Statistics Quiz with Solutions (10 Questions)

by Electra Radioti

Statistics Quiz with Solutions (10 Questions)

Statistics Quiz with Solutions (10 Questions)

1 / 10

Determine the probability that, when a die is rolled eight times, the face showing two spots appears exactly twice.

2 / 10

A retailer wishes to estimate the difference in the average sales of a soft drink sold in two kinds of flavors, at 98% confidence and to within six dollars. Estimate the minimum equal sample sizes necessary if it is known that the standard deviations of the sales on these two flavors of the soft drink last week was $11.50 and $14.20.

3 / 10

An investor expects a return of 4% with a standard deviation of 6% on his savings. Use the empirical rule to find the probability of earning a return greater than 15% if the investment returns are normally distributed.

4 / 10

A journalist plans to interview an equal number of people in two cities to compare the proportions in each city that favor the proposal of privatization of government-controlled state public transportation. Let p1 and p2 be the true proportions of people of the two cities who are in favor of the proposal. Suppose it is desired to find a 99.9% confidence interval for estimating p1–p2 to within 0.08. Estimate the minimum equal number of people of each city that must be sampled to meet these criteria.

5 / 10

The deterministic part of the simple linear regression equation describes:

6 / 10

Assume that IQ scores follow a bell-shaped distribution with a mean of 100 and a standard deviation of 16. Use the empirical rule to find the percentage of people who scores between 52 and 148.

7 / 10

Construct a sample space for the experiment of tossing two distinguishable coins (h for heads and t for tails).

8 / 10

Calculate the second quartile (Q2), also known as the median, of the given data set: {1.5, 2.3, 1.7, 3.6, 2.9, 4.2, 3.3}.

9 / 10

Lara orders five handmade mugs from an online site that claims that it averages only five damaged mug for every 50,000 mugs it produces. What is the probability that Lara's order contains one or more defective pieces?

10 / 10

A pair of balanced dice are rolled. What is the probability of not rolling doubles?

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The average score is 38%


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