# Week3 | Statistics homework help

**Use the appropriate descriptive statistics from W2 Project or run new descriptive statistics for Recall1 using Microsoft Excel.****Assuming that the sample statistics you computed are exactly equivalent to the corresponding population parameters, and using the formula****X****= (±****z****)(sd) +****M****(see below) identify the following:****The exact score on Recall1 that would fall at the upper 5% cutoff (extremely high score?) (Be sure to use the formula given below and round to two decimal places)****The exact score on Recall1 that would fall at the lower 5% cutoff (extremely low score?) (Be sure to use the formula given below and round to two decimal places)**

**To find these hypothetical scores, solve for X (your raw score) using the following formula, and round to two decimal places:**

**X****= (±z)(sd) +** **M****, where**

**z****= The z-score cutoff for 5 percent in the tail (±1.645)**

**sd = Your sample standard deviation for Recall1**

**M****= Your sample mean for Recall1**

**Use Microsoft Excel to compute z-scores for Recall1, following the instructions given in your lecture. Copy the table below into your Microsoft Word document, and complete the table, indicating the appropriate z-scores corresponding to each of the participants whose score is given.**

**Subject ID**

**Recall at Time 1**

**Z****-score**

**P5**

**8**

**P10**

**12**

**P15**

**10**

**P20**

**8**

**P25**

**9**

**Write a brief paragraph interpreting these z-scores (e.g., how each individual did in relation to the class in terms of the mean and standard deviation of the z-score distribution (not the raw score mean and SD) the percentile the participant would fall into).**