In a batch of 5,000 wrist watches, there are on an average 10 defectiv..
In a batch of 5,000 wrist watches, there are on an average 10 defective ones. If a random sample of 500 is selected, then what is the probability of two defective ones? => 0.27 or 0.36 or 0.184 or 1.35..
In a random sample of 25 trees, the variance in height was found to be..
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..
Davison and Germer Experiment
The first experimental proof of the wave nature of electron was demonstrated in 1927 by two American physicists C.J Davison and L.H Germer. The basis of their experiment was that since the wavelength of an electron is of the order of spacing of atoms of a crystal, a beam of elec..
The first experimental proof of the wave nature of electron was demonstrated in 1927 by two American physicists C.J Davison and L.H Germer. The basis of their experiment was that since the wavelength of an electron is of the order of spacing of atoms of a crystal, a beam of elec..Which of the following are the assumptions for two-way ANOVA?I. All sa..
Which of the following are the assumptions for two-way ANOVA? I. All samples are drawn from normally distributed populations. II. All populations have a common variance. III. The groups must be equal in sample size. IV. Within each group, the observations were sampled ..
A random sample of 200 children were surveyed. 80 children said that t..
A random sample of 200 children were surveyed. 80 children said that they liked reading books by Enid Blyton. Out of 600 children, how many could be predicted to like books by Enid Blyton? => 240 or 160 or 480 or 400..
The mean score on a standardized test is 100 with a standard deviation..
The mean score on a standardized test is 100 with a standard deviation of 8. A random sample of 48 scores was found to have a mean of 98. Test at the 0.05 level of confidence and state whether or not to accept the null hypothesis. => The null hypothesis is accepted or The null h..
The 95% confidence interval for the mean number of mangoes in a carton..
The 95% confidence interval for the mean number of mangoes in a carton is between 48.12 and 51.88. If a random sample of 27 cartons were used to determine this interval, what was the standard deviation? => 2 or 3 or 4 or 5..
The 95% confidence interval for the mean number of sheets of paper in ..
The 95% confidence interval for the mean number of sheets of paper in a ream is between 452.76 and 447.24. If the standard deviation is 10 papers, find the size of the random sample that was used to determine this interval. => 5.52 or 50 or 1.41 or 7.09..
In a class, 50% of the students play basketball, 30% study, and 20% wi..
In a class, 50% of the students play basketball, 30% study, and 20% will go to a movie on the weekends. If a sample of 5 students are randomly selected, then find the probability that three play basketball, one studies and one will go to a movie. => 0.15 or 0.6 or 0.054 or 0.024..
The probability that a student has access to Internet from his/her hom..
The probability that a student has access to Internet from his/her home is 40%. If a random sample of 100 students is selected, then find the probability that between 50% and 60% of the students have access to Internet from their home. => 2.61% or 0.026% or 97.39% or 26.1%..
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