Suppose a random sample of n=270 teenagers 13 to 17 years of age was asked if they use social media. Of those​ surveyed, 204 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media.

About 3% of the population has a particular genetic mutation. 900 people are randomly selected.Find the mean for the number of people with the genetic mutation in such groups of 900.

About 2% of the population has a particular genetic mutation. 800 people are randomly selected. Find the mean for the number of people with the genetic mutation in such groups of 800.

table 1 gives flight arrival numbers from a random sample of flights for airlines.  Airline 1  early =133  on-time = 416+ late =150 total 699..  Airline 2 early =58  on-time =354 late =87 total =499.  total early = 191  on-time =770  late =237  overall total =1198 . Test whether there is a difference between the two airlines in the percent of flights that arrive late.                                                                                        FIND THE RELEVANT SAMPLE PROPORTIONS IN EACH GROUP AND THE POOLED PROPORTION.                                                                    P HAT 1=  ? P HAT 2= ?  P HAT =  ?                                                                                                                    STATE THE NULL AND THE ALTERNATIVE HYPOTHESES?                                                                                      GIVE THE TEST STATISTIC AND THE P-VALUE?…

Assume that 900 births are randomly selected and 443 of the births are girls. Use subjective judgment to describe the number of girls as significantly​ high, significantly​ low, or neither significantly low nor significantly high.

The tickets in a box have an average value of 75, and the SD is 10. Twenty-five draws are made at random with replacement from this box. Find the chance that the average of the draws will be in the range 65 to 85.

About 2% of the population has a particular genetic mutation. 900 people are randomly selected. Find the mean for the number of people with the genetic mutation in such groups of 900.

Previously, an organization reported that teenagers spend 12.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is lower. Twenty-three randomly chosen teenagers were asked how many hours per week they spend on the phone, with the following results (in hours): 10.4, 10.4, 17.3, 11.2, 10, 15.2, 9.5, 5.8, 12.5, 11.8, 7.3, 10.6, 11.5, 16.2, 16.5, 14.3, 12.3, 9.9, 13.7, 8.6, 11.3, 13, 16.5 Perform a hypothesis test using a 10% level of significance. Step 1: State the null and alternative hypotheses. Ho: pv 12.5 12.5 (So we will be performing a left-tailed Vv test.) Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are t-distributed with distribution mean and distribution standard deviation Step 3: Find the p-value of the point estimate. = P(tv sv p-value = Step 4: Make a Conclusion About the nulI…

About 4% of the population has a particular genetic mutation. 600 people are randomly selected. Find the mean for the number of people with the genetic mutation in such groups of 600. Submit Question acer

One cable company advertises that it has excellent customer service. In fact, the company advertises that a technician will be there within 30 minutes of when a service call is placed.  One frustrated customer believes this is not the truth, claiming that it takes over 30 minutes for the cable repairman to arrive.  The customer asks 15 of his neighbors how long it has taken for the cable repairman to arrive when they have called for him.  The sample mean for this group is 32.2 minutes with a sample standard deviation of 3.6 minutes.  Test the customer’s claim at the 0.02 level of significance.    (a)  State the null and alternative hypotheses       (b)  Find the value of your test statistic.  Draw a picture and label its location on the normal curve.  Also shade the area where you will find the p-value.          (c)  Calculate the p-value from the sample data.  Compare it to the significance level.  Label it’s value and location on your bell curve           (d)  Write a full…