SSC CGL Tier-2 14th September 2018 Statistics

Instructions

For the following questions answer them individually

Question 91

In one way ANOVA, $$\sigma^2$$ is estimated by:

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Question 92

If ten coins are tossed simultaneously, then the probability of getting at most 1 head is:

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Question 93

Which of the following is NOT a type of data classification?

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Question 94

If the occurrence of events follows Poisson Process with mean rate $$\lambda$$ , then inter-occurrence time of events will follow:

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Question 95

A random sample of 100 ball bearings selected from a shipment of 2000 ball bearing has an average diameter of 0.354 inches with standard deviation 0.048 inches. The 95% confidence interval for the average diameter of these 2000 ball bearings is:

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Question 96

The median for the given frequency distribution is:

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Question 97

In Spearman rank correlation coefficient $$r_s = 1 - \frac{6 \sum d^2}{n(n^2 - 1)}$$, the maximum value of $$\sum d^2$$ in case of untied ranks is:

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Question 98

If $$x = X - \overline{X}$$ and $$y = Y - \overline{Y}$$ and the number of pairs $$(X,Y)$$ is n, then the Karl Pearson’s coefficient of correlation is:

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Question 99

For a group of 100 students, the mean andstandard deviation of scores were found to be 30 and 5 respectively. Later on it was discovered that the scores 34 and 53 were misread as 43 and 35 respectively. The corrected mean equals to:

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Question 100

The given table shows the ranking of ten students in two subjects mathematics and statistics.

The coefficient of rank correlation is:

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