Do people who exercise regularly have a cholesterol level less than the recommended level of 140? A sample of 25 people who exercise regularly had an average LDL cholesterol of 132 and a standard deviation of 12. Using a significance level of .01, what is the critical value?

The mean difference in the sample (n=100) is -12.7 with a standard deviation of 8.9. A. construct a 95% confidence interval for the mean differences in depressive symptoms between drug and placebo. B. From a statistical standpoint, does this represent a significant change in depressive symptoms between the new drug and the placebo?

The concentration of blood hemoglobin in middle-aged adult females is normally distributed with a mean of 13.5 g/dL and a standard deviation of 0.86 g/dL. Determine the hemoglobin levels corresponding to the: 90th percentile Middle 85% of middle-aged adult female hemoglobin levels

In a recent awards ceremony, the age of the winner for best actor was 36 and the age of the winner for best actress was 51. For all best actors, the mean age is 43.2 years and the standard deviation is 5.3 years. For all best actresses, the mean age is 38.6 years and the standard deviation is 11.4 years. (All ages are determined at the time of the awards ceremony.) Relative to Use z scores to compare the given values. their genders, who had the more extreme age when winning the award, the actor or the actress? Explain. ..... had the more extreme age. and the z score for the actress is z = the Since the z score for the actor is z= Score T (Round to two decimal places.) U.S. adu lect five sing Table %00% 4. two of the 4. %6 23.08% 3 e fewer th. 98.61% 3. 96.67% (1) More Next %00 P Pearson Always Learning Copyright © 2022, 2018, 2014 Pearson Educati 95.24% 23min 10/18/21 10/18/21 L. 9:30am 9:53am OL %00 5min 10/08/21 10/08/21 E Notes 065 Comments States) 11:50am 11:53am %00% 26min…

Monthly sale figures for a particular e‐retailer tend to be normally distributed with mean equal to 150 thousand dollars and a standard deviation of 35 thousand dollars. Use the normaldistribution to determine the top 1% monthly sale figure (a.k.a. 99th percentile)?

In 16 women with diabetes, the morning blood sugar mean was 49.4  with a standard deviation of 24.0. In normal healthy women, the mean was 47.0. From the sample information, can we conclude that the blood sugar mean in women with rheumatoid arthritis is greater than that in normal women? Assume a significance level of 0.05.

A newspaper article noted that the mean life span for 35 male symphony conductors was 73.2   years with a standard deviation of 8.7 . Males in the general population have a mean life span of 69.5 years. Use a 0.05 significance level to test the claim that male symphony conductors have a mean life span that is greater than 69.5 years. a. Define the parameter     A. mu   ​= The mean life span of the 35 male symphony conductors in the sample   B. p​ = The proportion of all male symphony conductors who life more than 69.5 years   C. mu   ​= The mean life span of all male symphony conductors   D. mu   ​= The mean life span of all males   b. State the null and alternative hypotheses     A. Upper H 0 : mu equals 73.2    Upper H 1 : mu greater than 73.2     B. Upper H 0 : mu equals 69.5 Upper H 1 : mu greater than 69.5     C. Upper H 0 : mu greater than 69.5 Upper H 1 : mu equals 69.5     D. Upper H 0…