a) p̂ = x/n = 0.178
b) the sample is a simple random sample, the value of np(1-p) is 335.213 which is greater than 10 and the sample size is less than or equal to 5% of the population size
c)
Level of Significance, α =
0.10
Number of Items of Interest, x =
408
Sample Size, n = 2287
Sample Proportion , p̂ = x/n =
0.1784
z -value = Zα/2 = 1.645 [excel
formula =NORMSINV(α/2)]
Standard Error , SE = √[p̂(1-p̂)/n] =
0.0080
margin of error , E = Z*SE = 1.645
* 0.0080 = 0.0132
90% Confidence Interval is
Interval Lower Limit = p̂ - E = 0.178
- 0.0132 = 0.1652
Interval Upper Limit = p̂ + E = 0.178
+ 0.0132 = 0.1916
90% confidence interval is ( 0.165 < p
< 0.192 )
answer: option B) (0.165 and 0.192)
5. A survey of 2287 adults in a certain large country aged 18 and older conducted...
A survey of 2288 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 415 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated...
A survey of 2303 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 407 have donated bloood in the past two years. Complete parts (a) through (c) below. Thanks! A survey of 2303 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 407 have donated blo lick here to view page 1). Click here to view the standard normal distribution table (page...
A survey of 2297 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 419 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated...
A survey of 2317 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 413 have donated blood in the past two years. Complete parts (a) through (b) below. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. (Round to three decimal places as needed.) (b) Construct and interpret a 90% confidence interval for...
A survey of 2289 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 429 have donated blood in the past two years. Complete parts (a) through (c) below. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. D= 0.187 (Round to three decimal places as needed.) (b) Verify that the requirements for constructing...
A survey of 2311 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 407 have donated blood in the past two years. Complete parts (a) through (c) below. page 1 (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. P 6.678 Round to three decimal places as needed.) (b) Verify that the requirements...
A survey of 2310 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 412 have donated blood in the past two years. Complete parts (a) through (c) below. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. ModifyingAbove p with caret<="" path="">pequals= (Round to three decimal places as needed.) (b) Verify that the...
A survey of 2287 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 406 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). LOADING... Click here to view the standard normal distribution table (page 2). LOADING... (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who...
a survey of 2313 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 414 have donated in the past two years. Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. (round to three decimal places if needed)
7) A survey of 4319 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 722 have donated blood in the past two years. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. (b) Verify that the requirements for constructing a confidence interval about p are satisfied. (c) Construct and interpret a 92% confidence...