A coin is tossed 50 times, and the number of times heads comes up is counted. Which of the following statements about the distributions of counts and proportions is FALSE? The distribution of the count of getting tails can be approximated with a normal distribution. The count of getting heads from a sample proportion of size 20 can be approximated with a normal distribution. The count of getting heads is a binomial distribution.

To describe a normal distrribution, whicch two of the following are absolutely necesssary?   Group of answer choices the standard deviation (or variance) of the distribution the median of the distribution the shape of the distribution the maxmium and minimum of the distribution the mean of the distributionn the size of the distribution

You are given the following information obtained from a random sample of 5 observations. Assume the population has a normal distribution 20 18 17 22 18 You want to determine whether or not the mean of the population from which this sample was taken is equal to 21. Determine the test statistic value?

25 of 30 The following graph shows the mean change in mass of two groups of animals fed on different diets over a period of 2 years: Time course of mass change 275 250 225 200 175 150 125 100 0 3 69 12 15 18 21 24 Time (months) Which of these is the most misleading property of this graph? OThe errors vary between data points. O A best fit curve wasn't shown The interpolating lines have different styles. False zero None of these is relevant to this graph. Mass (g) HH H HH HH HH

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In a recent survey, approximately 90% of U.S. adults own a cell phone. Let's assume this can be modeled as a binomial distribution. In a group of 20 randomly selected adults, what is the standard deviation of the number of adults you would expect to own a cell phone? TTT Arial v T RBC 3 (12pt) Click Save and Submit to save and submit. Click Save All Answers to save all answers.

A binomial experiment is given. Decide whether you can use the normal distribution to approximate the binomial distribution, If you can, find the mean and standard deviation. If you cạnnot, explain why. A survey of adults found that 63% have used a multivitamin in the past 12 months. You randomly select 50 adults and ask them if they have used a multivitamin in the past 12 months. Select the correct answer below and, if necessary, fill in the answer boxes within your choice. O A. No, because nq <5. O B. No, because np < 5. OC. Yes, the mean is and the standard deviation is (Round to two decimal places as needed.) STA 251 STA Charles Warburn 1 18: 9:C Get more help - Clear all Check answer 12:2