Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts​ (a) through​ (c) below.             ​Tinterval - (13.046,22.15) x =17.598 Sx=16.01712719 n=50 a. Express the confidence interval in the format that uses the​ "less than" symbol. Given that the original listed data use one decimal​ place, round the confidence interval limits accordingly.     Mbps____<μ<____Mbps ​(Round to two decimal places as​ needed.)   b. Identify the best point estimate of μ and the margin of error. The point estimate of μ is ____Mbps. ​(Round to two decimal places as​ needed.)

How much money does the average professional hockey fan spend on food at a single hockey game? That question was posed to 10 randomly selected hockey fans. The sampled results show that sample mean and standard deviation were $12.00 and $2.80, respectively. Use this information to create a 95% confidence interval for the mean. Express the answer in the form x+ t/2 (s/ Vn). O A. 12+ 1.833(2.80//10) O B. 12+2.262(2.80//10 OC. 12+2.228(2.80//10) O D. 12+2.201(2.80//10)

Mrs. Gallas wanted to estimate the average weight of an Oreo cookie to determine if theaverage weight was less than advertised. She selected a random sample of 30 cookies andfound the weight of each cookie (in grams). The mean weight was = 11.1921 grams with astandard deviation of sx = 0.0817 grams. Make a 95% confidence interval to estimate the truemean weight of an Oreo.   1. What is the formula for calculating the standard deviation of the sampling distribution of x? 2.What condition must be met to use this formula? Has it been met?

The following questions refer to the output below the following R command. t.test(group2, group3, paired=TRUE) data: group2 and group3 t = -2.4426, df = 39, p-value = 0.01921alternative hypothesis: true difference in means is not equal to 095 percent confidence interval:-8.4983545 -0.7992152sample estimates:mean of the differences-4.648785 What is the null and alternate hypotheses  Which of the following assumptions need to be satisfied for this test? Observations are independent The standard deviations of both populations are normally distributed The distributions of both populations are normal The distribution of the population of differences is normal The distribution of the population of measurements is normal  What is the value of the test statistic (3dp)  What is the p-value  (4dp)Based on this evidence, what is the conclusion