlyr 0 || only 0 III onlyr 0 II and Ill only,r O I, II, and Ill Key Concepts? l. Student's tdistributions are useful when sample sizes are large. ll. tdistributions are bell-shaped, but the peaks are shorter and the tails are taller than the standard Normal distribution. lll. As the sample sizes increase, the t-distributions become closer and closer to the Normal distribution