1 0f 50 Refer to the graph below to answer the question that follows. Values along the xaxis are shown at intervals corresponding to 1, 2 and 3 standard deviations from the mean. Which value has a zscore of -2? 049 057 O41 O37 11 0f50 In calculations of the condence interval for a mean with known population 0, the standard error is calculated as (I O Oi: p4 of 50 The number of accidents in a factory for each month is provided: Imam 25 28 24 18 17 27 9 18 22 14 12 26 Which hypothesis test would be appropriate for determining whether some months have a greater number of accidents than others? O Least-squares regression O Two-sample ztest for means 0 Chi-square test for goodness of t 0 Chi-square test for independence 0 One-sample ztest for means 38 of 50 This two-way table summarizes data about the occurrences of two patient measurements in combination: blood pressure (BP) and cholesterol level (C) for 53 individuals who were measured at the infirmary of a large steel mill as part of their annual check-ups: High BP Normal BP HBP NBP High Cholesterol HC 13 11 Normal Cholesterol NC 8 21 Which hypothesis test would be appropriate for testing the relationship between cholesterol and blood pressure? O Least-squares regression O Two-sample z-test for means O Chi-square test for goodness of fit O Chi-square test for independence O One-sample z-test for means 39 of 50 The number of accidents in a factory for each month is provided: Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec 25 28 24 18 17 27 9 18 22 14 12 26 A total of 240 accidents occurred for the entire year. What is the expected frequency for July? 0 6 0 9 O 12 O 20 O 364 0f50 Based on the graph of this normal distribution. 85 95 105 [15 1'25 1' 35 145 The standard deviation is: O 115/6 0 1 O 10 0 cannot be determined without calculations \f7 0f 50 Refer to the graph below to answer the question that follows. Values along the xaxis are shown at intervals corresponding to 1, 2 and 3 standard deviations from the mean. What percentage of values should fall between 49 and 53? 053 068 034 0 not enough information to