The 25th and 75th percentile points

There were 34 females that weighed over 250 pounds. What percent of females aged 20 to 29 weighed over 250 pounds? What percent of the N(161.61,48.95) distribution is above 250?

Find the 90th percentile. So 10% of the TV sets last more than what length of time?

calculate the 30th percentile of the data shown, 3.4,3.9,7,11.7,14,20.3,26.2,27.8,28.9

Determine the test​ statistic, z0. and P-value.

The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744

The duration (in days) of human pregnancies follows approximately the ?(266,16)distribution. What proportion of pregnancy durations is more than 270days?

q25- Using percentiles, the difference between which of the following is the interquartile range? Select one: a. 10% and 90% values. b. 25% and 75% values. c. 30% and 70% values. d. 15% and 85% values.

During an experiment, the following times (in seconds) were recorded. Find the mean. 6.3, 5.4, 6, 3.2, 5.4, 5.5 ... The mean is (Round to one decimal place as needed.) ...

Winston has just gone grocery shopping. The mean cost for each item in his bag was $3.48. He bought a total of 9 items, and the prices of 8 of those items are listed below: $2.75,$4.06,$3.16,$3.92,$4.29,$2.77,$3.01,$4.57 Determine the price of the 9th item in his bag.