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- Which of the following is NOT a requirement of testing a claim about the mean of the differences from dependent samples? Choose the correct answer below. O A. The degrees of freedom aren- 2. O B. The samples are simple random samples. O C. The sample data are dependent. O D. Either the number of pairs of sample data is larger than 30 or the pairs have differences that are from a population having a distribution that is approximately normal, or both.The first four deviations from the mean in a sample of n = 5 reaction times were .3, .9, 1.0, and 1.3. What is the fifth deviation from the mean? Give a sample for which these are the five deviations from the mean.For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 34 beats per minute, the mean of the listed pulse rates is x=72.0 beats per minute, and their standard deviation is s=13.8 beats per minute. a. What is the difference between the pulse rate of 34 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 34 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 34 beats per minute significant?
- For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 38 beats per minute, the mean of the listed pulse rates is x=79.0 beats per minute, and their standard deviation is s=22.1 beats per minute. a. What is the difference between the pulse rate of 38 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 38 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 38 beats per minute significant?Please answer the following parts d, e and f only, as a, b and c were alreday provided. Also, please show using graphing calculator and not Excel. Thanks. Adult IQ scores can be modeled using a normal model with mean 100 and a standadrd deviation of 15. a. Find the proportion of IQ scores that are less than 115. b. Find the proportion of IQ scores that are greater than 131.5. c. Find the proportion of IQ scores between 90 and 110. d. Find the proportion of IQ scores that are betewwn 110 and 120. e. Find the IQ score above which there are 10% of the scores. f. Find the IQ score below which there are 20% of the scores.Assume the IQ scores in a population are normally distributed with a mean value of 100 and a standard deviation of 15. Compute the proportion of people in the population for each of the following ranges of IQ scores. The answer should include hand calculations of z-scores involved.a. less than 85b. higher than 118c. between 85 and 133d. between 97 and 115
- Which of the following is True about the Z-score of an observation? A. The Z-score of an observation is defined as the number of standard deviations from the mean. B. If the observation is twice as large as the mean, its Z-score is 1. C. The Z-score of an observation is a number between 0 and 1. D. If the observation is right at the mean, its Z-score is 1.After 4 points are added to every score in a distribution, the mean is calculated and found to be μ = 26. What was the value of the mean for the original distribution? A. 30 B. Cannot be determined from the information given C. 34 D. 22For a data set of the pulse rates for a sample of adultfemales, the lowest pulse rate is 33 beats per minute, the mean of the listed pulse rates is x=71.0 beats per minute, and their standard deviation is s=23.1 beats per minute. a. What is the difference between the pulse rate of 33 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 33 beats per minute to a z score. d. If we consider pulse rates that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 33 beats per minute significant?
- Which of the following statements is correct about the standard error of the mean ( s/√n )? A. The larger the sample size, the smaller the standard error of the mean (assuming that the sample standard deviation remains unchanged). B. The standard error of the mean measures the average distance between an observation in a sample and the population mean. C. Both A and B. D. Neither A nor B.Choose the letter of the correct answer. 1. Which of the following is always true? A. standard deviation can be less than 0 B. mean can be used for qualitative data C. coefficient of variation is an absolute dispersion D. standard deviation is always positive 2. The following statements indicate the use of inferential statistics EXCEPT A. A manufacturer of light bulbs claims that their light bulbs last for 10,000 hours. B. The yearly expenditures on food for 15 families are estimated to be P200,000. C. A recent study showed that eating garlic can lower blood pressure. D. A survey says that 1 out of 50 males is a member of a fitness center. 3. The "time consumed on Facebook on a particular day" is what type of variable? A. qualitative B. discrete quantitative C. continuous quantitative D. cannot be determined2. The table below shows the recorded speeds of several cars on a busy street: Recorded Speeds (mph) 35 38 41 35 36 55 a) Calculate the mean absolute deviation both with and without the data value of 55. Round to the nearest hundredth if necessary.
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