question 17 The patient recovery time from a particular surgical procedure is normally distributed with a mean of 4 days and a standard deviation of 1.9 days. Let X be the recovery time for a randomly selected patient. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(___,___) b. What is the median recovery time?  days c. What is the Z-score for a patient that took 5.2 days to recover?  d. What is the probability of spending more than 3.7 days in recovery?  e. What is the probability of spending between 3.2 and 4 days in recovery?  f. The 80th percentile for recovery times is  _____days.

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Which of the following statements is not true?     There is only one median for each variable.     One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude.     Another term for the median is 50th percentile.     The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.

Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.

Lecture(10.8): The Peabody Picture Vocabulary Test has a standard score mean of 100 and a standard deviation of 15. You tested a class of grade 2 students wonderinf if these scores would be different  from the population. After testing this hypotheses  you decided to continue looking at this data  to determine if there are any group differences based on birth order. You group the children the on whether  they are the oldest chlid, middle child, or the youngest child. Here is the data based on grouped information.   Oldest child:       87       84     98     104      106      91       96   92 Middle child:       65      74      62      60         73       64       71    78 Youngest child:   115     84      85     83        95        94     108   102    89 Test the hypotheses at (alpha=0.05) level of signifance using the 5 step procedure.Make sure to clearly state the null and alternative hypotheses.Round your answer to 2 decimal. You are encouraged to use the following table to help you…

A. Population ? B. Population mean ? C. Median ? F. IQR ? G. Population standard deviation ?H. population variance ?

Recall the histogram of annual maximum wind speed. Frequency оооооо 25 to 30 30 to <35 35 to 40 A histogram with a single peak is unimodal. A histogram with two peaks is bimodal. A histogram with more than two peaks is multimodal. Look over the histogram again and notice the number of peaks, or modes, in the distribution. Indicate below the class interval(s) where a peak occurs. (Select all that apply.) 40 to 45 45 to < 50 50 to < 55 55 to < 60 14 12 10 60 to < 65 co 4 25 30 35 40 45 50 55 60 65 annual maximum wind speed