I am having trouble solving these study questions if I can please receive help ASAP

Andrew asked seven of his friends how many cousins they had. The results are listed below: 18 12 7 13 7 2 7 Find the mean number of cousins. (Unless indicated otherwise, round your answer to one more decimal place than is present in the original data values). 0 9.4 O 10.9 0 11 O 8.9 The frequency distribution below summarizes employee years of service for Alpha Corporation. What is the class boundaries of scores interval 6-10? Years of service Frequency 1 -5 5 6 10 20 11- 15 25 16-20 10 2125 5 26-30 3 0 6,10 0 59,101 0 599,1001 O 5.5, 10.5 9 8 >57 E6 32 LL: 3 2 1 013 5 7 9111315171921 Time (minutes) The histogram above shows the number of minutes needed by 45 students to nish playing a computer game. Which of the following statement is correct? 0 The distribution appears to be normal. 0 The distribution appears to be uniform. O The distribution is skewed to the right. 0 The distribution is skewed to the left. The histogram below displays the frequencies of waiting times, in minutes, for 175 patients in a dentist's office. 100+ 80- 60- Number of Patients 40- 20+ 0 5 10 15 20 25 30 Waiting Time (minutes) Which of the following could be the median of the waiting times, in minutes? O 7.25 O 15 O 2.50 O 12.25The weight of adult male grizzly bears living in the wild in the continental United States is approximately normally distributed with a mean of 500 pounds and a standard deviation of 50 pounds. The weights of adult female grizzly bears is approximately normally distributed with a mean of 300 pounds and a standard deviation of 40 pounds. Approximately, what would be the weight of a female grizzly bear with the same z-score as a male grizzly bear with a weight of 530 pounds? 0 530 O 276 O 340 O 324 p - P The formula z = is for which of the following hypothesis test? p(1 - p) n O two-sample proportion O two-sample mean O one-sample proportion O one-sample meanA complex electronic device contains three components, A, B, and C. The probabilities of failure for each component in any one year are 0.01, 0.03, and 0.04, respectively. If any one component fails, the device will fail. If the components fail independently of one another, what is the probability that the device will fail in one year? O 0.078 0 Less than 0.01 O 0.922 0 Greater than 0.99 In a survey of public opinion concerning state aid to a particular city, every 50th person registered as a voter was interviewed, beginning with a person selected at random from the rst 50 listed. This is an example of 0 simple random sampling 0 stratied sampling 0 cluster sampling 0 systematic sampling A large-sample 98 percent condence interval for the proportion of hotel reservations that are canceled on the intended arrival day is (0.048, 0.112). What is the point estimate for the proportion of hotel reservations that are canceled on the intended arrival day from which this interval was constructed? That means what is f)? O 0.160 O 0.064 O 0.080 O 0.032