One-sample z test Statistics Inference with the z and t Distributions One-sample z test Questions What does a z-test measure? What type(s) of distributions can a z-test be applied to? How do you calculate a z-score? What is the z-score of X, if n = 25, #mu= 60#, SD = 12, and X =58? What is the z-score of X, if n = 135, #mu= 70#, SD = 1, and X =75? What is the z-score of X, if n = 135, #mu= 74#, SD =3, and X =73? What is the z-score of X, if n = 4, #mu= 60#, SD =3, and X =60? What is the z-score of X, if n = 3, #mu= 55#, SD =2, and X =56? What is the z-score of X, if n = 57, #mu= 35#, SD =5, and X =13? What is the z-score of X, if n = 72, #mu= 137#, SD =25, and X =13? What is the z-score of X, if n = 204, #mu= 15#, SD =1, and X =35? What is the z-score of X, if n = 394, #mu= 42#, SD =11, and X =68? What is the z-score of X, if n = 20, #mu= 20#, SD =3, and X =31? What is the z-score of X, if #mu= 24#, SE =3, and X =31? What is the z-score of sample X, if #n = 100, mu= 45, SD =30, and E[X] =31#? What is the z-score of sample X, if #n = 9, mu= 56, SD =30, and E[X] =32#? What is the z-score of sample X, if #n = 64, mu= 56, SD =20, and E[X] =320#? What is the z-score of sample X, if #n = 4, mu= 32, SD =10, and E[X] =31#? What is the z-score of sample X, if #n = 49, mu= 75, SD =42, and E[X] =88#? What is the z-score of sample X, if #n = 49, mu= 15, SD =35, and E[X] =38#? What is the z-score of sample X, if #n = 49, mu= 35, SD =105, and E[X] =39#? What is the z-score of sample X, if #n = 81, mu= 43, St. Dev. =90, and E[X] =57#? What is the z-score of sample X, if #n = 144, mu= 41, St. Dev. =120, and E[X] =63#? What is the z-score of sample X, if #n = 144, mu= 71, St. Dev. =12, and E[X] =77#? What is the z-score of sample X, if #n = 144, mu= 61, St. Dev. =12, and E[X] =62#? What is the z-score of sample X, if #n = 225, mu= 90, St. Dev. =90, and E[X] =78#? What is the z-score of sample X, if #n = 169, mu= 33, St. Dev. =39, and E[X] =37#? What is the z-score of sample X, if #n = 169, mu= 42, St. Dev. =39, and E[X] =12#? What is the z-score of sample X, if #n = 169, mu= 41, St. Dev. =39, and E[X] =43#? What is the z-score of sample X, if #n = 100, mu= 61, St. Dev. =43, and E[X] =98#? What is the z-score of sample X, if #n = 100, mu= 99, St. Dev. =43, and E[X] =95#? What is the z-score of sample X, if #n = 400, mu= 41, St. Dev. =65, and E[X] =31#? What is the z-score of sample X, if #n = 121, mu= 33, St. Dev. =110, and E[X] =32#? What is the z-score of sample X, if #n = 121, mu= 33, St. Dev. =110, and E[X] =46#? What is the z-score of sample X, if #n = 121, mu= 23, St. Dev. =110, and E[X] =43#? What is the z-score of sample X, if #n = 121, mu= 55, St. Dev. =110, and E[X] =107#? What is the z-score of sample X, if #n = 196, mu= 45, St. Dev. =28, and E[X] =29#? What is the z-score of sample X, if #n = 196, mu= 45, St. Dev. =28, and E[X] =40#? What is the z-score of sample X, if #n = 196, mu= 52, St. Dev. =28, and mu_X =49#? What is the z-score of sample X, if #n = 196, mu= 55, St. Dev. =42, and mu_X =58#? What is the z-score of sample X, if #n = 196, mu= 71, St. Dev. =42, and mu_X =83#? What is the z-score of sample X, if #n = 256, mu= 42, St. Dev. =80, and mu_X =89#? What is the z-score of sample X, if #n = 256, mu= 17, St. Dev. =80, and mu_X =22#? What is the z-score of sample X, if #n = 256, mu= 67, St. Dev. =80, and mu_X =56#? What is the z-score of sample X, if #n = 256, mu= 88, St. Dev. =128, and mu_X =96#? What is the z-score of sample X, if #n = 256, mu= 88, St. Dev. =128, and mu_X =104#? What is the z-score of sample X, if #n = 36, mu= 38, St. Dev. =66, and mu_X =14#? What is the z-score of sample X, if #n = 55, mu= 38, St. Dev. =66, and mu_X =43#? What is the z-score of sample X, if #n = 67, mu= 38, St. Dev. =18, and mu_X =76#? What is the z-score of sample X, if #n = 54, mu= 37, St. Dev. =30, and mu_X =42#? What is the z-score of sample X, if #n = 54, mu= 12, St. Dev. =30, and mu_X =11#? What is the z-score of sample X, if #n = 54, mu= 11, St. Dev. =33, and mu_X =14.5#? What is the z-score of sample X, if #n = 36, mu= 12.3, St. Dev. =47, and mu_X =18.5#? What is the z-score of sample X, if #n = 36, mu= 12.3, St. Dev. =21, and mu_X =18.5#? What is the z-score of sample X, if #n = 36, mu= 13.7, St. Dev. =21, and mu_X =9.9#? What is the z-score of sample X, if #n = 36, mu= 5, St. Dev. =9, and mu_X =6#? What is the z-score of sample X, if #n = 36, mu= 8, St. Dev. =9, and mu_X =11.2#? If the mean of numbers 28, x, 42, 78 and 104 is 62, what is the mean of 48, 62, 98, 124 and x? A day care program has an average daily expense of $75.00. The standard deviation is $5.00. The owner takes a sample of 64 bills. What is the probability the mean of his sample will be between $70.00 and $80.00? What's the diff between a z-score, t-score and a P value? Once you have a z-score, how do you calculate the value that is found in the z-tables? What is the z score corresponding to the top 10 percent of any data set? What is the z score of 0.05? How do z scores work? How do you find the z-score that corresponds to an area of 0.45? What is the z-score having area 0.09 to its left under the standard normal curve? How do I know whether to use the Z-table or T-table? What is the area above a z score of +3.00? What is the z-value at #alpha = 0.025#? Once you have a z-score, how do you calculate the value that is found in the z-tables? How do I find the z-score of numbers that go above what's in the table? What is the the value of z for which the area under the normal curve to the right of z is equal to 0.76? What is the Z-score that has 95.91% of the distribution's area to the left? What is the Z-score that has 78.52% of the distribution's area to the right? For the z-test statistic 1.34, how do you compute the p-value assuming that the hypothesis test is a one-tailed test? How do you find the z-score for an IQ test score of 142 when the mean is 100 and the standard deviation is 15? Suppose that the sample mean for a random sample of 110 cars is 28.3 miles and assume the standard deviation is 3.2 miles. Is 26.9 against the alternative hypothesis that it is not 26.9? What is the test statistic??? What does a high and a low z-score mean? How do you find the area between two z-scores? Is there a formula you can go by if you have a set of data or are you supposed to refer to a chart? Shaun White won the gold medal with a score of 46.80, what is the corresponding z-score? A research company claims that more than 55% of American regularly watch FOX News Watch. How do you calculate the test statistic z for the population proportion? With Ha : μ = 160, you obtain a test statistic of z = -2.043. How do you find the p-value, accurate to 4 decimal places? Question #e1eee Question #0d64f What is the probability that a data value in a normal distribution is between a z-score of -0.28 and a z-score of 0.64? A set of data has a mean of 127 and a standard deviation of 15. What is the #z#-score of #x=118#? Inference with the z and t Distributions View all chapters One-sample z test Two-sample z test z Confidence intervals for the Mean One-sample t test Matched-pair t test Two-sample t test t Confidence intervals for the Mean Next