For a population with µ = 80 and σ = 9, find the z-score for each of the following X values. (Note: You probably will need to use a formula and a calculator to find these values. Type your answers to two decimal places.)
X | z | X | z | X | z |
---|---|---|---|---|---|
83 | 75 | 91 | |||
67 | 85 | 68 |
Focusing on the last part 41. Gravetter/Wallnau/Forzano, Essentials-Chapter 8-End-of-chaptor question 15 Aa Aa A high school...
1. Gravetter/Wallnau/Forzano, Essentials Chapter 5 End-of-chapter question 4 Aa Aa For a population with μ = 40 and σ-8: Find the z-score for each of the following X values. (Note: You should be able to find these values using the definition of a z-score. You should not need to use a formula or do any detailed calculations. Type your answer to two decimal places.) 48 34 56 38 32 L Find the score (X value) that corresponds to each of...
4. Gravetter/Wallnau/Forzano, Essentials - Chapter 2 End-of-chapter question 14 Aa Aa For the following scores: 15, 14, 9, 10, 15, 12, 14, 11, 13, 14, 13, 14, 12, 14, 13, 13, 12, 11 Organize the scores in a frequency distribution table. If there are rows in the table below the minimum value of X, leave the X and f blank on any unused rows at the bottom Based on the frequencies, identify the shape of the distribution The distribution is...
Are my answers correct? 2. Gravetter/Wallnau/Forzano, Essentials - Chapter 10 - End-of-chapter question 6 Two separate samples receive different treatments. After treatment, the first sample has n = 6 with SS = 236, and the second has n = 12 with SS = 340. The pooled variance for the two samples is 36.00 . Compute the estimated standard error for the sample mean difference. Estimated S(M1 - M2) = 3.00 If the sample mean difference is 7 points, is this...
6. Gravetter/Wallnau/Forzano, Essentials - Chapter 14 - End-of-chapter question 14 Aa Aa E Drag blue circles onto the following graph to sketch the line for the equation Y = 2X - 1. On the same graph, drag orange squares to show the line for Y = -X + 8. Y 2x-1 Y = -X + 8 0 2 4 6 8 10 X Clear All
3. Gravetter/Wallnau/Forzano, Essentials - Chapter 13 - End-of-chapter question 17 Aa Aa The following matrix presents the results from an independent-measures, two-factor study with a sample of n participants in each treatment condition. Note that one treatment mean is missing. 10 Factor B B2 Factor A A1 A2 B1 M-5 What value for the missing mean would result in no main effect for factor A? What value for the missing mean would result in no main effect for factor B?...
6. Gravetter/Wallnau/Forzano, Essentials - Chapter 1- End-of-chapter question 22 Use summation notation to express each of the following calculations Add the scores and square the sum O 2(SX) Square each score and then add the squared values Ο Σ(2x + 1) Subtract 2 points from each score and then add the resulting values. Σ(X-29 O (2x)2-2 Ο Σ(x-2) Subtract 1 point from each score and square the resulting values. Then add the squared values. O (2x)2-1 Ο Σ(X2-1)
7. Gravetter/Wallnau/Forzano, Essentials Chapter 12 End-of-chapter question 22 Aa Aa 을 The following data have the same sample means and variances that appeared in the preceding question but the sample size is increased to n = 10. n 10 n=10 n 10 T-10 T=50 T=60 s2-9.00 s2 = 10.00 s2-11.00 SS-81 SS = 90 SS = 99 G=120 Σχε = 890 Predict how the increase in sample size should affect the F-ratio for these data. Use an ANOVA to check...
corrections, please Attention: Due to a bug in Google Chrome, this page may not tunction correctly, Click here to learn more. Attention: Due to a bug in Google Chrome, this page may not function correcty Caick here to learn more. 4. Gravetter/Wallnau/Forzano, Essentials - Chapter 8- End-of-chapter question 6 Aa Aa Ackerman and Goldsmith (2011) report that students who study from a screen (phone, tablet, or computer) tended to have lower quiz scores than students who studied the same material...
Are my answers correct? 5. Gravetter/Wallnau/Forzano, Essentials - Chapter 15 - End-of-chapter question 18 A recent study indicates that people tend to select video game avatars with characteristics similar to those of their creators (Bélisle & Onur, 2010). Participants who had created avatars for a virtual community game completed a questionnaire about their personalities. An independent group of viewers examined the avatars and recorded their impressions of the avatars. One personality characteristic considered was introverted/extroverted. The following frequency distribution of...
A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT than students who do not attend the preparation course. For those who do not attend the course, the population mean is 1050 (? = 1050). The 16 students who attend the preparation course average 1200on the SAT, with a sample standard deviation of 100. On the basis of these data, can the researcher conclude that the preparation course has...