## Stats Resources

Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 527 randomly selected adults showed that 56​% of them would erase all of...

Each of two players must choose a number between 1 and 5. If a player’s choice = opposing player’s choice +1, she loses \$2; if a player’s choice ≥ opposing player’s choice + 2 , she wins \$1...

The mean height of women in a country (ages 20minus29) is 63.8 inches. A random sample of 70 women in this age group is selected. What is the probability that the mean height for the sample is greater...

Assume that random guesses are made for 7 multiple-choice questions on a test with 2 choices for each question, so that there are nequals7 trials, each with probability of success (correct) given...

2. The mean consumption of fruit three years ago was 98.9 pounds. A dietician believes that fruit consumption has fallen since then. a. Write out the hypothesis. b. In the context of...

Scores for a common standardized college aptitude test are normally distributed with a mean of 503 and a standard deviation of 103. Randomly selected men are given a Test Preparation Course before...

. The length of the time it takes to complete a word puzzle is found normally distributed with a mean of 80 seconds and a standard deviation of 10 seconds, using 50%-34%-14% figures , approximately...

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35, and the sample statistics include nequals=1621 subjects with 551 saying that they smoked a cigarette...

Researchers are interested in understanding whether adolescents’ frequency of social media use along with the amount of sleep they get at night predict how engaged they are in school. They administered...

Another question to the above if the council plans to set up a poll at the Four grocery stores in the city and survey 100 people at each store

Forty percent of voters think that Congress should help write standards for school food. You randomly select five voters and ask them whether Congress should help write standards for school food....

Listed below are amounts of arsenic in milligrams per serving (μg/serving) in samples of brown rice from California. Construct a 90% confidence interval estimate of the mean amount of arsenic...

decide whether you can use a normal distribution to appropriate the binomial dissipation if you can find the mean and standard deviation a survey of adults found that 69% has used in multi vitamin...

Two cards are drawn with replacement from a standard deck. What is the probability that the first card will be a diamond and the second card will be a face card?

The town Of Paramount has an emergency response team available for emergencies ocurring 12.5 to 73.75 miles from the main town. A study was conducted on showing that the response time from receipt...

A new restaurant with 135 seats is being planned. Studies show that 61 % of the customers demand a smoke-free area. How many seats should be in the non-smoking area in order to be very sure (mu plus...

Offering career academies in high schools has become more popular during the past 30 years because they help students prepare for work and postsecondary education. A principal at a large high school...