Suppose the mean of a normally distributed population is 300, and 200 simple random samples are drawn from the population. at a 68% confidence level, (one standard deviation from the mean), about how many of the samples’ confidence intervals would you expect to contain the population mean?
a. 64
b. 96
c. 136
d. 204

Option 3.

Step-by-step explanation:

Given information:

Mean of a normally distributed population = 300

Sample size = 200

Confidence level = 68%

We need to find how many of the samples confidence intervals would you expect to contain the population mean.

The sample size is 200 and confidence level is 68%. So, 68% of 200 contained in the population mean.

136 of the samples confidence intervals we would expect to contain the population mean.

Therefore, the correct option is 3.

42.4

step-by-step explanation:

convert to decimal

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x