continuous variable in frequency distribution

The scores of 20 students in a quiz are collected and shown in the table: Construct a frequency distribution and a histogram for the data. => Figure - A or Figure - B..

State whether the variables are discrete or continuous. (i). Speed of a car. (ii). Weight of an elephant. => (i) continuous, (ii) continuous or (i) discrete, (ii) continuous or (i) continuous, (ii) discrete or (i) discrete, (ii) discrete o..

What formula is used to gain information about a sample mean when the variable is normally distributed or when the sample size is 30 or more? => z = X - μ σ or z = X ‾ - μ σ n or z = X ‾ - μ σ n or z = X - μ σ..

A discrete random variable assumes each of its values with a certain probability. Let X be a discrete random variable which takes values x 1 , x 2 , x 3 ,x n where p i = P{X = x i } Then X : x 1 x 2 x 3 x n P(X) : p 1 p 2 p 3 p n is called the probability distribu..

Which of the following statement(s) is/are true? I. On a pareto chart, the frequencies should be represented on the y - axis. II. In a frequency distribution, the number of classes should be between 5 and 20. III. The three types of frequency distributio..

In a random sample of 25 trees, the variance in height was found to be 6.9. Find the 95% confidence interval for the standard deviation. Assume that the variable is normally distributed. => between 4.9 and 13.7 or between 4.2 and 13.4 or between 5.5 and 14.1 or between 5.5 and 1..

Select the correct statements: I. Pie graph is the best representation to show the relationship between the parts and the whole. II. Pareto chart is used to show frequencies for nominal or qualitative variables. III. Frequency polygon is another name for ogive. => all ..

The data represents the lengths (recorded to the nearest millimeter) of 40 leaves picked for an experiment. Form an appropriate frequency distribution. Find chi-square test value and check if the variable shown in the frequency distribution is norma..

State whether the variable is discrete or continuous: (i). Number of persons watching a movie in a theatre. (ii). Wind speed at the air port. => (i) continuous, (ii) continuous or (i) continuous, (ii) discrete or (i) discrete, (ii) continuous..

Find the 95% confidence interval for the variance of the ages of players in a basketball team if a sample of 12 players has a standard deviation of 2 years. Assume the variable is normally distributed. => between 2 and 10 or between 2 and 13 or between 2 and 14 or between 2 and ..