Final answer:
A one-tailed (upper tail) test with a significance level of 0.234 requires finding the z-value corresponding to an area of 0.766 to the left. Without a standard normal distribution table, we cannot definitively select the correct answer from the provided options.
Step-by-step explanation:
The question inquires about the correct z-value associated with a one-tailed (upper tail) test at a specified level of significance. The level of significance given is 0.234, which means we are looking for the z-value that has 0.234 of the area in the upper or right tail of the normal distribution.
To find this, you would consult a standard normal distribution table (or use statistical software) and look for the area that matches 1 - 0.234 (since we want the upper tail), which is 0.766. The correct z-value associated with this area under the curve would be the one closest to the area corresponding to a 0.766 probability to the left, which is not directly provided in the excerpts or appendices above.
Without consulting the actual normal distribution table, we cannot definitively identify the correct z-value from options a, b, c, or d. Proper statistical tables or software would provide the exact z-value for a one-tailed test with the specified level of significance.