Compute the interquartile range from the following data.$\begin{array}{llllllllll}5 & 8 & 14 & 6 & 21 & 11 & 9 & 10 & 18 & 2\end{array}$
The claim is that for a smartphone carrier's data speeds at airports, the mean is μ = 17.00 Mbps. The sample size is n = 16 and the test statistic is t = -1.613. This is a two-tail test. Using Excel.
Employers often use standardized measures to gauge how likely it is that a new employee with little to no experience will succeed in their company. One such factor is intelligence, measured using the Intelligence Quotient (IQ). To show that this factor is related to job success, an organizational psychologist measures the IQ score and job performance (in units sold per day) in a sample of 10 new employees.
IQJob Performance100201153410822981812042147541324385511052111037
(a) Convert the following data to ranks and then compute a Spearman correlation coefficient. (Round your answer to three decimal places.)
(b) Using a two-tailed test at a 0.05 level of significance, state the decision to retain or reject the null hypothesis.Retain the null hypothesis. Reject the null hypothesis.
IQ scores are often reported to be normally distributed withu=100 and o=15.0. a random sample of 59 people is taken. step 2 of2 what is the probability that the mean IQ of people in the sampleless than 96
Assume that all grade-point averages are to be standardized ona scale between 0 and 4. How many grade-point averages must beobtained so that the sample mean is within 0.015 of the populationmean? Assume that a 95% confidence level is desired. If using therange rule of thumb, σ can be estimated as range 4= 4−0 4=1. Doesthe sample size seem practical? The required sample size is__
Chocolate chips are randomly distributed onto on a bakery's cookies with a rate, on average, of 9 chips per cookie. Assume that the cookies are independent.
a. What is the distribution of the number of chips per cookie and what is the parameter of interest?b. What is the probability that a randomly selected cookie contains exactly 10 chips?c. What is the probability that a randomly selected cookie contains at least 2 chips?d. What is the standard deviation of the number of chips per cookie?e. On average, how many cookies would you have to check until found a cookie with exactly 10 chips?
