The mean exam score for 45 male high school students is 23.5 and the population standard deviation is 5.4. The mean exam score for 54 female high school students is 20.1 and the population standard deviation is 4.6. At a = 0.01, can you reject the claim that male and female high school students have equal exam scores? Complete parts (a) through (e). Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. O D. Male high school students have greater exam scores than female students. What are Ho and H? O A. Ho: H1 > H2 Ha: H1 SH2 O B. Ho: H1 #H2 Hạ: H1 =H2 O C. Ho: H1 SH2 Hạ: H1 > H2 O D. Ho: H12H2 Ha: H1

A normal distribution has a mean of 140 and a standard deviation of 7. Find the z-score for a data value of 141.

Use the normal distribution of SAT critical reading scores for which the mean is 514 and the standard deviation is 115. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 650​? (b) If 1000 SAT verbal scores are randomly​ selected, about how many would you expect to be greater than 550​? Click to view page 1 of the standard normal table. LOADING... Click to view page 2 of the standard normal table. LOADING...       Question content area bottom Part 1 (a) Approximately 1.181.18​% of the SAT verbal scores are less than 650. ​(Round to two decimal places as​ needed.) Part 2 (b) You would expect that approximately 0.880.88 SAT verbal scores would be greater than 550. ​(Round to the nearest whole number as​ needed.)

The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?