Question

Find the specified probability, from a table of Normal probabilities. 24) The number of hours per week that high school seniors spend on computers is normally distributed, with a mean of 6 hours and a standard deviation of 2 hours. 80 students are chosen at random. Let $y$ represent the mean number of hours spent on the computer for this group. Find the probability that $y$ is between 6.2 and 6.9. A) 0.817 B) 3.130 C) 0.371 D) 0.187 E) 0.134

          Find the specified probability, from a table of Normal probabilities.
24) The number of hours per week that high school seniors spend on computers is normally distributed, with a
mean of 6 hours and a standard deviation of 2 hours. 80 students are chosen at random. Let $y$ represent the
mean number of hours spent on the computer for this group. Find the probability that $y$ is between 6.2 and 6.9.
A) 0.817
B) 3.130
C) 0.371
D) 0.187
E) 0.134

Find the specified probability, from a table of Normal probabilities.
24) The number of hours per week that high school seniors spend on computers is normally distributed, with a
mean of 6 hours and a standard deviation of 2 hours. 80 students are chosen at random. Let y represent the
mean number of hours spent on the computer for this group. Find the probability that y is between 6.2 and 6.9.
A) 0.817
B) 3.130
C) 0.371
D) 0.187
E) 0.134

Added by Ann C.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Pritesh Ranjan

08/22/2023

Step 1

To find the probability, we need to convert the given values of y (6.2 and 6.9) to z-scores using the formula: z = (x - μ) / σ where x is the given value, μ is the mean, and σ is the standard deviation. For 6.2: z1 = (6.2 - 6) / 2 = 0.2 / 2 = 0.1 For 6.9: z2 Show more…

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Find the specified probability,from a table of Normal probabilities. 24 The number of hours per week that high school seniors spend on computers is normally distributed,with a mean of 6 hours and a standard deviation of 2 hours.80 students are chosen at random.Let y represent the mean number of hours spent on the computer for this group Find the probability that y is between 6.2and 6.9 A0.817 B)3.130 C0.371 D0.187 E0.134