continuous variable in frequency distribution

Identify the statement which does not form a part of the procedure in the construction of a frequency table. I. The number of classes should be between 6 and 20. II. The class width should be an even number. III. The classes must be mutually exclusive. IV. The classes must be continu..

A jewellery store sells gold chains, pendants and bracelets. The cost of 24 different gold bracelets (of the same weight) are $150, $100, $150, $200, $150, $100, $150, $100, $150, $100, $150, $100, $150, $100, $150, $200, $100, $150, $150, $100, $150, $200, $150 and $200. Make a frequency..

The students of Environmental studies collected the data of the life span of Zebras from the zoological authorities which are as follows. 20, 12, 19, 22, 28, 30, 17, 25, 10, 23, 16, 18, 21, 32, 15, 14, 8, 22, 11, 13, 18, 20, 21, 19, 19 Find the average life span of a Zebra by constructing a fr..

On the annual day function of a school, 200 chocolates were brought to be distributed among the students of 6 th , 7 th , 8 th and 9 th grades. The frequency table shows the number of chocolates that were distributed among the students of different grades. How many cho..

According to a school report, the students in that school spend on an average 15 hours in front of computers. Assume the variable is normally distributed and the standard deviation is 2 hours. If 30 students are selected at random, then find the probability that the mean of the ..

A survey on hospitals concluded that the standard deviation of the amount of time a patient has to wait before being attended by emergency room personnel is more than 5.4 minutes. Waiting times in the case of a sample of 16 patients are recorded and it was found that the standard deviation was 6.6 ..

The scores of 60 students of a class are shown in the frequency distribution. Scores Frequency 86 - 96 14 97 - 107 7 108 - 118 13 119 - 129 10 130 - 140 11 141 - 151 5 Find the mean and the modal class of the data. => 115 and 151 or 115.2 and 86 - 96 or 115.3 and 141 -..

The quiz scores of 50 students of a class is as shown in the frequency distribution. Quiz score Frequency 0 - 2 6 3 - 5 13 6 - 8 9 9 - 11 14 12 - 14 8 Find the variance and standard deviation. => 7.3 and 68.14 or 3.89 and 1.97 or 3.89 and 15.15 or 15.15 and 3.89..

The blood urea nitrogen (in milligrams per deciliter - mg/dl) count of 20 randomly selected patients is shown in the frequency distribution table. Blood urea nitrogen Frequency 11 - 13 3 13 - 15 4 15 - 17 3 17 - 19 5 19 - 21 5 Find the variance and standard deviation. ..

A consumer claims that the standard deviation of the quantity of softdrink in a bottle is more than 0.23 oz. The researcher of the company selected a sample of 10 bottles and found the standard deviation as 0.32 oz. Find the P -value for the test. At α = 0.05, is there enough evidence to supp..