Question Help ▼ A developmental psychologist studies the number of words that seven infants have learned at a particular age. The numbers are 7, 11, 8, 1, 3, 43 , and 20. Figure the (a) mean, (b) median, and (c) standard deviation for the number of words learned by these seven infants. (d) Explain what the results mean to a person who has never had a course in statistics. (a) Find the mean. M= | (Round to three decimal places as needed.) (b) Find the median. Median = (Round to three decimal places as needed.) (c) Find the standard deviation. SD = (Round to three decimal places as needed.) (d) Choose the correct answer below. O A. The mean is the average number of words learned found by dividing the total number of words learned by the number of infants in the study. The median is the middle value in the ordered list of number of words learned. The standard deviation is roughly the total amount the number of words learned for the infants differs from the mean. O B. The median is the average number of words learned found by dividing the total number of words learned by the number of infants in the study. The mean is the middle value in the ordered list of number of words learned. The standard deviation is roughly the average amount the number of words learned for the infants differ from the mean. O C. The mean is the average number of words learned found by dividing the total number of words learned by the number of infants in the study. The median is the middle value in the ordered list of number of words learned. The standard deviation is roughly the average amount the number of words learned for the infants differ from the mean. Click to select your answer(s). Save for Later Max = n = max(r;) 1 Value Frequency Frequency % 10 1 20.00 Penge 梦 $

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Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.