In each of Exercises, determine the critical value(s) for a one-mean z-test. For each exercise, draw a graph that illustrates your answer. A left-tailed test with a = 0.05.

After three exams Denny has a mean score of 74 with only one exam remaining in the class what is the minimum score she will need on that exam to have an overall of an 80

I don't understand how to complete this. please show step by step

Among freshmen at a certain university, scores on the Math SAT followed the normal curve, with an average of 550 and an SD of 100.  The SAT score of a student whose score is at the 99th percentile is closest to what value? Group of answer choices 780 400 760 805

You are a consumer psychologist interested in holidy spending. A national census reports that the American family spent an average of μ = $81 for Halloween candy and costumes last year. A sample of N = 16 families this year produced a mean of $85 with s = 20  A) State your non-directional null and alternative hypothesis

Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. ... The indicated IQ score is. (Round to the nearest whole number as needed.) X 5 0.3204

You are a consumer psychologist interested in holiday spending. A national census reports that the American family spent an average of µ = $81 for Halloween candy and costumes last year. A sample of N = 16 families this year produced a mean of $85 with s = 20. t-value ? t-critical?

IQ tests supposedly measure our intelligence. They typically are ‘normed’ so that they have a mean of 100 and a standard deviation of 15. (Higher scores show higher intelligence.) Use the graph and use the z-score and percents from columns b and c in Table A, when relevant. If you scored 132, what is your z-score? (Interpret.) Use table A  X, z(a), (b), and (c) X z (a) (b) (c)          and use the graph! Write down or save your response to use in Part 2 of this quiz. Group of answer choices -2.53 z. I'm at the 98.34 percentile rank and 1.66% of people scored smarter than me. 2.13 z. I'm at the 98.34 percentile rank and 1.66% of people scored smarter than me. -2.13 z. I'm at the 1.66 percentile rank and 98.34% of people scored smarter than me. 2.53 z. I'm at the 0.57 percentile rank and 99.43% of people scored smarter than me. 2.13 z. I'm at the 1.66 percentile rank and 98.34% of people scored smarter than me. 2.53 z. I'm at the 99.43 percentile rank…