The null value is the value we would expect for the parameter if the null hypothesis was true. For a single proportion, the null value will be between 0 and 1. For difference of proportions, the null value will be 0. (Later, we will also include means and difference of means.) For each example below, determine if the parameter is a single proportion or a difference of proportions and state the null value. a) You want to know if 40% of the people will vote the upcoming election. The parameter is a proportion The null value = 0.4 b) You want to know if women are more likely to eat breakfast than men. The parameter is a difference of proportions v The null value =0 c) You want to know if divorce rates are higher in urban areas than in rural areas. The parameter is a difference of proportions The null value =0 d) You want to know if a majority of congressmen support an upcoming bill. The parameter is a proportion The null value - 0.

Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…

Is parameter proportion the same as statistical proportion. so lets say the statistical proportion is 0.49. Would the parameter proportion be 0.49 as well ?

at 2 presented based on the Health Information National Trends Survey (HINTS) LALYSIS

6. For the data set with u = 50 and o = 5 What percent of the data is between... 45 and 50 45 and 55 40 and 50 60 and 65 50 and 65 above 50

your car is more crowded than you think.  table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.