Question

Question 1 [25]
Namibia Car Dealers wants to determine the number of defects per new car. Suppose you are asked to conduct the quality survey for cars, suppose you sampled 30 new cars and following data on number of defects per car were recorded.
0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2 a) Compute the sample mean number of defects per car [2] b) Compute the sample standard deviation [5] c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively [2] d) Compute the probability that number of defects per car more than 1.5 [5] e) Draw the distribution in d. [3] f) Compute the probability that that number of defects per is between 1 and 2 [5] g) Draw the distribution in d. [3] vQuestion 1 [25]
Namibia Car Dealers wants to determine the number of defects per new car. Suppose you are asked to conduct the quality survey for cars, suppose you sampled 30 new cars and following data on number of defects per car were recorded.
0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2 a) Compute the sample mean number of defects per car [2] b) Compute the sample standard deviation [5] c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively [2] d) Compute the probability that number of defects per car more than 1.5 [5] e) Draw the distribution in d. [3] f) Compute the probability that that number of defects per is between 1 and 2 [5] g) Draw the distribution in d. [3] vQuestion 1 [25]
Namibia Car Dealers wants to determine the number of defects per new car. Suppose you are asked to conduct the quality survey for cars, suppose you sampled 30 new cars and following data on number of defects per car were recorded.
0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2 a) Compute the sample mean number of defects per car [2] b) Compute the sample standard deviation [5] c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively [2] d) Compute the probability that number of defects per car more than 1.5 [5] e) Draw the distribution in d. [3] f) Compute the probability that that number of defects per is between 1 and 2 [5] g) Draw the distribution in d. [3] vQuestion 1 [25]
Namibia Car Dealers wants to determine the number of defects per new car. Suppose you are asked to conduct the quality survey for cars, suppose you sampled 30 new cars and following data on number of defects per car were recorded.
0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2 a) Compute the sample mean number of defects per car [2] b) Compute the sample standard deviation [5] c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively [2] d) Compute the probability that number of defects per car more than 1.5 [5] e) Draw the distribution in d. [3] f) Compute the probability that that number of defects per is between 1 and 2 [5] g) Draw the distribution in d. [3] Question 1 [25]
Namibia Car Dealers wants to determine the number of defects per new car. Suppose you are asked to conduct the quality survey for cars, suppose you sampled 30 new cars and following data on number of defects per car were recorded.
0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2 a) Compute the sample mean number of defects per car [2] b) Compute the sample standard deviation [5] c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively [2] d) Compute the probability that number of defects per car more than 1.5 [5] e) Draw the distribution in d. [3] f) Compute the probability that that number of defects per is between 1 and 2 [5] g) Draw the distribution in d. [3] Question 1 [25]
Namibia Car Dealers wants to determine the number of defects per new car. Suppose you are asked to conduct the quality survey for cars, suppose you sampled 30 new cars and following data on number of defects per car were recorded.
0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2 a) Compute the sample mean number of defects per car [2] b) Compute the sample standard deviation [5] c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively [2] d) Compute the probability that number of defects per car more than 1.5 [5] e) Draw the distribution in d. [3] f) Compute the probability that that number of defects per is between 1 and 2 [5] g) Draw the distribution in d. [3]

Answer 1

a) Compute the sample mean number of defects per car [2]
b) Compute the sample standard deviation [5]

Step 1 : Make a table as shown below to find the square of the defects.

c) Compute the standard error of mean, assuming that ?̅ and s are equal to ? and ? respectively

d) Compute the probability that number of defects per car more than 1.5 [5]
e) Draw the distribution in d

f) Compute the probability that that number of defects per is between 1 and 2 [5]
g) Draw the distribution in d.