There are declining levels of cooperation among persons contacted in surveys and this brings concerns to pollsters. A pollster contacts 92 people in the 18-21 age bracket and finds that 78 of them respond and 14 refuse to respond. When 276 people in the 22-29 age bracket are contacted, 259 respond and 17 refuse to respond. Assume that 1 of the 368 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who agreed to respond. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol. prob =

Assume that 800 births are randomly selected and 39 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.

A survey showed that 76​% of adults need correction​ (eyeglasses, contacts,​ surgery, etc.) for their eyesight. If 14 adults are randomly​ selected, find the probability that at least 13 of them need correction for their eyesight. Is 13 a significantly high number of adults requiring eyesight​ correction?

In a recent poll of voters, 20% were displeased with both candidates. If 3 people were picked at random. find the probability that at least one liked one of the candidates.

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.

Fewer young people are driving. In 1995, 63.9% of people under 20 years old who were eligible had a driver's license. Bloomberg reported that percentage had dropped to 41.7% in 2016. Suppose these results are based on a random sample of 1,200 people under 20 years old who were eligible to have a driver's license in 1995 and again in 2016.

. If tossing a loaded coin gives heads 60% of times, what is the likelihood (probability) of observing heads 50 times or fewer out of 100 tosses? 12 The probability of observing heads 50 times or fewer out of 100 would be 0.03 or 3 percent. use excel.

5. Are whites more likely to claim bias? It was found that 40% of the workers were white, 35% were black and 25% are other races. Given that a worker was white, the probability that the worker had claimed bias was 20%.Given that a worker was black, the probability that the worker had claimed bias was 65%. Given that a worker was other race, the probability that the worker had claimed bias was 55%. If a randomly selected worker had claimed bias, what is the probability that the worker is black? a) 0.5112 b) 0.2308 c) 0.3461 d) 0.6296

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…

A journalist randomly asked 108 men and 142 women if they had texted while driving anytime during the past month. Of those questioned, 51 men and 73 women admitted that they did.  Does the journalist have enough evidence to indicate that there is no significant difference in the percentage of men and the percentage of women who text while driving?