You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly less than 76%. With HA : p < 76% you obtain a test statistic of z = −2.14. Find the p-value accurate to 4 decimal places. p-value = P(z < -2.14) = I need help

Mean (Average): 76 Population Standard Deviation, σ 19 Total Numbers, N 45       What is the z-score for a grade of 85? What is the probability of randomly choosing a score that is 85 or less (in other words, what proportion of scores is 85 or below)?

Interpret the Z score for a student who scored an 91 on an exam that had a mean of 86 and a standard deviation of 5. One mean above the standard deviation One standard deviation above the mean One standard deviation below the mean One mean below the standard deviation

Keep getting it wrong.

Mean (Average): 76 Population Standard Deviation, σ 19 Total Numbers, N 45     What is the z-score for a grade of 65? What is the probability of randomly choosing a score that is 65 or more?

Q You may need to use the appropriate appendix table or technology to answer this question. Last year, 50% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 35% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 60 business owners. (a) How many business owners in the survey plan to provide a holiday gift to their employees this year? business owners (b) Suppose the business owners in the sample did as they plan. Compute the p-value for a hypothesis test that can be used to determine if the proportion of business owners providing holiday gifts has decreased from last year. Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = (c) Using a 0.05 level of significance, would you conclude that the proportion of business owners providing gifts decreased? Reject Ho. There is…

answer both parts  please list z score  an the intervals like mean and standard devation. test stastic  fortmula with values the procedure name the parameter in c level context  and if its random or normal

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How do you find proportion of normal distributions ? Because I don't understand how a score less than or equal to 6.0 can be the same as 0.303 in the actual data

A test of the claim that the proportion of residents with that least two jobs is more than 53% produces the test statistic z = 1.68  Find the P-value.