math scores

The line plot represents the number of students who got different scores in a math quiz. What is the difference between the number of students who scored 25 points and those who scored 30 points? => 2 or 4 or 3 or 1..

The bar graph shows the students of 4th to 8th grade, who scored 75% or more in a math test. Compared to students of grade 8, how many more students of grade 7 scored 75% or more in math? => 35 or 40 or 5 or 10..

Irena's scores in her weekly math tests are 35, 39, 60, and 83 out of 100. Predict what will happen to her score in the next weekly test. => Not enough information or No change or Increase or Decrease..

Select the true statement(s). I. The measure of central tendency used in exploratory data analysis is mean. II. The measure of central tendency used in z score is median. III. The mean and standard deviation is better than five-number summary for describing a skewed distribution. => I onl..

The number of candles placed on two tables A and B at 25 instants of time is shown. Give the z score value and verify if the mean number of candles placed on both the tables differ at 98% confidence level. => 0.2092, do not differ or - 0.551, do not differ or 0.9, do not differ or 0.792, ..

The mean weight of 30 students of a class is 52 and that of 40 students of another class is 50. If the standard deviations are 3 and 4.2, then find the z score value and verify if the mean weight of students of first class is greater than that of the second class at 90% confidence. => 2.6..

The mean costs of two sets of soaps of same weight are $4.30 and $4. If the sets were 40 and 30 units in size with the standard deviations $0.60 and $0.90, then find the z score value and verify if they differ in their mean cost at 95% confidence level. => 1.58, mean costs of both the set..

A person verified the records of past 20 years of one estate and that of past 18 years of another estate. The average number of families leaving in the first estate was found as 23 and that of second estate as 20. If the standard deviations were 6 and 8, find the z score value and verify ..

If the average number of people having high cholesterol levels in 20 cities of a state is 370 and that of 25 cities of another state is 350, then find the z score value and verify if there is any difference in both the means at 90% confidence with the variances 120 and 163. => 5.65, the m..

Brian's score in Math, Economics and Zoology are 90.7, 60.3 and 95.5 respectively. How much did Brian score in the 3 subjects put together? => 253 or 249 or 246.5 or 236.5..