Of the following, which is untrue?
A.Majority of Z scores in a right skewed distribution are negative.
B.In skewed distributions the Z score of the mean might be different than 0.
C.For a normal distribution, IQR is less than .
D.Z scores are helpful for determining how unusual a data point is compared to the rest of the data in the distribution.
The standard deviation for a population is . This population's sample of 21 observations yielded a mean value of 139.05. It is well known that the population has a normal distribution.
Round your answers to two decimal places.
1) Make a confidence interval for . ( Enter your answer; confidence interval, lower bound ,Enter your answer; confidence interval, upper bound )
2) Construct a confidence interval for . ( Enter your answer; confidence interval, lower bound ,Enter your answer; confidence interval, upper bound )
3) Determine a confidence interval for . ( Enter your answer; confidence interval, lower bound ,Enter your answer; confidence interval, upper bound )
(1) Seek power series solutions of the given differential equation about the given point , find the recurrence relation.
(2) Find the first tour terms in each of two solutions (unless the series terminates sooner).
(3) By evaluating the Wronskian , show that form a fundamental set of solutions.
(4) It possible, find the general term in each solution
how many ways can 9 peoples be assigned to 2-triple, 1-double and 1-single room?
In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 358 trials, the touch therapists were correct 172 times. Complete parts (a) through (d).
a) Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? (Type an integer or a decimal. Do not round.)
b) Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.)
c) Using Emily's sample results, construct a
Round to three decimal places as needed - ?